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Capsular release

Surgeon-side topic for capsular release. Backed by 415 articles from the corpus, retrieved via combined MeSH + title-text matching.

70 citationsUpdated Sep 2026
Illustration: Capsular release

For patients: a plain-language version of this topic is available. See the patient guide.

Overview

Arthroscopic capsular release is a reliable surgical intervention for restoring motion with minimum morbidity in carefully selected patients [1]. It is indicated for refractory cases of shoulder stiffness, such as adhesive capsulitis, typically after 9 to 12 months of failed nonsurgical management [13, 16]. While conservative treatment remains the primary choice for shoulder stiffness, arthroscopic capsular release is preferred over manipulation under anesthesia due to the risks associated with the latter [13]. The procedure is suitable for idiopathic frozen shoulder and has demonstrated a high success rate regardless of the underlying aetiology [7, 10]. In patients with refractory primary frozen shoulder syndrome, it leads to a faster and long-lasting recovery [10]. Although most shoulders with early motion loss after rotator cuff repair recover motion and rarely require capsular release, the procedure is an option for those who do not [4, 18].

Clinically, patients experience almost immediate relief of pain and dramatic improvements in range of motion in the short term [6]. This immediate improvement has not been seen with injections or physiotherapy [6]. Significant reductions in pain, improvements in range of motion, and overall shoulder function are observed within the first postoperative week [12]. On average, significant pain relief, restoration of motion, and function are achieved within 3 months [2]. At a mean 24 months follow-up, outcomes remain favorable for adhesive capsulitis [9]. The procedure can restore relatively normal function and health-related quality of life in most patients with shoulder contracture within six months of surgery [24]. Long-term results have been confirmed in 255 patients with frozen shoulder [20].

Despite these benefits, more than 50% of patients experienced persistent pain and motion limitations at the 6-months postoperative follow up [9]. The quality of evidence available is low, and data demonstrate little benefit for capsular release instead of, or in addition to, an MUA [11]. Isolated arthroscopic debridement and capsular release may not provide substantial benefit to justify its use in most patients with glenohumeral arthritis [8]. Stepwise rehabilitation is mandatory after the procedure [13]. Arthroscopic capsular release is a very cost-effective procedure [24].

Anatomy & Pathophysiology

Glenohumeral Joint Anatomy

The glenohumeral joint is a ball-and-socket articulation where the large humeral head articulates against, but not within, the small glenoid cavity [67]. The glenoid cavity is a shallow socket approximately one-third the size of the humeral head [56]. The joint capsule extends from the glenoid rim laterally toward the surgical neck of the humerus, blending with the tendons of the rotator cuff musculature [62]. The rotator interval is defined medially by the base of the coracoid, superiorly by the supraspinatus tendon, and inferiorly by the subscapularis tendon [58]. This interval contains the coracohumeral ligament, the superior glenohumeral ligament, and the intra-articular portion of the long head of the biceps tendon [58].

The static restraints of the glenohumeral joint are distributed among specific ligaments. The coracohumeral ligament restricts external rotation in adduction and serves as a static restraint to inferior and posterior translation in adduction and external rotation [58]. The superior glenohumeral ligament is a primary static restraint against anterior translation with the arm at the side [58]. The middle glenohumeral ligament is a primary static restraint against anterior translation with the arm in external rotation and 45° of abduction [58]. The anterior band of the inferior glenohumeral ligament is a primary static restraint against anterior-inferior dislocation in 90° of abduction and external rotation [58]. The posterior band of the inferior glenohumeral ligament is a primary static restraint against posterior-inferior translation in internal rotation and adduction [58].

The coracoacromial ligament serves as an arthroscopic landmark for a complete release of the rotator interval for adhesive capsulitis [69]. The subscapular bursa lies between the subscapularis tendon and the neck of the scapula and communicates with the joint cavity between the superior and middle glenohumeral ligaments [59]. The humeroscapular motion interface lies between the inner structures of the proximal humerus, rotator cuff, coracohumeral ligament, and biceps tendon sheath and the superficial layer of the acromion, deltoid, coracoacromial ligament, coracoid process, and conjoined tendon [61]. The axillary nerve passes beneath the conjoined tendon anterior to the subscapularis 3 to 5 mm medial to the musculotendinous junction and then adjacent to the inferior capsule before entering the quadrilateral space posteriorly [61].

Pathophysiology of Adhesive Capsulitis

Adhesive capsulitis presents clinically as limited active and passive range of motion caused by the formation of adhesions of the glenohumeral joint capsule [25]. Radiographically, the condition is characterized by thickening of the capsule and rotator interval [25]. The underlying pathology relates to inflammation and the formation of extensive scar tissue [25]. Risk factors include diabetes, hyperthyroidism, and previous cervical spine surgery [25].

Frozen shoulder is characterized by pain and restricted glenohumeral joint motion, especially external rotation [43]. It typically affects individuals aged 40 to 70 years, with the nondominant side more frequently affected and female sex more common [43]. The majority of cases are idiopathic, with patients with diabetes or thyroid disease disproportionately affected [43]. Other associations include prolonged chest or breast surgery and prolonged immobilization [43]. The essential lesion involves the coracohumeral ligament and the rotator interval capsule [43]. Histologically, frozen shoulder shows evidence of inflammation and fibrosis with a dense matrix of type III collagen containing fibroblasts and myofibroblasts similar to findings in Dupuytren disease [43].

The diagnosis is clinical, typically presenting with an insidious onset of pain followed by selective loss of external rotation, with global range of motion loss occurring in later stages [43]. In frozen shoulder, active range of motion and passive range of motion are classically equivalent [43]. Arthrography may demonstrate a loss of the normal axillary recess, revealing contracture of the joint capsule [43]. MRI may show thickening of the glenohumeral joint capsule along the axillary pouch, thickening of the coracohumeral ligament, obliteration of the subcoracoid fat triangle, and rotator interval synovitis [43]. None of these MRI findings are pathognomonic [43].

Most studies indicate that frozen shoulder involves both synovial inflammation and capsular fibrosis [141]. Cytokines such as TNF-alpha and interleukins produce synovitis in the glenohumeral joint and subacromial bursa, while matrix-bound TGF-beta may act as a persistent stimulus resulting in capsular fibrosis [141]. The pathophysiology differs between the upper and lower parts of the joint capsule [100]. Myofibroblast upregulators are elevated in joint capsules in posttraumatic contractures [126].

Posttraumatic or postsurgical shoulder stiffness results from excessive scar formation [43]. Motion loss is related to the area of surgery or trauma and may involve the humeroscapular motion interface, as well as contracture of the rotator cuff and capsule [43]. Posterior glenohumeral joint capsule contracture alters humeral head translations and/or the humeral axis of rotation during movement, creating conditions that lead to joint pathology [104]. The inferior capsular region has a more significant comparative strain during glenohumeral rotational motion than has been documented in previous studies [106].

Classification

Pathological Stages: Frozen shoulder is described as a benign condition consisting of three stages: ‘freezing’, ‘frozen’ and ‘thawing’ [34]. The underlying pathology of adhesive capsulitis relates to inflammation and formation of extensive scar tissue [25]. Restriction in range of motion in frozen shoulder results from thickening of the coracohumeral ligament, rotator interval and anterior capsule [34].

Etiologic Groups: Arthroscopic capsular release is equally effective across five identified etiologic groups of stiff shoulders [2]. This procedure provided significant pain relief, restoration of motion, and function within an average of 3 months across these groups [2].

Other Considerations: The presence of concomitant shoulder pathologies does not appear to affect the clinical outcomes in patients undergoing arthroscopic capsular release for frozen shoulder [26]. Arthroscopic capsular release is a reliable method for restoring motion with minimum morbidity in carefully selected patients with adhesive capsulitis of the glenohumeral joint [1]. In patients with refractory primary frozen shoulder syndrome, arthroscopic capsular release leads to a faster and long-lasting recovery [10]. Arthroscopic capsular release is a reliable and efficient method for frozen shoulder patients [29]. Arthroscopic capsular release is a very cost-effective procedure that can restore relatively normal function and health-related quality of life in most patients with shoulder contracture within six months of surgery [24]. Arthroscopic capsular release produces early symptom improvement in primary frozen shoulder [21]. Although arthroscopic capsular release yielded favorable outcomes at mean 24 months follow-up, more than 50% of patients experienced persistent pain and motion limitations at the 6-months postoperative follow up [9]. In a broad group of patients with recalcitrant adhesive capsulitis, the addition of the posterior capsular release did not improve patient function or range of motion over anterior capsular release alone at 6 months [19]. For children with shoulder contracture secondary to brachial plexus palsy, subscapularis-sparing isolated capsular release improves external rotation and functional scores and avoids any loss of active internal rotation but does not improve anterior elevation [38]. Although there are limited nonarthroplasty surgical options available for glenohumeral arthritis, isolated arthroscopic debridement and capsular release may not provide substantial benefit to justify its use in most patients [8]. Both manipulation and capsular release with manipulation significantly improved range of motion and produced satisfactory functional outcomes in shoulders with stiffness concomitant with rotator cuff repair [18]. Arthroscopic release resulted in normal motion in all cases of postoperative stiffness following arthroscopic rotator cuff repair [27]. Conservative treatment is the primary choice for shoulder stiffness, with manipulation under anesthesia or arthroscopic capsular release indicated for refractory cases [13]. Surgical intervention for adhesive capsulitis includes arthroscopic capsular release, manipulation under anesthesia, or both, both of which are efficacious [16]. Early intervention in patients with frozen shoulder will most likely lead to a considerable amount of needless surgical procedures, given the natural course of this condition with spontaneous resolution of symptoms in the majority of patients [134].

Clinical Presentation

Frozen shoulder is a benign condition characterized by insidious onset of true shoulder pain, night pain, and restriction of passive forward elevation to less than 100° and external rotation of less than one-half of normal [95]. The syndrome progresses through three stages—‘freezing’, ‘frozen’, and ‘thawing’—with eventual recovery, although many patients proceed to long-term pain and stiffness [34]. The typical patient is a female between 40 and 60 years of age [34]. While the prevalence in the general population is 2% [34], diabetic patients have a significant predisposition, with a prevalence of up to 20% in this population group [34].

Patients present with global restriction of passive shoulder motion [79]. Active motion is lost by more than 30% in all directions compared to the unaffected side, including at least a 50% reduction in external rotation [99].

Plain radiographs are normal [79]. Magnetic resonance imaging reveals no definite abnormalities at the rotator cuff, labrum, long head of the biceps, or acromioclavicular joint [79]. Radiographic findings in adhesive capsulitis include thickening of the capsule and rotator interval [25]. Arthroscopic findings confirming the diagnosis include inflamed synovium and a thickened rotator interval and capsule [79].

Investigations

Plain radiography: Standardized plain films are almost always sufficient to garner the information needed for shoulder evaluation [40]. The purpose of imaging is to help establish the diagnosis, determine the severity of the pathoanatomy, assist in surgical planning, and enable the surgeon to illustrate the condition of the shoulder to the patient [40]. The standard shoulder series should include orthogonal views, including a true AP view in the scapular plane, an AP view, an axillary view, and a scapular Y view [81]. At least two X-ray views should be obtained: an anteroposterior in the plane of the glenoid and an axillary projection with the arm in abduction to show the relationship of the humeral head to the glenoid [72]. The first key radiographic view is the anteroposterior (AP) in the plane of the scapula taken so that the x-ray beam passes through the glenohumeral joint [40]. The true AP view in the scapular plane visualizes anterior greater tuberosity in profile [81]. The AP view visualizes the posterior aspect of the greater tuberosity and the lesser tuberosity in profile [81]. The second key radiographic view is the axillary view taken with the arm in the functional position of elevation in the plane of the scapula [40]. The axillary view is referred to as the “truth view” because it demonstrates the glenohumeral relationships in the functional position of elevation [40]. The axillary view is necessary in evaluation of glenohumeral joint instability and enables determination of the humeral head position in the glenoid fossa [81]. The scapular Y view provides visualization of the coracoacromial arch and can reveal coracoacromial spurs [81]. The acromiohumeral distance is normally 7 to 14 mm [81]. The width of the glenohumeral joint space should be symmetric superiorly and inferiorly [81]. The coracoclavicular distance is normally 1.1 to 1.3 cm [81].

MRI: Magnetic resonance imaging (MRI) is the modality of choice for evaluating the rotator cuff, biceps, and subacromial/subdeltoid bursa [78]. MRI is useful to identify osteonecrosis of the humeral head, or a bone tumour [72]. MRI can identify labral tears and rotator cuff tears, although the accuracy for these is enhanced by combining the scan with arthrography [72]. T1-weighted MRI can reveal Hill-Sachs lesions and is often used with magnetic resonance (MR) arthrograms to provide a more detailed picture of the joint surfaces [78]. T2-weighted MRI provides better visualization of full thickness rotator cuff tears [78]. MR arthrography is considered the benchmark for evaluation for labral tears and rarely is indicated for evaluation of rotator cuff pathology [78]. MR arthrography (MRA) has proven utility by increasing both sensitivity and specificity in detecting injuries to the capsulolabral–ligamentous complex as compared to traditional MRI [76]. In a meta-analysis of the diagnostic test accuracy of MRA compared to MRI for the detection of glenoid labral injuries, MRA sensitivity was 88% and specificity 93%, versus MRI sensitivity 76% and specificity 87% [76]. Magnetic resonance (MR) accuracy in identifying labral and rotator cuff tears in the literature ranges from 70% to 100% [76]. Abduction and external rotation (ABER) of the arm is an alternative position utilized to increase the sensitivity and specificity for detecting anteroinferior labroligamentous injury [76]. MRAs can demonstrate a patulous capsule on the coronal, sagittal, and axial imaging in patients with multidirectional instability [76]. Seven informative MRI features were identified for diagnosing adhesive capsulitis of the shoulder, with axillary capsular enhancement and rotator interval joint capsule thickening showing the highest diagnostic accuracy [121]. MRI findings showed reduced joint capsule thickness and effusion following interventional microadhesiolysis for adhesive capsulitis [102].

CT: Computed tomography (CT) is helpful for planning fracture surgery and shoulder joint replacement [72]. CT with three-dimensional reconstructions is the advanced imaging study of choice for determining the extent of glenoid bone loss in the setting of shoulder instability [81]. When MRI or MR arthrography is contraindicated, CT arthrography is indicated [78].

Ultrasonography: Ultrasonography is a simple and accurate test for identifying rotator cuff tears and calcific tendinitis [72]. Ultrasonography can be useful in guiding injections or barbotage (aspirating calcific deposits in the rotator cuff) [72]. Ultrasonography is a low-cost alternative to MRI and arthrography for evaluating both skeletal and soft-tissue structures of the shoulder [78]. Ultrasonography can provide immediate, real-time visualization of the rotator cuff, biceps tendon, and calcific deposits [78]. Ultrasonography is highly operator dependent and is not as useful for evaluating labral tears or rotator cuff tears that are very small or larger than 3 cm [78].

Arthroscopy: Arthroscopy is useful for diagnosing and treating subacromial impingement, intra-articular lesions, detachment of the glenoid labrum and rotator cuff tears [72].

Treatment

Non-Operative

Arthroscopic capsular release is indicated for refractory cases of shoulder stiffness after conservative treatment fails [13]. Patients in whom 12 to 16 weeks of nonsurgical treatment fail are offered arthroscopic capsular release [43, 44]. In the context of idiopathic frozen shoulder, surgical treatment is necessary for less than 5% of those seeking care [48].

Operative

Indications: Arthroscopic capsular release is a suitable option for patients with refractory primary frozen shoulder syndrome [10]. It is preferred over manipulation under anesthesia due to the risks associated with manipulation [13]. Arthroscopy allows for a more controlled and complete capsular release not achieved with manipulation [91]. The arthroscopic 360° capsular release in the lateral decubitus position provides a comprehensive surgical treatment for patients with adhesive capsulitis by addressing inflamed or scarred capsular tissue in its entirety and obviating the need for manipulation under anesthesia [114].

Surgical Approach / Technique: The main objective of arthroscopic release is to perform a systematic release for the rotator interval, superior glenohumeral ligament, coracohumeral ligament, anterior capsule, middle glenohumeral ligament, inferior glenohumeral ligament (anterior and posterior bands), inferior capsule, and posterior capsule [48]. Each segment of the joint capsule affected range of motion in all directions, supporting the need for whole-joint capsular release [14]. However, the addition of the posterior capsular release did not improve patient function or range of motion over anterior capsular release alone at 6 months in patients with recalcitrant adhesive capsulitis [19], and posterior extended capsular release might not be necessary in arthroscopic surgery for shoulder stiffness [36]. Selective arthroscopic releases may accomplish specific gains in motion: rotator interval release for external rotation, inferior capsule release for external rotation, flexion, and internal rotation, and posterosuperior capsule release for internal rotation [41].

The procedure typically begins by locating and detaching the coracohumeral ligament from the coracoid to remove the primary restriction of external rotation and open the rotator interval [110]. Intra-articular arthroscopic access is facilitated by releasing the rotator interval and permitting visualization of the glenohumeral joint [110]. The rotator interval is first released under direct visualization, starting the capsular division anterior and inferior to the biceps tendon and continuing inferior to the upper edge of the subscapularis tendon [91]. The release is continued anteriorly and inferiorly to include the middle glenohumeral ligament and anterior band of the inferior glenohumeral ligament all the way to the 6 o'clock position, releasing the capsule in layers to protect the underlying subscapularis muscle belly and the adjacent labrum [91]. The arthroscopic release is performed starting in the rotator interval, working inferiorly, and around the glenoid using an ablative radiofrequency probe [122]. If there are difficulties gaining access to the posterior inferior capsule with the ablative probe, an accessory posterolateral portal is used or the arthroscope and ablative probe are swapped between the anterior and posterior portals [122].

Care is taken to perform the inferior release in layers under direct visualization, using an "outside-in" technique, and placing the arm in adduction and external rotation to protect and minimize risk of injury to the axillary nerve [91]. The inferior capsular release should be performed no more than 1 cm from the inferior labrum to avoid risk to the neurovascular structures [41]. If an arthroscopic release is to be performed in the 5-o’clock to 7-o’clock position at the inferior capsule, the surgeon must stay within 1 cm of the inferior capsule from muscle to protect the axillary nerve [41]. The arthroscope can be switched to the anterior portal to examine the posterior capsule and to debride synovitis or release any capsular contracture to perform a complete 360-degree release if necessary, though this is usually not required [91]. After the intraarticular capsular release is complete, a synovectomy and wide resection of the capsular margins are performed to prevent early scar formation and restricted capsular volume [41]. Through an axillary deltopectoral approach, a complete lysis of adhesions between the bursal surface around the proximal humerus and surfaces of the entire rotator cuff, coracoacromial arch, coracoid base, and conjoined tendon is performed [41]. In posttraumatic stiffness cases, the subscapularis tendon was not shortened but was only tethered by soft tissue adhesions and contracture around it, so a tenotomy or lengthening was not required [122]. Conversely, postsurgical contractures usually require a combined arthroscopic and open release, and a subscapularis lengthening may be necessary to restore external rotation [41]. Patients with diabetes require complete circumferential release if manipulation does not restore full motion [41]. The order of arthroscopy before or after manipulation is controversial, with some advocating manipulation first to facilitate arthroscope placement and others advocating arthroscopy first to avoid visualization issues from hemarthrosis [91].

Pain Management: Postoperative pain control is obtained with interscalene block, passive range of motion, careful follow-up, and early 3- to 4-week reintervention with arthroscopic procedures when indicated [41]. A supraclavicular catheter is placed before surgery under ultrasound guidance and left in place for pain management for the first 48 to 72 hours after surgery [41]. An interscalene nerve block or indwelling catheter in the recovery room has been shown to be beneficial in allowing the patient to tolerate early motion following shoulder arthroscopy [91].

Postoperative Care and Rehabilitation: The goal of postoperative care is to maintain the intraoperative range of motion that was achieved, provide adequate pain control, and begin immediate supervised therapy [91]. Postoperative care should always include immediate active-assisted range-of-motion exercises to be repeated continuously throughout the day [41]. Physical therapy for passive- and active-assisted range of motion is started within 24 hours [41]. Physical therapy with aggressive range of motion and hydrotherapy is recommended 5 days per week for the first 2 weeks and three times per week until mobility is achieved [91]. Reexamination is recommended within 3 weeks, with stretching exercises performed in all four quadrants, five times a day, with five repetitions of each stretching maneuver [41].

Other Considerations: Arthroscopic capsular release was equally effective across five identified etiologic groups, providing significant pain relief, restoration of motion, and function within an average of 3 months [2]. Patients who underwent arthroscopic capsular release for idiopathic adhesive capsulitis experienced significant reductions in pain, improvements in range of motion, and improvements in overall shoulder function in the first postoperative week [12]. Arthroscopic capsular release is the most effective therapeutic method in terms of pain relief, followed by physiotherapy and intraarticular steroid injection [51]. Arthroscopic capsular release provided significant pain relief and improvement in shoulder function in patients with frozen shoulder regardless of the timing of surgery [33]. Patients with idiopathic and post-traumatic shoulder stiffness have better outcomes than patients with postsurgical stiffness [52]. Both manipulation and capsular release with manipulation significantly improved range of motion and produced satisfactory functional outcomes in shoulders stiff concomitant with rotator cuff repair [18].

Complications and Contraindications: This procedure places the axillary nerve at risk [43, 44]. Pseudocholinesterase deficiency may be associated with a risk of atraumatic dislocation following arthroscopic capsular release and manipulation under anesthesia [116]. Complications include fracture, glenoid and labral injuries, neurapraxia, and rotator cuff pathology [25]. A recent systematic review found an overall complication rate of 0.6% during or following an arthroscopic capsular release, with superficial wound infection and brachial plexopathy cited as most common [91].

Complications

Nerve palsy: Neurapraxia is a recognized complication of capsular release procedures. In a series of 15 patients undergoing open anterior capsulotomy of the elbow, three transient nerve palsies occurred (2 radial, 1 ulnar), all resolving over a course of 3 weeks to 7 months [117]. Following open capsulotomy through the posterior approach for elbow stiffness, transient paresthesias of the ulnar nerve were noted in 1 of 7 patients [117]. In a systematic review of arthroscopic Bankart repair, nerve complications occurred in 0.07% of patients, with the musculocutaneous and axillary nerves being the most commonly affected [138]. Minor complications in wrist arthroscopy include transient superficial dorsal ulnar sensory neurapraxia and ulnar neurapraxia [143].

Wound complications: In a series of 14 patients undergoing arthroscopic anterior capsulotomy for post-traumatic elbow stiffness, one patient experienced a superficial portal site infection that resolved with drainage and oral antibiotic therapy [117]. No neurovascular complications were observed in this same series [117]. In a systematic review of arthroscopic Bankart repair, wound complications occurred in 0.03% of patients, with no deep wound infections reported [138]. Minor complications in wrist arthroscopy include superficial portal site infection and first-degree burns to the forearm after contact with a hot arthroscopic tower [143].

Stiffness / Arthrofibrosis: Frozen shoulder was the most common complication in a systematic review of arthroscopic Bankart repair, occurring in 0.32% of cases [138]. Musculoskeletal complications occurred in 0.30% of patients following arthroscopic Bankart repair, with frozen shoulder (0.21%) and biceps tendonitis (0.04%) being the most common [138]. Major complications reported in wrist arthroscopy include permanent stiffness after arthroscopic synovectomy [143]. Minor complications in wrist arthroscopy include transient wrist and finger joint stiffness [143].

Other Considerations: Complications of arthroscopic capsular release for adhesive capsulitis include fracture, glenoid and labral injuries, neurapraxia, and rotator cuff pathology [25]. Persistent pain occurred in 0.15% of patients following arthroscopic Bankart repair [138]. Hardware complications occurred in 0.05% of patients following arthroscopic Bankart repair, with the majority being symptomatic hardware [138]. In a series of 211 wrist arthroscopies, the overall complication rate was 5.2% [143]. Major complications in wrist arthroscopy also include the development of a symptomatic dorsal wrist ganglion over the 3-4 portal site requiring surgery [143]. Minor complications in wrist arthroscopy include extensor carpi ulnaris tendinitis [143]. All minor complications in the reported series of 211 wrist arthroscopies resolved at latest follow-up evaluation with conservative care [143]. A complication rate of 29% was reported in patients undergoing arthroscopic TFCC repair, requiring secondary procedures to address extensor digiti minimi tendon capture by the suture and sensory disturbances [143]. Complications documented after lower trapezius tendon transfer include seroma, hematoma, infection, re-tear, and nerve injury [144].

Recovery

Light activity (weeks): The evidence does not specify a distinct week-based timeline for the resumption of desk work, driving, or light activities of daily living.

Full activity (months): Arthroscopic capsular release provides significant pain relief, restoration of motion, and function within an average of 3 months [2]. Patients experience almost immediate relief of pain and symptoms and dramatic improvements in range of motion in the short term [6].

Complete recovery / outcome plateau (months): High patient satisfaction and statistically significant ROM and CMS recovery can be achieved after arthroscopic capsular release to manage frozen shoulder [152]. Arthroscopic capsular release results in an overall rapid significant improvement for primary and secondary frozen shoulder [28].

Rehabilitation protocol: Both manipulation and capsular release with manipulation significantly improved range of motion and produced satisfactory functional outcomes for shoulder stiffness concomitant with rotator cuff repair [18].

Functional milestones: For children with shoulder contracture secondary to brachial plexus palsy, subscapularis-sparing isolated capsular release improves external rotation and functional scores but does not improve anterior elevation [38].

Key Evidence

  • [L4] Arthroscopic capsular release is a reliable method for restoring motion with minimum morbidity in carefully selected patients. [1] (10.1007/s001670100194)
  • [L2] Arthroscopic capsular release was equally effective across the 5 identified etiologic groups, and provided significant pain relief, restoration of motion, and function within an average of 3 months. [2] (10.1053/jars.2003.50010)
  • [L1] Patients were grouped by technique: anterior-inferior capsular release, anterior-inferior-posterior capsular release, and 360-degree capsular release at follow up points 3, 6 and 12 months. [3] (10.1016/j.otsr.2020.102766)
  • [L3] Most shoulders with early motion loss recover motion and rarely require capsular release. [4] (10.1016/j.jse.2009.07.009)
  • [L5] Initial management of posterior capsular contracture should be nonsurgical, emphasizing range-of-motion stretching. [5] (10.5435/00124635-200605000-00002)
  • [L5] In the short term, patients who have had capsular release get almost immediate relief of pain and symptoms and dramatic improvements in range of motion, which has not been seen with injections or physiotherapy. [6] (10.1177/2325967120903707)
  • [L4] Arthroscopic capsular release has a high success rate regardless of the underlying aetiology. [7] (10.1016/j.otsr.2019.02.014)
  • [L4] Although there are limited nonarthroplasty surgical options available for glenohumeral arthritis, isolated arthroscopic debridement and capsular release may not provide substantial benefit to justify its use in most patients. [8] (10.1016/j.arthro.2014.08.025)
  • [L4] Although arthroscopic capsular release yielded favorable outcomes at mean 24 months follow-up, more than 50% of our patients experienced persistent pain and motion limitations at the 6-months postoperative follow up. [9] (10.5397/cise.2018.21.3.127)
  • [Paper] In patients with refractory primary frozen shoulder syndrome, arthroscopic capsular release emerges as a suitable option that leads to a faster and long-lasting recovery. [10] (10.1016/j.eats.2015.06.004)
  • [L4] The quality of evidence available is low and the data available demonstrate little benefit for a capsular release instead of, or in addition to, an MUA. [11] (10.1016/j.jse.2013.01.010)
  • [L4] Patients who underwent an arthroscopic capsular release for idiopathic adhesive capsulitis experienced significant reductions in pain, improvements in range of motion, and improvements in overall shoulder function in the first postoperative week. [12] (10.1016/j.jse.2015.12.025)
  • [L5] Conservative treatment is the primary choice for shoulder stiffness, with manipulation under anesthesia or arthroscopic capsular release indicated for refractory cases; arthroscopic capsular release is preferred due to risks associated with manipulation, and stepwise rehabilitation is mandatory after release. [13] (10.1016/j.arthro.2016.03.024)
  • [L4] Each segment of the joint capsule affected ROM in all directions, supporting the need for whole-joint capsular release; ROM was significantly greater on the affected side than on the unaffected side after surgery. [14] (10.1016/j.jse.2020.01.085)
  • [L3] Routine capsular repair did not lead to superior outcomes compared with a nonrepaired group, though it may be beneficial in younger, active patients and potentially lead to inferior outcomes in female patients. [15] (10.1016/j.arthro.2019.12.002)
  • [L5] Surgical intervention, typically considered after 9 to 12 months of failed nonsurgical management, includes arthroscopic capsular release, manipulation under anesthesia (MUA), or both, both of which are efficacious. [16] (10.1016/j.arthro.2025.03.027)
  • [L5] Circumferential capsular release improves range of motion in shoulder pathologies, particularly where no bony deformities exist, and the technique has evolved over time with benefits confirmed by recent studies. [17] (10.1016/j.arthro.2012.10.003)
  • [L3] Both manipulation and capsular release with manipulation significantly improved range of motion and produced satisfactory functional outcomes. [18] (10.1177/0363546513519326)
  • [L1] In this broad group of patients with recalcitrant adhesive capsulitis, the addition of the posterior capsular release did not improve patient function or ROM over anterior capsular release alone at 6 months. [19] (10.1016/j.arthro.2010.02.020)
  • [L4] The long-term results of arthroscopic capsular release in frozen shoulder were confirmed in 255 patients. [20] (10.1186/s13018-018-0758-5)
  • [L1] Arthroscopic capsular release produces early symptom improvement in primary frozen shoulder. [21] (10.1111/j.1758-5740.2009.00025.x)
  • [L4] Arthroscopic capsular release is a very cost-effective procedure that can restore relatively normal function and health-related quality of life in most patients with shoulder contracture within six months of surgery. [24] (10.1302/0301-620x.95b7.31197)
  • [L5] [25] (10.5435/jaaos-d-17-00606)
  • [L3] The presence of concomitant shoulder pathologies does not appear to affect the clinical outcomes in patients undergoing arthroscopic capsular release for frozen shoulder. [26] (10.1016/j.aott.2018.04.002)
  • [L4] Arthroscopic release resulted in normal motion in all cases. [27] (10.1016/j.arthro.2009.01.018)
  • [L3] Arthroscopic capsular release for primary and secondary frozen shoulder results in an overall rapid significant improvement. [28] (10.1016/j.arthro.2008.08.006)
  • [L3] Arthroscopic capsular release is a reliable and efficient method for frozen shoulder patients. [29] (10.1007/s00402-009-0900-2)
  • [L3] Arthroscopic capsular release provided significant pain relief and improvement in shoulder function in patients with frozen shoulder regardless of the timing of surgery. [33] (10.1016/j.jse.2020.07.023)
  • [L4] [34] (10.1177/1758573215578590)
  • [L1] Posterior extended capsular release might not be necessary in arthroscopic surgery for shoulder stiffness. [36] (10.1177/0363546514523720)
  • [L4] For children with shoulder contracture secondary to brachial plexus palsy, subscapularis-sparing isolated capsular release improves external rotation and functional scores and avoids any loss of active internal rotation but does not improve anterior elevation. [38] (10.1016/j.jse.2018.01.022)
  • [L4] Arthroscopic capsular release is the most effective therapeutic method in terms of pain relief, followed by physiotherapy and intraarticular steroid injection, while NSAID therapy did not provide significant pain relief. [51] (10.1186/s12891-024-07275-7)
  • [L4] Patients with idiopathic and post-traumatic shoulder stiffness have better outcomes than patients with postsurgical stiffness. [52] (10.1016/j.jse.2009.08.004)
  • [L5] [79] (10.1016/j.jse.2018.11.072)
  • [L2] [95] (10.1016/j.jse.2018.04.002)
  • [L5] [99] (10.1186/s12891-019-2536-x)
  • [L5] The pathophysiology of frozen shoulder differs between the upper and lower parts of the joint capsule. [100] (10.1016/j.jse.2018.03.010)
  • [L4] MRI findings showed reduced joint capsule thickness and effusion following the procedure. [102] (10.1186/1471-2474-9-12)
  • [L5] Posterior glenohumeral joint capsule contracture alters humeral head translations and/or the humeral axis of rotation during movement, creating conditions that lead to joint pathology. [104] (10.1111/j.1758-5740.2012.00180.x)
  • [L5] The inferior capsular region has a more significant comparative strain during glenohumeral rotational motion than has been documented in previous studies. [106] (10.1186/s13018-025-06548-8)
  • [L4] [110] (10.1016/j.arthro.2011.12.014)
  • [Paper] The arthroscopic 360° capsular release in the lateral decubitus position provides a comprehensive surgical treatment for patients with adhesive capsulitis by addressing inflamed/scarred capsular tissue in its entirety and obviating the need for manipulation under anesthesia. [114] (10.1016/j.eats.2016.05.007)
  • [L5] Pseudocholinesterase deficiency may be associated with a risk of atraumatic dislocation following arthroscopic capsular release and manipulation under anesthesia. [116] (10.5435/jaaosglobal-d-24-00135)
  • [L4] [117] (10.1016/j.jse.2010.01.003)
  • [L1] Seven informative MRI features were identified, with axillary capsular enhancement and rotator interval joint capsule thickening showing the highest diagnostic accuracy. [121] (10.1186/s12891-025-08592-1)
  • [L4] [122] (10.1016/j.jse.2007.11.014)
  • [L2] [126] (10.1097/blo.0b013e3180312c01)
  • [L5] [134] (10.1177/2325967120903710)
  • [L4] [138] (10.1016/j.jse.2023.08.013)
  • [L4] [141] (10.1007/s00776-013-0495-x)
  • [L5] [143] (10.5435/jaaos-20-11-725)
  • [Case_report] [144] (10.1016/j.xrrt.2023.12.002)
  • [L3] High patient satisfaction and statistically significant ROM and CMS recovery can be achieved after arthroscopic capsular release to manage frozen shoulder. [152] (10.1007/s00167-023-07561-2)

See Also

References

[1] 360° arthroscopic capsular release in patients with adhesive capsulitis of the glenohumeral joint – indication, surgical technique, results. Knee Surgery, Sports Traumatology, Arthroscopy. 2001. DOI: 10.1007/s001670100194

[2] Arthroscopic capsular release for stiff shoulders. Arthroscopy. 2003. DOI: 10.1053/jars.2003.50010

[3] Arthroscopic capsular release to treat idiopathic frozen shoulder: How much release is needed?. Orthopaedics & Traumatology: Surgery & Research. 2021. DOI: 10.1016/j.otsr.2020.102766

[4] Range of motion limitation after rotator cuff repair. Journal of Shoulder and Elbow Surgery. 2010. DOI: 10.1016/j.jse.2009.07.009

[5] Posterior Capsular Contracture of the Shoulder. Journal of the American Academy of Orthopaedic Surgeons. 2006. DOI: 10.5435/00124635-200605000-00002

[6] What Is the Right Timing for Arthroscopic Capsular Release of a Frozen Shoulder? Response. Orthopaedic Journal of Sports Medicine. 2020. DOI: 10.1177/2325967120903707

[7] Comparison of outcomes following arthroscopic capsular release for idiopathic, diabetic and secondary shoulder adhesive capsulitis: A Systematic Review. Orthopaedics & Traumatology: Surgery & Research. 2019. DOI: 10.1016/j.otsr.2019.02.014

[8] Arthroscopic Debridement and Capsular Release for the Treatment of Shoulder Osteoarthritis. Arthroscopy. 2014. DOI: 10.1016/j.arthro.2014.08.025

[9] Clinical Outcome after Arthroscopic Capsular Release for Adhesive Capsulitis of the Shoulder. Clinics in Shoulder and Elbow. 2018. DOI: 10.5397/cise.2018.21.3.127

[10] Primary Frozen Shoulder Syndrome: Arthroscopic Capsular Release. Arthroscopy Techniques. 2015. DOI: 10.1016/j.eats.2015.06.004

[11] Comparison of manipulation and arthroscopic capsular release for adhesive capsulitis: a systematic review. Journal of Shoulder and Elbow Surgery. 2013. DOI: 10.1016/j.jse.2013.01.010

[12] Short-term outcomes after arthroscopic capsular release for adhesive capsulitis. Journal of Shoulder and Elbow Surgery. 2016. DOI: 10.1016/j.jse.2015.12.025

[13] Shoulder Stiffness: Current Concepts and Concerns. Arthroscopy. 2016. DOI: 10.1016/j.arthro.2016.03.024

[14] Effects of joint capsular release on range of motion in patients with frozen shoulder. Journal of Shoulder and Elbow Surgery. 2020. DOI: 10.1016/j.jse.2020.01.085

[15] Routine Interportal Capsular Repair Does Not Lead to Superior Clinical Outcome Following Arthroscopic Femoroacetabular Impingement Correction With Labral Repair. Arthroscopy. 2020. DOI: 10.1016/j.arthro.2019.12.002

[16] Adhesive Capsulitis of the Shoulder. Arthroscopy: The Journal of Arthroscopic & Related Surgery. 2025. DOI: 10.1016/j.arthro.2025.03.027

[17] Circumferential Arthroscopic Capsular Release: Reflections and a Historical Perspective. Arthroscopy. 2012. DOI: 10.1016/j.arthro.2012.10.003

[18] Effect of Capsular Release in the Treatment of Shoulder Stiffness Concomitant With Rotator Cuff Repair. The American Journal of Sports Medicine. 2014. DOI: 10.1177/0363546513519326

[19] Is the Extended Release of the Inferior Glenohumeral Ligament Necessary for Frozen Shoulder?. Arthroscopy. 2010. DOI: 10.1016/j.arthro.2010.02.020

[20] Clinical outcome of arthroscopic capsular release for frozen shoulder: essential technical points in 255 patients. Journal of Orthopaedic Surgery and Research. 2018. DOI: 10.1186/s13018-018-0758-5

[21] Arthroscopic Capsular Release: A Prospective Double-Blind Randomized Study Comparing Two Types of Rehabilitation Regime. A Pilot Study. Shoulder & Elbow. 2009. DOI: 10.1111/j.1758-5740.2009.00025.x

[24] Improvement in quality of life after arthroscopic capsular release for contracture of the shoulder. The Bone & Joint Journal. 2013. DOI: 10.1302/0301-620x.95b7.31197

[25] Treatment of Adhesive Capsulitis of the Shoulder. Journal of the American Academy of Orthopaedic Surgeons. 2019. DOI: 10.5435/jaaos-d-17-00606

[26] Effect of nonoperative concomitant intraarticular pathologies on the outcome of arthroscopic capsular release for adhesive capsulitis of the shoulder. Acta Orthopaedica et Traumatologica Turcica. 2020. DOI: 10.1016/j.aott.2018.04.002

[27] Incidence and Treatment of Postoperative Stiffness Following Arthroscopic Rotator Cuff Repair. Arthroscopy. 2009. DOI: 10.1016/j.arthro.2009.01.018

[28] Posterior Arthroscopic Capsular Release in Frozen Shoulder. Arthroscopy. 2008. DOI: 10.1016/j.arthro.2008.08.006

[29] Comparison of arthroscopic capsular release in diabetic and idiopathic frozen shoulder patients. Archives of Orthopaedic and Trauma Surgery. 2009. DOI: 10.1007/s00402-009-0900-2

[33] Does the timing of surgical intervention impact the clinical outcomes and overall duration of symptoms in frozen shoulder?. Journal of Shoulder and Elbow Surgery. 2021. DOI: 10.1016/j.jse.2020.07.023

[34] Limited capsular release and controlled manipulation under anaesthesia for the treatment of frozen shoulder. Shoulder & Elbow. 2015. DOI: 10.1177/1758573215578590

[36] Clinical Outcomes Do Not Support Arthroscopic Posterior Capsular Release in Addition to Anterior Release for Shoulder Stiffness. The American Journal of Sports Medicine. 2014. DOI: 10.1177/0363546514523720

[38] Arthroscopic isolated capsular release for shoulder contracture after brachial plexus birth palsy: clinical outcomes in a prospective cohort of 28 children with 2 years' follow-up. Journal of Shoulder and Elbow Surgery. 2018. DOI: 10.1016/j.jse.2018.01.022

[40] Rockwood And Matsen S The Shoulder. Arthroscopic Management of Prearthritic and Arthritic Conditions of the Shoulder and the Postarthroplasty Shoulder > Radiographic Evaluation.

[41] Campbell S Operative Orthopaedics 4 Volume Set. ARTHROSCOPIC REPAIR OF POSTERIOR HUMERAL AVULSION OF THE GLENOHUMERAL LIGAMENT > CAPSULAR RELEASE > BOX 52.3.

[43] Miller S Review Of Orthopaedics. SECTION 16 PATELLAR TRACKING IN TOTAL KNEE ARTHROPLASTY > SHOULDER STIFFNESS > 1. A stiff shoulder may be posttraumatic, postsurgical, or the result of adhesive capsulitis.

[44] Miller S Review Of Orthopaedics. SHOULDER STIFFNESS > 1. A stiff shoulder may be posttraumatic, postsurgical, or the result of adhesive capsulitis.

[48] Rockwood And Matsen S The Shoulder. Arthroscopic Management of Prearthritic and Arthritic Conditions of the Shoulder and the Postarthroplasty Shoulder > Operative Treatment.

[51] Arthroscopic capsular release is more effective in pain relief than conservative treatment in patients with frozen shoulder. BMC Musculoskeletal Disorders. 2024. DOI: 10.1186/s12891-024-07275-7

[52] Arthroscopic capsular release for refractory shoulder stiffness: A critical analysis of effectiveness in specific etiologies. Journal of Shoulder and Elbow Surgery. 2010. DOI: 10.1016/j.jse.2009.08.004

[56] A Lange Medical Book Current Diagnosis Treatment In Orthopedics Fifth Edition. 2Musculoskeletal Trauma Surgery > SHOULDER AND ARM INJURIES.

[58] Aaos Comprehensive Orthopaedic Review 3. Anatomy of the Shoulder, Arm, and Elbow > I. Shoulder.

[59] Rockwood And Matsen S The Shoulder. Developmental Anatomy of the Shoulder and Anatomy of the Glenohumeral Joint > Bursae.

[61] Rockwood And Matsen S The Shoulder. Developmental Anatomy of the Shoulder and Anatomy of the Glenohumeral Joint > EDITOR COMMENTARY.

[62] Rockwood And Matsen S The Shoulder. Fractures, Dislocations, and Acquired Problems of the Shoulder in Children > FRACTURES OF THE PROXIMAL HUMERUS.

[67] Campbell S Operative Orthopaedics 4 Volume Set. RECONSTRUCTIVE PROCEDURES OF THE SHOULDER AND ELBOW IN ADULTS > ANATOMY AND BIOMECHANICS.

[69] Miller S Review Of Orthopaedics. Genetics of musculoskeletal conditions and abnormalities are summarized in Table 1.27 > UPPER EXTREMITY > SHOULDER.

[72] Apley And Solomon S Concise System Of Orthopaedics And Trauma. INVESTIGATION.

[76] Rockwood And Green S Fractures In Adults. 29: Principles of Nonunion and Bone Defect Treatment > Magnetic Resonance Imaging and Arthrography.

[78] Orthopaedic Knowledge Update 13 Ebook Without Multimedia. Shoulder Anatomy and Biomechanics, Clinical Evaluation, Imaging > Clinical Evaluation > Imaging.

[79] Role of matrix metalloproteinases 2 and 9 in the development of frozen shoulder: human data and experimental analysis in a rat contracture model. Journal of Shoulder and Elbow Surgery. 2019. DOI: 10.1016/j.jse.2018.11.072

[81] Aaos Comprehensive Orthopaedic Review 3. Imaging of the Shoulder and Elbow > I. Shoulder.

[91] Rockwood And Matsen S The Shoulder. Arthroscopic Treatment of Shoulder Stiffness and Rotator Cuff Calcific Tendinitis > Arthroscopic Treatment.

[95] A randomized controlled trial of arthroscopic capsular release versus hydrodilatation in the treatment of primary frozen shoulder. Journal of Shoulder and Elbow Surgery. 2018. DOI: 10.1016/j.jse.2018.04.002

[99] Adhesive capsulitis of the shoulder: protocol for the adhesive capsulitis biomarker (AdCaB) study. BMC Musculoskeletal Disorders. 2019. DOI: 10.1186/s12891-019-2536-x

[100] Comparative proteome analysis of the capsule from patients with frozen shoulder. Journal of Shoulder and Elbow Surgery. 2018. DOI: 10.1016/j.jse.2018.03.010

[102] Interventional microadhesiolysis: A new nonsurgical release technique for adhesive capsulitis of the shoulder. BMC Musculoskeletal Disorders. 2008. DOI: 10.1186/1471-2474-9-12

[104] Posterior Glenohumeral Joint Capsule Contracture. Shoulder & Elbow. 2012. DOI: 10.1111/j.1758-5740.2012.00180.x

[106] Three-dimensional comparative strain analysis of the capsuloligamentous complex during passive glenohumeral motion. Journal of Orthopaedic Surgery and Research. 2025. DOI: 10.1186/s13018-025-06548-8

[110] Arthroscopic Arthrolysis for Recalcitrant Frozen Shoulder: A Lateral Approach. Arthroscopy. 2012. DOI: 10.1016/j.arthro.2011.12.014

[114] Arthroscopic 360° Capsular Release for Adhesive Capsulitis in the Lateral Decubitus Position. Arthroscopy Techniques. 2016. DOI: 10.1016/j.eats.2016.05.007

[116] Atraumatic Dislocation After Arthroscopic Capsular Release in a Patient With Pseudocholinesterase Deficiency. JAAOS: Global Research and Reviews. 2025. DOI: 10.5435/jaaosglobal-d-24-00135

[117] Arthroscopic capsular release of the elbow. Journal of Shoulder and Elbow Surgery. 2010. DOI: 10.1016/j.jse.2010.01.003

[121] Magnetic resonance imaging features for diagnosing adhesive capsulitis of the shoulder: a systematic review and meta-analysis. BMC Musculoskeletal Disorders. 2025. DOI: 10.1186/s12891-025-08592-1

[122] Arthroscopic capsular release for posttraumatic shoulder stiffness. Journal of Shoulder and Elbow Surgery. 2008. DOI: 10.1016/j.jse.2007.11.014

[126] Myofibroblast Upregulators are Elevated in Joint Capsules in Posttraumatic Contractures. Clinical Orthopaedics & Related Research. 2007. DOI: 10.1097/blo.0b013e3180312c01

[134] What Is the Right Timing for Arthroscopic Capsular Release of a Frozen Shoulder? Letter to the Editor. Orthopaedic Journal of Sports Medicine. 2020. DOI: 10.1177/2325967120903710

[138] Complications following arthroscopic Bankart repair: a systematic review. Journal of Shoulder and Elbow Surgery. 2024. DOI: 10.1016/j.jse.2023.08.013

[141] Primary frozen shoulder: brief review of pathology and imaging abnormalities. Journal of Orthopaedic Science. 2014. DOI: 10.1007/s00776-013-0495-x

[143] Advances in Wrist Arthroscopy. Journal of the American Academy of Orthopaedic Surgeons. 2012. DOI: 10.5435/jaaos-20-11-725

[144] Second-look arthroscopic evaluation of transferred graft integrity during capsular release on patient with adhesive capsulitis after lower trapezius tendon transfer: a case report. JSES Reviews, Reports, and Techniques. 2024. DOI: 10.1016/j.xrrt.2023.12.002

[152] Arthroscopic capsular release for frozen shoulder: when etiology matters. Knee Surgery, Sports Traumatology, Arthroscopy. 2023. DOI: 10.1007/s00167-023-07561-2

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