Osseous Bankart Lesion Research Articles

Spectrum and patterns of shoulder pathology on MRI in symptomatic elite wheelchair basketball athletes.

Wheelchair basketball (WCB) is a popular para-sport adapted for athletes with physical disabilities. Shoulder injuries are commonly reported among WCB athletes. However, the understanding of the specific patterns and characteristics of shoulder injuries in WCB players is currently limited, and there is a lack of comprehensive literature available on this subject. To investigate the spectrum of pathologies observed in elite wheelchair basketball (WCB) athletes referred for MRI evaluation of symptomatic injuries of the shoulder. Retrospective review of consecutive elite WCB athletes referred for MRI evaluation of symptomatic shoulder injury. Demographic, clinical, and functional data including international wheelchair basketball federation (IWBF) classification of each athlete were collected. A total of 28 MRI studies were reviewed. Excluding MRI examinations of the same shoulder, 18 study cases were assessed for pathology of the rotator cuff (RC), labrum, long-head of biceps tendon, glenohumeral and acromioclavicular joints, and osseous lesions of the humerus or glenoid. Correlations between clinical-demographic features and MRI findings were statistically evaluated. Supraspinatus tears were observed in 72.2%, infraspinatus tears in 50%, and subscapularis tears in 38.9% shoulders. Articular-sided partial tears frequently involved posterior supraspinatus (88.9%) and anterior infraspinatus (100%). Labral tears were seen in 38.9%, with involvement of the posterosuperior labrum in all tears. Hill-Sachs and osseous Bankart lesions (5.6%), and anterior-inferior labral tears (11.1%), were uncommon findings. Statistically significant correlations were observed of low IWBF point class and non-ambulatory athletes with subscapularis tendinosis (p = 0.015, p = 0.001) and tearing (p = 0.050, p = 0.013), and athletes with limited trunk control with subscapularis tendinosis (p = 0.013). RC tears are common in elite WCB athletes with pattern of RC and labral tearing suggesting internal (superior-posterior) impingement as a contributory pathoetiologic mechanism. Non-ambulatory, low IWBF point class athletes, as well as those with limited trunk control have a statistically significant increase in subscapularis tendon pathology on MRI.

Arthroscopic Bankart repair with peeling osteotomy of the anterior glenoid rim preserves glenoid morphology.

A decrease in the glenoid size after arthroscopic Bankart repair (ABR) was common in shoulders without osseous fragments compared with those with osseous fragments. For cases of chronic recurrent traumatic anterior glenohumeral instability without osseous fragments, we have performed ABR with peeling osteotomy of the anterior glenoid rim (ABRPO) to make an intentional osseous Bankart lesion. The aim of this study was to compare the glenoid morphology after ABRPO with it after simple ABR. The medical records of patients who underwent arthroscopic stabilization for chronic recurrent traumatic anterior glenohumeral instability were retrospectively reviewed. Patients with an osseous fragment, with revision surgery and without complete data were excluded. Patients were assigned to 1 of 2 groups: Group A, ABR without peeling osteotomy procedure or Group B, with ABRPO procedure. Computed tomography was performed preoperatively and 1year after surgery. The size of the glenoid bone loss was investigated by the assumed circle method. The following formula was used to calculate the decreased size of the glenoid: (Δ) = (postoperative size of the glenoid bone loss) - (preoperative size of the glenoid bone loss). The size of the glenoid 1year after surgery was assessed to determine if it had decreased (Δ>0%) or not decreased (Δ≤0%) relative to the preoperative size. This study evaluated 39 shoulders divided into 2 groups: 27 shoulders in Group A and 12 shoulders in Group B. In Group A, postoperative glenoid bone loss was significantly greater than preoperative glenoid bone loss (7.8±6.2 vs. 5.5±5.3, respectively, P=.02). In Group B, postoperative glenoid bone loss was significantly lower than preoperative glenoid bone loss (5.6±5.4 vs. 8.7±4.0, respectively, P=.02). The P value for the interaction of group (A or B) × time (preoperative or postoperative) was 0.001. The decreased size of the glenoid was significantly larger in Group A than in Group B (2.1±4.2 vs. -3.1±4.5, respectively, P=.001). The rate of shoulders in which the size of the glenoid decreased 1year after surgery relative to the preoperative size was significantly higher in Group A than in Group B (63% [17/27] vs. 25% [3/2], respectively, P=.04). The study showed that ABRPO preserved the glenoid size better than simple ABR without a peeling osteotomy procedure.

Arthroscopic Reduction and Internal Fixation of an Osseous Bankart Lesion.

The current surgical video article outlines a technique for an osseous Bankart repair in a patient with a displaced fracture as well as substantial pain and instability. First, the amount of bone loss is measured on 3-dimensionally reconstructed computed tomography (CT) imaging, with the humeral head digitally subtracted2. The procedure is then performed arthroscopically with the patient in the lateral decubitus position. A diagnostic evaluation, beginning with posterior and anterior portal placement in the rotator interval, is completed to assess any rotator cuff injury and the extent of labral tearing and osseous displacement. Next, the bone fragment is elevated into its anatomical position. This fragment is then reduced with use of a double-row suture technique, followed by concomitant capsulolabral repair. Nonoperative treatment with a sling can be utilized as long as post-reduction CT scans reveal anteroposterior centering of the humeral head on the glenoid3. Rehabilitation can include active-assisted and passive glenohumeral mobilization, as well as daily pendulum exercises and physiotherapy. Osseous Bankart repair has been shown to effectively improve patient-reported outcomes and normalize glenoid morphology1,3,4. Failure to recognize and appropriately treat an osseous Bankart fracture may lead to osseous erosion caused by repetitive episodes of subluxations or dislocations, along with substantial pain and weakness5. Indications for arthroscopic Bankart repair include young, active patients with a reducible fracture fragment, an anterior glenoid deficit of >10%, and a history of failed nonoperative treatment3-8. Clinical outcomes following the osseous Bankart repair procedure have been shown to be highly successful, with high rates of return to sport, minimal reduction in range of motion, and restoration of shoulder function and stability4. Additionally, long-term follow-up has shown successful osseous union and normalization of glenoid anatomy1. Apply tension to sutures with a suture retriever before the PushLock anchors (Arthrex) are placed during fracture reduction.Utilize a trans-subscapularis portal for anchor placement medial to the fracture on the glenoid neck.Perform adjustable tensioning during labral repair with knotless all-suture anchors.Utilize a lateral distraction device with the patient in the lateral decubitus position to completely visualize the anteroinferior glenoid.Chronic onset and late intervention may cause difficulties in the reduction of the bone fragment.Suture management may be difficult, particularly for surgeons at an early stage of the learning curve.A defect that is wide (from medial to lateral) may be difficult to maneuver around and reduce. GH = glenohumeralGHL = glenohumeral ligamentPts = patientsPMH = previous medical historyFE = forward elevationER = external rotationIR = internal rotationABD = abductionEXT = external rotationXR = radiographic imagingMRI = magnetic resonance imagingCT = computed tomographyROM = range of motionFU = follow-upRTS = return to sportsRTPP = return to previous level of play.

Arthroscopic Bankart Repair and Open Bristow Procedure in the Treatment of Anterior Shoulder Instability With Osseous Glenoid Lesions in Collision Athletes.

Background:Traumatic anterior shoulder instability in collision sports athletes often involves osseous glenoid lesions, which make surgical treatment challenging. High redislocation rates have been seen in collision sports athletes treated using arthroscopic Bankart repair.Purpose:To investigate the effectiveness of a combined arthroscopic Bankart repair and open Bristow procedure for the treatment of traumatic anterior shoulder instability in collision sports athletes, with a focus on osseous glenoid lesions.Study Design:Case series; Level of evidence, 4.Methods:We reviewed 149 shoulders in 141 competitive collision sports athletes (mean ± standard deviation age, 20.1 ± 4.1 years; 8 bilateral cases) who underwent a combined arthroscopic Bankart repair and open Bristow procedure with minimum 2 years of follow-up. Osseous Bankart lesions were arthroscopically reduced and fixed using a coracoid graft.Results:Clinical outcomes as indicated by mean Rowe score improved significantly from 50.0 preoperatively to 98.9 postoperatively (P < .001) at a median follow-up of 3.4 years (range, 2.5-7 years). There were 2 recurrent dislocations (1.3%), both of which had nonunion of the transferred coracoid. Osseous Bankart lesions were observed in 85 shoulders, and osseous glenoid lesions ≥10% of the diameter of the nonoperative side were found in 58 shoulders, including 24 off-track cases. Clinical outcomes were not significantly different between patients with a glenoid defect ≥10% and <10%. Nonunion of the transferred coracoid was observed in 16 shoulders (10.7%), which had inferior Rowe scores; however, we could not define any risk factors for nonunion, including patient characteristics or bone morphology. Postoperative computed tomography performed in 29 patients >1 year after surgery showed successful repair of the osseous glenoid lesions, with a restored glenoid articular surface in all cases. Significant pre- to postoperative increases were seen in glenoid diameter (mean, 13.1% [95% CI, 9.9%-16.3%]; P < .001) and area (mean, 10.6% [95% CI, 8.5%-12.7%]; P < .001).Conclusion:A combined arthroscopic Bankart repair and open Bristow procedure improved bone morphology and was a reliable surgical method for treating collision sports athletes with traumatic anterior shoulder instability involving osseous glenoid lesions.

The Bony Bankart Lesion: How to Measure the Glenoid Bone Loss.

SummaryAn osseous Bankart lesion is commonly seen in patients with an anterior shoulder dislocation. It is defined as a detachment of the anteroinferior labrum associated with a glenoid rim fracture. Radiological studies are crucial not only for detecting glenoid bone defects but also for measuring the amount of bone loss. The precise quantification of the bony defect is crucial for the therapeutic desicion-making and clinical outcomes. Although we know that major glenoid bone loss requires surgical intervention, none of the studies performed so far answered the question what size of the defect should be an indication for open surgery procedures. Moreover, there is still no consensus on the exact percentage of glenoid loss that results in a higher risk of re-dislocations. In our opinion, there is a strong need for a consensus on universally accepted measuring techniques of the glenoid defect as well as on algorithms with validated glenoid bone loss threshold values for therapeutic decision-making. In this study, we review the techniques described so far in the literature and try to assess if any of these techniques should be treated as a leading method of detecting and quantifying osseous glenoid lesions.

Advanced imaging of glenohumeral instability: the role of MRI and MDCT in providing what clinicians need to know.

The inherently unstable anatomy of glenohumeral (GH) joint predisposes it to shoulder dislocation. Shoulder dislocation can occur either due to acute trauma or due to chronic microtraumas in the setting of underlying morphological abnormality. A plain radiograph is the initial imaging modality for diagnosis and management of shoulder dislocation and its associated osseous abnormalities such as Hill-Sachs deformity or osseous Bankart lesion. However, advanced imaging techniques such as multidetector CT (MDCT) with three-dimensional (3D) volume rendering and MRI can be helpful in further characterization of osseous abnormalities and detection of associated soft tissue injuries, respectively. These additional findings may be useful for optimal surgical repair for GH joint stabilization. In this pictorial essay, we present the clinically relevant osseous and soft tissue pathologies in various types of shoulder dislocation, with emphasis on pathologies that can be demonstrated using advanced imaging examinations. Discussed pathologies include glenoid fractures, labral tears, Bankart lesion, Hill-Sachs defect, Perthes lesion, anterior labral posterior sleeve avulsion (ALPSA), glenolabral articular disruption (GLAD), humeral avulsion of the glenohumeral ligament (HAGL), Kim lesion, and other associated soft tissue and nerve injuries.

Arthroscopic Osseous Bankart Repair in the Treatment of Recurrent Anterior Glenohumeral Instability.

Anterior glenohumeral instability associated with an anterior-inferior fracture of the glenoid (osseous Bankart lesion) can be treated successfully with arthroscopic, rather than open, surgical repair, or fixation of the osseous fragment. Place the patient in the beach-chair position and examine both shoulders for laxity after induction of general anesthesia with an interscalene block. Create a standard posterior viewing portal and anterior and anterosuperior working portals. Separate the displaced osseous fragment associated with the labroligamentous complex from the glenoid neck and mobilize the labroligamentous complex together with the fragment up to the 7 o'clock or 7:30 position (in a right shoulder). Perform an inferior labrum repair by inserting 2 suture anchors at the anteroinferior part of the glenoid face. Fix the osseous fragment by passing the sutures either through or around the fragment with use of a bone penetrator, or Bone Stitcher, while stabilizing the labrum and fragment with a large grasper. Rotator interval closure, done with the arm in >60° of external rotation, is the most frequently performed augmentation procedure. A consecutive series of 46 patients with an osseous Bankart lesion who demonstrated >15% glenoid bone loss underwent osseous Bankart repair, which was performed regardless of the fragment size, between January 2005 and December 20061.

Morphometrical study of scapular glenoid cavities

Shape and dimensions of the glenoid cavity are important in the design and fitting of glenoid components for total shoulder arthroplasty. An understanding of variations in normal anatomy of the glenoid is essential while evaluating pathological conditions like osseous bankart lesions and osteochondral defects. In the present study done on 224 dry scapulae, three glenoid diameters were measured. The average superior-inferior diameter on right and the left side were 33.68±4.32mm and 32.09±4.11mm respectively. The average anterior-posterior diameter of the lower half of the right glenoid was 23.29±2.34mm and that of the left glenoid was 24.90±2,95mm. the mean diameter of the upper half of the right glenoid was 15.74±1.75mm and that of the left glenoid was 16.81±1.74mm. The left glenoid cavity was slightly shorter in length, but broader especially in the upper part as compared to the left glenoid cavity. The current study also recorded a higher percentage of glenoid cavities having the glenoid notch in the anterior margin of the glenoid as compared to earlier studies. While evaluating defects and lesions of the glenoid, this fact could be useful. GJMR-H Classification: WE 168, WS 270

The Comparison of Results of Early and Late Rehabilitation Following Arthroscopic Bankart Repair with Knotless Anchor in Recurrent Traumatic Anterior Shoulder Dislocation

Objectives:The aim of this study was to compare the clinical and functional results of early and late rehabilitation of patients who had undergone arthroscopic Bankart repair with knotless anchor for recurrent shoulder dislocation and to define the most appropriate rehabilitation time and the effect of this on recurrence.Methods:34 patients (32 male and 2 female) were included in this study. The patients were diagnosed with recurrent anterior shoulder dislocation with Bankart lesion in our institution. The exclusion criteria in this study were multi-directional shoulder instability, wide osseous Bankart lesion, wide Hill-Sachs lesion or rotator cuff tear. All patients underwent arthroscopic Bankart repair. Knotless anchor was used in all patients. The patients were grouped into 2 groups postoperatively according to the immobilization period and rehabilitation regimen. Both groups equally consisted of 17 patients. (Group 1; early rehabilitation group, Group 2; late rehabilitation group) All patients were examined retrospectively. Gender, age, dislocated side, dominant hand, recurrence, presence of additional pathologies, time of first and last dislocations preoperatively and numbers of dislocations were the demographic data recorded. At the final follow-up; the restriction in external rotation was measured by comparative goniometry and clinical evaluation was made using the Constant and Rowe scores. One-sample T-test, Mann-Whitney U Test, Crosstabs Chi Square Test and Shapiro-Wilk Tests used for statistical analysis.Results:The mean age of the patients in Group 1 was found to be 25.1 ± 6.5 ( 17-43) years and in Group 2, 30.8 ± 6.8 (21-46) years. After a mean follow-up period of 14.7 months, no patients in Group 1 experienced a recurrence, whereas in Group 2 over the mean follow-up period of 38.5 months, there was dislocation, following episodes of subluxation, in only 1 patient (5.8%). When the parameters of first dislocation, last dislocation and number of dislocations were evaluated separately in two groups, no statistical difference was observed between the groups in the relevant parameters (n.s.). A statistically significant difference was determined between the groups in respect to the restriction in external rotation (p<0.05). There was no statistically significant difference between the groups in respect to the Constant and Rowe scores (n.s.).Conclusion:The most important result of this study was that the early beginning of rehabilitation yielded less external rotation restriction than late beginning of rehabilitation. The absence of recurrence in the group of early beginning of rehabilitation reminds the question “does early rehabilitation reduce recurrence rates?” The findings in this study should be confirmed with further prospective, randomized and longer follow-up studies.

Biomechanical Comparison of Arthroscopic Single- and Double-Point Repair Techniques for Acute Bony Bankart Lesions

Objectives:Single-point and double-point arthroscopic reconstruction techniques for acute osseous Bankart lesions have been described in the literature. We hypothesized that the double-point fixation technique (bony Bankart bridge) would provide superior fracture reduction and stability at time zero compared to the single-point technique in a cadaveric bony Bankart model.Methods:Testing was performed on 14 matched glenoid pairs with simulated bony Bankart fractures; the defect width was 25% of the glenoid diameter and the fracture was perpendicular to the 3 o’clock position. Additionally, a labral avulsion was created and extended from the 6 to the 12 o’clock position. All labral avulsions were then repaired above and below the bony Bankart with suture anchors. Half of the bony Bankart fractures were repaired with a double-point technique, while the contralateral glenoid was repaired with a single-point technique (Fig 1). Following the repairs, distance between the intra-articular surfaces of the fragment and glenoid were measured for an unloaded condition and with 10 N of tension applied to the fragment, to quantify fracture displacement. To determine the biomechanical stability of the repairs, specimens were secured in a tensile testing machine and aligned so that the load vector was 30° medial to the superior-inferior plane. The repair constructs were preconditioned with sinusoidal cyclic loading between 5 N to 25 N for 10 cycles and then pulled to failure at a rate of 5 mm/min. Load (N) at 1 mm and 2 mm of fracture displacement were determined. Non-parametric statistics were used (MWU).Results:The bony Bankart defect length measured more than half of the maximum antero-posterior diameter of the inferior glenoid in all specimens. Loads at 1 mm and 2 mm of fracture displacement, and fracture reduction are reported in Table 1. The double-point technique required significantly higher forces to achieve fracture displacements of 1 mm (mean: 60.6 N, range: 39.0 N to 93.3 N; p = 0.001) and 2 mm (mean: 94.4 N, range: 43.4 N to 151.2 N; p = 0.004) (Fig 1) than the single-point technique (1 mm displacement mean: 30.2 N, range: 14.0 N to 54.1 N; 2 mm displacement mean: 63.7, range: 26.6 to 118.8). Fracture displacement was significant lower after double-point repair for both the unloaded condition (mean: 1.1 mm, range: 0.3 to 2.4 mm; p = 0.005) (Fig 1) and in response to a 10 N anterior force applied to the defect (mean: 1.6 mm, range: 0.5 to 2.7 mm; p = 0.001) compared to single-point repair (unloaded mean: 2.1 mm, range: 1.3 to 3.4 mm; loaded mean: 3.4, range: 1.9 to 4.7 mm).Conclusion:The double-point fixation technique (bony Bankart bridge) for clinically relevant sized, acute osseous Bankart lesions resulted in lower fracture displacement and superior stability at time zero in comparison to the single-point technique and was the preferred biomechanical technique in this model of bony Bankart fractures. This information may influence the surgical technique used to treat large osseous Bankart fractures and the postoperative rehabilitation protocols implemented when such repair techniques are used.

Arthroscopic Double-Row Anterior Stabilization and Bankart Repair for the “High-Risk” Athlete

In addition to operative intervention for the patient with recurrent shoulder instability, current literature suggests that younger athletic patients unwilling to modify their activities may benefit from an early surgical shoulder stabilization procedure. Although open shoulder stabilization clearly has a role to play in some cases, we believe that further optimization of arthroscopic fixation techniques may allow us to continue to refine the indications for open stabilization. In particular, when an arthroscopic approach is used for capsulolabral repair in relatively high-risk groups, it may be beneficial to use a double-row repair technique. We describe our technique for shoulder stabilization through double-row capsulolabral repair of a soft-tissue Bankart lesion in the high-risk patient with shoulder instability or the patient with a small osseous Bankart lesion.

Recurrent anterior shoulder instability: Review of the literature and current concepts.

The purpose of this review article is to discuss the clinical spectrum of recurrent traumatic anterior shoulder instability with the current concepts and controversies at the scientific level. Because of increasing participation of people from any age group of the population in sports activities, health care professionals dealing with the care of trauma patients must have a thorough understanding of the anatomy, patho-physiology, risk factors, and management of anterior shoulder instability. The risk factors for recurrent shoulder dislocation are young age, participation in high demand contact sports activities, presence of Hill-Sachs or osseous Bankart lesion, previous history of ipsilateral traumatic dislocation, ipsilateral rotator cuff or deltoid muscle insufficiency, and underlying ligamentous laxity. Achieving the best result for any particular patient depends on the procedure that allows observation of the joint surfaces, provides the anatomical repair, maintains range of motion, and also can be applied with low rates of complications and recurrence. Although various surgical techniques have been described, a consensus does not exist and thus, orthopedic surgeons should follow and try to improve the current evidence-based treatment modalities for the patients.

Evaluation of a treatment algorithm for acute traumatic osseous Bankart lesions resulting from first time dislocation of the shoulder with a two year follow-up

BackgroundStudies dealing with acute osseous Bankart lesions and corresponding treatment strategies are rare. The purpose of this study is to analyze the results after applying our treatment algorithm for acute glenoid rim fractures caused by first time traumatic anterior shoulder dislocations.Methods25 patients were included in this retrospective case series. All patients sustained a first time shoulder dislocation caused by ski or snowboard accidents. An osseous Bankart lesion was detected in all shoulders. Operative therapy was performed in patients with osseous defects of 5% or more, otherwise conservative therapy was initiated. Primary study outcome parameter was the Rowe score. Additionally, the outer rotation deficit and operative complications were analysed.Results12 patients showed a defect size of less than 5% and were treated conservatively. The average lesion size was 2%. For these patients, the Rowe score was excellent in 58%, good in 25%, and moderate in 17% of patients. Three patients (25%) complained about a feeling of instability. 13 patients had a lesion size of more than 5%, average 15%, and were treated operatively. The Rowe score for this group was excellent in 54%, good in 31%, and moderate results in 15% of patients. One patient (8%) complained about a feeling of instability, without recurrent dislocations. There were no statistically significant differences between both study groups (ROWE score: p = 0.98).ConclusionsApplying our treatment algorithm for acute osseous Bankart lesions consisting of a conservative strategy for small defect sizes and a surgical approach for medium-sized and large defects leads to encouraging mid-term results and a low rate of recurrent instability in active patients.

Bridge Over Troubled Water: An Arthroscopic Option for the Treatment of Anterior Instability Associated with an OsseousBankart Lesion

Bridge Over Troubled Water: An Arthroscopic Option for the Treatment of Anterior Instability Associated with an OsseousBankart Lesion

Combined Posterior Osseous Bankart Lesion and Posterior Humeral Avulsion of the Glenohumeral Ligaments

The pathoanatomy of anterior shoulder dislocations has been well documented. Perthes1 described an anterior labral lesion as early as 1906, and Bankart2 wrote his classic article on recurrent anterior dislocations more than seventy years ago. Until recently, much less had been written about posterior shoulder instability; to our knowledge, the first case series was reported by Reeves3 in 1963. Recurrent posterior glenohumeral joint instability is far less common than anterior instability, accounting for approximately 2% to 10% of all cases of shoulder instability4. Pathoanatomic findings in patients with unidirectional posterior instability include a posterior Bankart lesion, posterior humeral avulsion of the glenohumeral ligament (PHAGL), and various combinations of the two5,6. In their article on humeral avulsion of the glenohumeral ligament (HAGL), Bui-Mansfield et al.7 defined the floating posterior inferior glenohumeral ligament (floating PIGHL) as a combined posterior Bankart lesion and PHAGL. Multiple cases of this lesion have been reported in the literature7-11. To our knowledge, there has been no reported case of the specific combination of a posterior osseous Bankart lesion and a PHAGL injury. We present a case of recurrent posterior instability associated with a combined PHAGL injury and posterior osseous Bankart lesion. We also describe four pathoanatomic subtypes of floating PIGHL lesions. The patient was informed that data concerning his case would be submitted for publication, and he provided consent. A twenty-three-year-old left-hand-dominant man fell while snowboarding three years prior to presentation and sustained a left shoulder dislocation. He was not certain about the direction of the dislocation. He was able to relocate the shoulder on the mountain with the help of friends and the ski patrol. Initially, he was managed nonoperatively with a sling and physical therapy as well as a progressive return …

Pathoanatomy of First-Time, Traumatic, Anterior Glenohumeral Subluxation Events

Relative to dislocations, glenohumeral subluxation events have received little attention in the literature, despite a high incidence in young athletes. The pathoanatomy of first-time, traumatic, anterior subluxation events has not been defined, to our knowledge. As part of a prospective evaluation of all cases of shoulder instability sustained during one academic year in a closed cohort of military academy cadets, a total of thirty-eight first-time, traumatic, anterior glenohumeral subluxation events were documented. Clinical subluxation events were defined as incomplete instability events that did not require a manual reduction maneuver. Twenty-seven of those events were evaluated with plain radiographs and magnetic resonance imaging within two weeks after the injury and constitute the cohort studied. Magnetic resonance imaging studies were independently evaluated by a musculoskeletal radiologist blinded to the clinical history. Arthroscopic findings were available for the fourteen patients who underwent arthroscopic surgery. Of the twenty-seven patients who sustained a first-time, traumatic, anterior subluxation, twenty-two were male and five were female, and their mean age was twenty years. Plain radiographs revealed three osseous Bankart lesions and two Hill-Sachs lesions. Magnetic resonance imaging revealed a Bankart lesion in twenty-six of the twenty-seven patients and a Hill-Sachs lesion in twenty-five of the twenty-seven patients. Of the fourteen patients who underwent surgery, thirteen had a Bankart lesion noted during the procedure. Of the thirteen patients who chose nonoperative management, four experienced recurrent instability. Two of the thirteen patients left the academy for nonmedical reasons and were lost to follow-up. The remaining seven patients continued on active-duty service and had not sought care for a recurrent instability event at the time of writing. First-time, traumatic, anterior subluxation events result in a high rate of labral and Hill-Sachs lesions. These findings suggest that clinical subluxation events encompass a broad spectrum of incomplete events, including complete separations of the articular surfaces with spontaneous reduction. A high index of suspicion for this injury in young athletes is warranted, and magnetic resonance imaging may reveal a high rate of pathologic changes, suggesting that a complete, transient luxation of the glenohumeral joint has occurred.

Arthroscopic three-point double-row repair for acute bony Bankart lesions

After mobilizing anteroinferior osseous Bankart lesion from the glenoid neck, a suture anchor loaded with differently colored non-absorbable braided sutures is placed on the medial edge in the glenoid neck along the rim fracture through the anterior-inferior trans-subscapularis tendon portal. Two same-colored suture limbs on the anchor are then pulled through the labrum using PDS suture shuttling simultaneously. These steps are repeated for the others suture limbs. The two same-color suture limbs located inferiorly are retrieved using the trans-subscapularis tendon portal. Both suture strands are threaded through the eyelet of a PushLock anchor on the distal end of the driver. The anchor is advanced into the pilot hole completely. These steps are repeated for a second anchor at the upper edge of the fracture in the glenoid rim using the anterior portal. This technique confers effective, firm fixation of the bony Bankart lesion by three-point fixation without the suture material crossing the glenoid cavity.

Acute Traumatic Posterior Shoulder Dislocation: MR Findings

To retrospectively evaluate the appearance of lesions of osseous and soft-tissue structures of the glenohumeral joint on magnetic resonance (MR) images after first-time traumatic posterior shoulder dislocation. The study was institutional review board approved and HIPAA compliant, as appropriate, for the four institutions at which the involved patients were treated. Informed patient consent was obtained, were applicable. Thirty-six male patients (age range, 15-80 years; mean age, 40.2 years) with clinically documented first-time traumatic posterior shoulder dislocation were examined with MR arthrography (18 patients) or conventional shoulder MR imaging (18 patients). Causes of posterior shoulder dislocation were electric shock in one patient, seizure in one patient, and trauma in 34 patients. Hill-Sachs lesions, rotator cuff tears, biceps tendon abnormalities, posterior labrocapsular complex lesions, humeral head translation, and osseous glenoid version angle were evaluated. Spearman rank correlation and Student t test analyses were performed. In 31 (86%) of the 36 patients, a reverse Hill-Sachs lesion was found. Eleven (31%) patients had a reverse osseous Bankart lesion. Twelve full-thickness rotator cuff tears were seen in seven (19%) patients: four supraspinatus tendon, three infraspinatus tendon, and five subscapularis tendon tears. Six (17%) patients had biceps tendon abnormalities. Posterior labrocapsular complex tears were identified in 21 (58%) patients: 10 (48%) with posterior labral sleeve avulsions and 11 (52%) with reverse Bankart lesions. Twenty-seven (75%) patients had a retroverted scaphoglenoid angle (mean, 4.5 degrees ). The mean humeral translation distance relative to the osseous glenoid fossa was -4.8 mm; in 33 (92%) patients, this distance was translated posteriorly. The MR appearance of traumatic posterior shoulder dislocation was characterized by reverse Hill-Sachs lesions in 86% of patients and posterocaudal labrocapsular lesions in nearly 60% of patients. Full-thickness rotator cuff tears were seen in approximately 20% of patients.

Arthroscopic Osseous Bankart Repair for Chronic Recurrent Traumatic Anterior Glenohumeral Instability

BACKGROUND: A chronic osseous Bankart lesion has traditionally been treated with soft-tissue repair and/or open bone-grafting for a large glenoid defect. We developed an arthroscopic method of osseous reconstruction of the glenoid without bone-grafting. The purpose of this study was to evaluate the postoperative outcomes of our technique for chronic recurrent traumatic anterior glenohumeral instability. METHODS: A consecutive series of forty-two shoulders in forty-one patients with chronic recurrent traumatic glenohumeral instability underwent an arthroscopic osseous Bankart repair. All shoulders were evaluated preoperatively with three-dimensionally reconstructed computed tomography, which confirmed an osseous fragment at the anteroinferior portion of the glenoid. The average bone loss in the glenoid was 24.8% (range, 11.4% to 38.6%), and the average fragment size was 9.2% (range, 2.1% to 20.9%) of the glenoid fossa. In all shoulders, a displaced osseous fragment, firmly attached to the labroligamentous complex, was separated from the glenoid neck before reduction and fixation in the optimal position with use of suture anchors. All patients were assessed with use of the scoring systems of Rowe et al. and the University of California at Los Angeles preoperatively and at the final evaluation. RESULTS: The mean duration of follow-up was thirty-four months. At that time, thirty-nine of the forty-two shoulders were rated as having a good or excellent result. The mean Rowe score improved from 33.6 points preoperatively to 94.3 points postoperatively (p < 0.01). The mean score on the University of California at Los Angeles system improved from 20.5 points preoperatively to 33.6 points at the final evaluation (p < 0.01). The average passive external rotation was 75° with the arm at the side and 93° with the arm at 90° of abduction. Two patients had a reinjury. Eventually, thirty-five of thirty-seven patients who were active participants in sports returned to the sport they had played before the injury. CONCLUSIONS: Arthroscopic osseous Bankart repair with use of suture anchors yields a successful outcome even in shoulders with a chronic large glenoid defect.

Arthroscopic Osseous Bankart Repair for Chronic Recurrent Traumatic Anterior Glenohumeral Instability

A chronic osseous Bankart lesion has traditionally been treated with soft-tissue repair and/or open bone-grafting for a large glenoid defect. We developed an arthroscopic method of osseous reconstruction of the glenoid without bone-grafting. The purpose of this study was to evaluate the postoperative outcomes of our technique for chronic recurrent traumatic anterior glenohumeral instability. A consecutive series of forty-two shoulders in forty-one patients with chronic recurrent traumatic glenohumeral instability underwent an arthroscopic osseous Bankart repair. All shoulders were evaluated preoperatively with three-dimensionally reconstructed computed tomography, which confirmed an osseous fragment at the anteroinferior portion of the glenoid. The average bone loss in the glenoid was 24.8% (range, 11.4% to 38.6%), and the average fragment size was 9.2% (range, 2.1% to 20.9%) of the glenoid fossa. In all shoulders, a displaced osseous fragment, firmly attached to the labroligamentous complex, was separated from the glenoid neck before reduction and fixation in the optimal position with use of suture anchors. All patients were assessed with use of the scoring systems of Rowe et al. and the University of California at Los Angeles preoperatively and at the final evaluation. The mean duration of follow-up was thirty-four months. At that time, thirty-nine of the forty-two shoulders were rated as having a good or excellent result. The mean Rowe score improved from 33.6 points preoperatively to 94.3 points postoperatively (p < 0.01). The mean score on the University of California at Los Angeles system improved from 20.5 points preoperatively to 33.6 points at the final evaluation (p < 0.01). The average passive external rotation was 75 degrees with the arm at the side and 93 degrees with the arm at 90 degrees of abduction. Two patients had a reinjury. Eventually, thirty-five of thirty-seven patients who were active participants in sports returned to the sport they had played before the injury. Arthroscopic osseous Bankart repair with use of suture anchors yields a successful outcome even in shoulders with a chronic large glenoid defect.