Shoulder Dislocation Research Articles

Female Patients Undergoing Latarjet Surgery Show Similar 2-Year Secondary Surgery Rates but Greater Risk of Emergency Department Visits Compared With a Matched Cohort of Male Patients

To evaluate sex-based differences in 30-day postoperative emergency department (ED) visits, 90-day complication rates, and 2-year secondary surgery rates after the Latarjet procedure for the treatment of recurrent shoulder instability. A national administrative claims database was used to identify patients with International Classification of Diseases, Tenth Revision (ICD-10) diagnosis codes for shoulder subluxation or dislocation on the day of first-time stabilization with the Latarjet technique between 2015 and 2021. Male patients were matched 4:1 to female patients based on age, Elixhauser Comorbidity Index (ECI) score, and body mass index class. Rates of 30-day ED visits and 90-day complications were compared between cohorts, and risk factors for ED visits were identified by multivariate regression. The incidence of secondary surgery within 2 years was compared by Kaplan-Meier analysis. Prior to matching, 1,059 male and 360 female patients met the inclusion and exclusion criteria. Subsequent 4:1 (male-to-female) matching controlling for age, ECI score, and body mass index yielded 694 male and 185 female patients who underwent the Latarjet procedure. The overall incidence of 30-day ED visits was 9.3%, with an incidence of 8.2% for male patients and 13.5% for female patients. On the basis of multivariate logistic regression, these 30-day ED visits were associated with female sex (odds ratio, 1.79; P= .029) and incrementally higher ECI scores; relative to an ECI score of 0, ECI scores of 1 to 2, 3 to 4, and 5 or greater were associated with odds ratios of 5.31 (P= .006), 8.12 (P < .001), and 12.84 (P < .001), respectively. Ninety-day complications occurred in 1.5% of the total cohort, and the incidence was not statistically different between sexes. Overall, 2-year secondary surgery rates were similar between male and female patients (5.1% and 6.7%, respectively; P= .4). Female patients undergoing the Latarjet procedure for recurrent shoulder instability showed similar 90-day complication and 2-year secondary surgery rates to a matched cohort of male patients. Female sex, along with ECI score, however, was associated with a greater rate of 30-day ED visits. Level III, retrospective comparative case series.

Statistical shape models that predict native glenoid width based on glenoid height are inaccurate in their current form: a cross-sectional study

The extent of measurement errors of statistical shape models that predict native glenoid width based on glenoid height to subsequently determine the amount of anterior glenoid bone loss is unclear. Therefore, the aim of this study was to (1) create a statistical shape model based on glenoid height and width measured on 3-dimensional computed tomography (3D-CT) and determine the accuracy through measurement errors and (2) determine measurement errors of existing 3D-CT statistical shape models. A retrospective cross-sectional study included all consecutive patients who underwent CT imaging before undergoing primary surgical treatment of traumatic anterior shoulder dislocation between 2007 and 2022 at the Tohoku University Hospital and affiliated hospitals. Patients were included when instability was unilateral and CT scans of both the injured and contralateral uninjured shoulder were available. 3D segmentations were created and glenoid height and width of the injured and contralateral uninjured side (gold standard) were measured. Accuracy was determined through measurement errors, which were defined as a percentage error deviation from native glenoid width (contralateral uninjured glenoid), calculated as follows: measurement error = [(estimated glenoid width with a statistical shape model - native glenoid width) / native glenoid width] × 100%. A linear regression analysis was performed to create a statistical shape model based on glenoid height according to the formula: native glenoid width=a × glenoid height+b. The diagnosis and procedure codes identified 105 patients, of which 69 (66%) were eligible for inclusion. Glenoid height demonstrated a very strong correlation (r=0.80) with native glenoid width. The linear regression formula based on this cohort was as follows: native glenoid width=0.75 × glenoid height - 0.61, and it demonstrated an absolute average measurement error of 5%±4%. The formulas by Giles etal, Chen etal and Rayes etal demonstrated absolute average measurement errors of 10%±7%, 6%±5%, and 9%±6%, respectively. Statistical shape models that estimate native glenoid width based on glenoid height demonstrate unacceptable measurement errors, despite a high correlation. Therefore, great caution is advised when using these models to determine glenoid bone loss percentage. To minimize errors caused by morphologic differences, preference goes to methods that use the contralateral side as reference.

Kinematic stabilization after the Latarjet procedure: beyond the triple blocking effect

BackgroundThe rationale for the Latarjet procedure was described as the “triple blocking” effect. Satisfactory surgical outcomes have been reported after surgery. However, it has been reported that the “triple blocking” effect increases joint stability, but it does not fully restore it. Moreover, the procedure is nonanatomic and concerns remain regarding the effects. The study of scapulohumeral rhythm, which is a clinical parameter used for the functional evaluation of shoulder kinematics, can offer new perspectives on the rationale for the procedure. This study aimed to compare the shoulder kinematics of patients after the Latarjet procedure to the shoulders of a healthy population using magnetic and inertial measurement units (MIMUs) with a motion analysis system. MethodsA retrospective study with prospective data collection was conducted on 28 patients who underwent the open Latarjet procedure for recurrent shoulder instability. At a minimum 12-month follow-up, each patient was evaluated by assessing the range of motion (ROM), the Rowe score, and the Constant-Murley score (CMS). Patients were examined using the ShowMotion 3D kinematic tracking system (NCS Lab, Modena, Italy), which uses wireless wearable noninvasive MIMUs sensors to assess the three-dimensional kinematics of the shoulder. For each plane of elevation (i.e., flexion and abduction), the scapulohumeral rhythm (SHR) was described by three scapulothoracic rotations (i.e., protraction–retraction, mediolateral rotation and posterior–anterior tilting) as a function of humeral anteflexion or humeral abduction. ResultsThe mean time from first shoulder dislocation to surgery was 6.6 ± 3 years (range, 1-12 years). No intraoperative complications occurred, and CT performed 3 months after surgery showed graft union in all patients. After a mean follow-up time of 32.4±20 months (range, 12-96), the mean CMS and Rowe scores were 94.5±4.8 (range, 84-100) and 96.7±3.5 (range, 90–100), respectively. All patients showed no signs of glenohumeral arthritis on X-ray examination. Scapular posterior tilt and scapular internal rotation were significantly greater in the patient group than in the healthy population for the flexion–extension and abduction–adduction movements along the whole shoulder range of motion (all p < 0.05); no differences were found in upward/downward scapular rotation. ConclusionA greater scapular posterior tilt and scapular internal rotation were observed after the Latarjet procedure. The modified position of the scapula was maintained during the entire ROM, suggesting a shoulder-stabilizing kinematic effect in addition to the bony, sling and bumper effects.

The Arthroscopic Subscapular Sling Procedure Results in Low Recurrent Anterior Shoulder Instability at 24 Months of Follow-Up

The purpose of this study was to analyze the results of the subscapular sling procedure developed for anterior shoulder instability in patients with less than 10 % anterior glenoid bone loss. The aim was to explore if this procedure would be successful in preventing recurrent shoulder dislocation. Patients were treated surgically with the arthroscopic subscapular sling procedure. A semitendinosus graft was used to reconstruct the anterior labrum and to establish a sling suspension around the upper part of the subscapularis tendon. The patients were followed by x-ray (12 and 24 months). Magnetic resonance imaging (MRI) of the shoulder region and clinical examinations were performed at 3, 12 and 24 months. Recurrent dislocation was the primary endpoint. The Western Ontario Shoulder Instability Index (WOSI) and MRI results were secondary outcome measures. An independent physiotherapist assessed residual instability and ROM. Fifteen patients were included with a dislocation rate of zero % after 24 months follow-up. There was a significant clinical improvement of the WOSI score from 57 % (904) at baseline to 88 % (241) at 24 months (p < 0.001). The proportion of patients with an improvement in the WOSI Total score larger than the estimated Minimal Clinically Important Difference (MCID) was 100% both at 12 and 24 months. MRI showed an intact sling in all patients. External rotation was not significantly reduced (52° at baseline vs 47° at 24 months, p = 0.211). Flexion and abduction were significantly improved from 152° to 174° (p=0.001) and 141° to 170° (p<0.001) after 24 months. The surgical procedures were completed without any intraoperative complications. The subscapular sling procedure resulted in low recurrent shoulder instability and improved patient-reported outcome measures at 24-months follow-up.

Biomechanical and neuromuscular characteristics in patients with traumatic anterior shoulder instability undergoing arthroscopic Bankart repair: a clinical prospective cohort study protocol

IntroductionTraumatic shoulder dislocation is a common shoulder injury, especially among the young and active population. More than 95% of dislocations are anterior, in which the humeral head is forced beyond...

Injury rate and characteristics in Japanese male professional ice hockey players: prospective study of 60 players over 10 seasons

ObjectivesWe aimed to assess the injury rate and characteristics in Japanese male professional ice hockey players.MethodsThis study involved an inclusive cohort of male ice hockey players from a Japanese professional...

CORR Insights®: Is Ultrasound-guided or Landmark-guided Intra-articular Lidocaine Injection More Effective for Pain Control in Anterior Shoulder Dislocation Reduction? A Randomized Controlled Trial.

CORR Insights®: Is Ultrasound-guided or Landmark-guided Intra-articular Lidocaine Injection More Effective for Pain Control in Anterior Shoulder Dislocation Reduction? A Randomized Controlled Trial.

Exploring temporal trends and burden of traumatic shoulder dislocation: a global perspective.

To explore the geographical and temporal trends of traumatic shoulder dislocation, describe the association between the social and demographic factors and the health burden due to traumatic shoulder dislocation, and further investigate its causes. Data on traumatic shoulder dislocation was collected from the Global Burden of Disease 2019, spanning the years 1990 to 2019. The epidemiology and disease burden were examined at global, regional, and national levels. Additionally, the age and gender patterns were analyzed, followed by an investigation into the primary causes. Lastly, the study studied the correlation between age-standardized rates and the socio-demographic index (SDI). Over a span of 30 years, both the crude and age-standardized rates of incidence and years lived with disability (YLDs) rates for all genders displayed a slight fluctuating downward trend. The incidence and YLDs rates in males were consistently higher than those in females. The study analyzed both incidence and YLDs rates of the global, regional, and national of traumatic shoulder dislocations from 1990 to 2019, as well as the temporal trends. Among males, the highest incidence rate was observed in young adulthood, while females exhibited the highest incidence rate in old age. This pattern was mirrored in the YLDs rate. Falls were identified as the main cause contributing to the disease burden related to traumatic shoulder dislocations. Moreover, a positive correlation was found between the age-standardized rates and SDI. The disease burden of traumatic shoulder dislocation has not significantly decreased from 1990 to 2019. The incidence and YLD rates are associated with age, gender, and SDI. A thorough examination of the disease burden contributes to the efficient allocation and utilization of resources, as well as the development of targeted and effective intervention strategies.

A rare case of bilateral antero-internal shoulder dislocation: A case study and review of the literature

Introduction: Although anterior dislocations of the glenohumeral joint are the most frequent type of dislocation, bilateral forms are very rare [1] dominated by the posterior variant. We report a new case of bilateral anterior dislocation of the glenohumeral joints and discuss the mechanism and treatment. Case report: This concerns a 55-year-old patient, who presented to the emergency room with closed trauma to both shoulders in undetermined circumstances. The patient reported a disturbance of consciousness followed by a post-critical coma and generalized tonic-clonic seizures according to witnesses. Clinical examination revealed total functional impotence of the upper limbs, with the following findings: filling of the delto-pectoral groove, bilateral external axe strike, oedema of both shoulders. X-rays of both shoulders revealed bilateral anterior glenohumeral dislocation, with a nondisplaced fracture of the left great tuberosity. Discussion: Bilateral shoulder dislocation is a rare occurrence typically associated with specific etiologies such as epileptic seizures, electrical or neuromuscular disorders, or traumatic events. This report presents a case of bilateral shoulder dislocation in a patient with no history of ligament hyperlaxity, categorized under Brown's classification as traumatic origin. Despite the rarity of this presentation, similar unusual mechanisms of shoulder dislocation have been reported in the literature, including cases where each shoulder dislocated due to different mechanisms.

Magnetic Resonance Arthrogram Outperforms Standard Magnetic Resonance Imaging 2 Weeks After First Shoulder Dislocation for Labral Tear Diagnosis

PurposeThe aim of this study was to determine the comparative accuracy and precision of routine Magnetic Resonance Imaging (MRI) versus MR arthrogram in measuring labral tear size as a function of time from a shoulder dislocation. MethodsWe retrospectively evaluated consecutive patients who underwent primary arthroscopic stabilization between 2012 and 2021 in a single academic center. All patients completed a pre-operative MRI or MR arthrogram of the shoulder within 60 days of injury, and subsequently underwent arthroscopic repair within 6 months of imaging. Intraoperative labral tear size and location was used as standard for comparison. Three musculoskeletal radiologists independently interpreted tear extent using a clock-face convention. Accuracy and precision of MR labral tear measurements were defined based on location and size of the tear, respectively. Accuracy and precision were compared between MRI and MR arthrogram, as a function of time from dislocation. Results32 MRIs and 65 MR arthrograms (total n=97) were assessed. Multivariate analysis demonstrated that intraoperative tear size, early imaging, and arthrogram status were associated with increased MR accuracy and precision (p<0.05). Ordering surgeons preferred arthrogram for delayed imaging (p=0.018). For routine MRI, error in accuracy increased by 3.4° per day and error in precision increased by 2.3° per day (p<0.001) from time of injury. MR arthrogram, however, was not temporally influenced. Significant loss of accuracy and precision of MRI compared to MR arthrogram occurred at 2 weeks after an acute shoulder dislocation. ConclusionCompared to MR Arthrogram, conventional MRI demonstrates time-dependent loss of accuracy and precision in determining shoulder labral tear extent following dislocation, with statistical divergence occurring at 2 weeks.

Pediatric Emergency Medicine Didactics and Simulation (PEMDAS): Pediatric Sedation Complications.

Ketamine and propofol are commonly used agents for sedation in the pediatric emergency department (PED). While these medications routinely provide safe sedations, there are side effects providers should be able to recognize and manage. Currently, no pediatric sedation simulations exist in the literature. We created two sedation simulation cases for learners, including pediatric emergency medicine (PEM) fellows, working in the PED: case 1, a 12-year-old male with a shoulder dislocation requiring reduction under propofol sedation, and case 2, a forearm fracture requiring reduction under ketamine sedation. Learner actions included setting up equipment for sedations, dosing medications correctly, and managing complications. Additionally, in case 2, learners assigned an American Society of Anesthesiologists classification and selected the appropriate candidate for PED sedation from amongst three patients. A debrief followed the cases. Next, a didactic presentation reinforced concepts discussed in the debrief. Participants then completed an evaluation of the simulation. Fifty-eight emergency medicine residents and PEM fellows across four sites at three institutions participated. Participants scored the simulations and the debriefing session on a 5-point Likert scale. Learners rated the scenario as clinically relevant (M = 4.37) and effective at improving their comfort level in caring for critically ill patients (M = 4.36). Learners felt the debrief provided valuable learning (M = 4.40) and was a safe learning environment (M = 4.50). These cases can be utilized as resources for learners in any emergency department and can be tailored to any training background of learner providing sedation.

Capsule elongation occurs after first time shoulder dislocation A biomechanical in-vitro investigation on human cadaveric specimen

PurposeAs capsule elongation is assumed to weaken the static stability of the shoulder joint, the purpose of this biomechanical study was to demonstrate that capsule elongation occurs immediately after a first-time shoulder dislocation and not just after recurrent dislocation events. We hypothesize an increment in joint clearance due to joint capsule elongation after a first-time dislocation. MethodsAn experimental in-vitro study was conducted on 6 paired fresh frozen human shoulders (4 females; 2 males; 12 specimen) with a mean age of 80 (Range 67–89) years. The shoulder joint with the articular capsule was exposed and an inferior static tension force of 2.5 N was applied to the humerus prior to dislocation. Next, the humeral head was dislocated and was then immediately reduced back into the start position. The joint gap as well as joint capsule deformation was assessed using optical techniques. ResultsThe radiographic joint gap increased from 13.7 ± 6.9 mm (prior to dislocation) to 18.1 ± 6.5 mm (post dislocation) (p < .001). The increase in joint clearance was 4.4 mm. The joint capsule elongated from 5.9 ± 0.005 % (prior to dislocation) to 9.4 ± 0.007 % (post dislocation) (p < .001). The mean increase in joint capsule elongation was 3.5 %. ConclusionsCapsule elongation was observed immediately after a simulated first-time shoulder dislocation in an in-vitro model of elderly human cadavers. It might therefore not only be a phenomenon of recurrent dislocation events.

Open Bankart Repair with Subscapularis Split.

Anterior shoulder dislocations are a common injury, especially in the young, active, male population1. Soft-tissue treatment options for shoulder instability include arthroscopic or open Bankart repair, with open Bankart repair historically having lower rates of recurrence and reoperation, faster return to activity2-4, and a similar quality of life compared with arthroscopic repair5. More recent literature has suggested similar recurrence rates between arthroscopic and open procedures6. However, open Bankart repair may be indicated in cases of recurrent instability, especially if the patient participates in high-risk sports, because open repair can provide more capsular shift through the use of extra-capsular knots7. Performing a subscapularis split decreases the likelihood of subscapularis tendon avulsion following subscapularis tendon tenotomy and subsequent repair, as has been described in the literature8. Indications for open Bankart repair include failure of arthroscopic Bankart repair, multiple dislocations, with subcritical bone loss. This surgical technique is performed via the deltopectoral approach. The subscapularis tendon is exposed and "spared" by splitting the fibers with use of a longitudinal incision between the upper 2/3 and lower 1/3 of the subscapularis. We begin the split medially near the myotendinous junction. Because the subscapularis becomes increasingly difficult to separate from the capsule as it tracks laterally, a RAY-TEC sponge is utilized to bluntly dissect. A T-shaped laterally based capsulotomy is made to expose the glenohumeral joint. The vertical aspect is made first, followed by the horizontal aspect from lateral to medial, extending to the labrum. A Fukuda retractor is placed through the split to hold the humeral head laterally. The labrum is elevated, and the glenoid is prepared with rasp. Then labrum is repaired with knotted suture anchors until it is secure. One anchor is utilized for each "hour" of the clock face, with a minimum of 3 anchors. The anchors are placed on the articular margin of the glenoid. Sutures are passed from the anchor through the capsule and tied outside the capsule. The capsulotomy is then repaired with use of a suture. The suture is utilized to pull the inferior portion superiorly. The inferior portion is taken superiorly, and the superior leaflet is imbricated over the top. Finally, an examination is performed to ensure that the humeral head can be translated to but not over the anterior and posterior glenoid rims. No repair of the subscapularis tendon insertion is required. The incision is closed with deep dermal and subcuticular suture. Nonoperative treatment options include rotator cuff and periscapular strengthening or immobilization. Operative treatment options include open Bankart repair with subscapularis tenotomy and repair, arthroscopic Bankart repair, or bone block augmentation procedures. This procedure is different from the alternative treatments in that it is an open procedure, which allows for a more robust repair because the capsule can be shifted and doubled over, leading to the described decreased recurrence and reoperation rates. Open Bankart repair is better suited for large lesions that would be difficult to repair via arthroscopy. This procedure differs from other open Bankart techniques because the subscapularis is split rather than tenotomized, which removes the need to repair the tendon and decreases the rate of avulsion of the subscapularis tendon repair. Finally, this procedure is less invasive than the Latarjet procedure because it does not require osseous osteotomies and fixation. This procedure provides adequate capsular shift and visualization of the Bankart lesion without the increased risk of postoperative subscapularis tendon injury. If the subscapularis split alone does not provide adequate visualization, portions of the subscapularis tendon can be released from the lesser tuberosity.The location and origin of the upper and lower subscapular nerves can have variable courses, which could theoretically put them at risk for iatrogenic injury; however, studies have shown this subscapularis split technique to be safe from and prevent denervation of the muscle. GBL = glenoid bone lossEUA = examination under anesthesiaMRI = magnetic resonance imagingHSL = Hill-Sachs lesionAHCA = anterior humeral circumflex artery.

Shoulder &amp; Elbow

The February 2024 Shoulder &amp; Elbow Roundup360 looks at: Does indomethacin prevent heterotopic ossification following elbow fracture fixation?; Arthroscopic capsular shift in atraumatic shoulder joint instability; Ultrasound-guided lavage with corticosteroid injection versus sham; Combined surgical and exercise-based interventions following primary traumatic anterior shoulder dislocation: a systematic review and meta-analysis; Are vascularized fibula autografts a long-lasting reconstruction after intercalary resection of the humerus for primary bone tumours?; Anatomical versus reverse total shoulder arthroplasty with limited forward elevation; Tension band or plate fixation for simple displaced olecranon fractures?; Is long-term follow-up and monitoring in shoulder and elbow arthroplasty needed?

Turning the young and healthy patient into an elderly faster: A cascade of complications related to immobility

A 42-year-old individual presented with a ruptured left patellar ligament after playing basketball. After undergoing reconstructive orthopedic surgery, he sustained a posterior shoulder dislocation while using crutches, necessitating additional surgery. This combination of orthopedic injuries rendered the patient immobile and bedridden for several months, and immobility-related complications began to develop. Immobilism is a condition that physicians typically associate with elderly and neuropathic patients; however, little is said about this pathology when young and healthy patients who have experienced acute diseases are considered. With a review of the relevant literature, this article describes a peculiar succession of immobility-related complications.

Rate of Successful Shoulder Reduction on First Confirmatory Imaging in the Emergency Department

BackgroundManagement of acute shoulder dislocation in the emergency department (ED) is common. ObjectiveThis study describes the rate, risk factors, and length of stay (LOS) associated with shoulder dislocation reduction failure in the ED. MethodsThe study was a retrospective case–control study of patients 18 years and older presenting to the ED with acute shoulder dislocation who underwent attempted reduction. Patients with successful reduction on post-reduction first confirmatory imaging are compared with those requiring multiple attempts. ResultsOf 398 ED encounters when a shoulder reduction was attempted in the ED, 18.8% (75/398 [95% CI 15.2–22.9%]) required multiple reduction attempts. Patients with successful reduction on first confirmatory imaging were more commonly male (80.2% [95% CI 75.6–84.3%] vs. 68.0% [95% CI 56.8–77.8%]; p = 0.0220), discharged home from the ED (95.4% [95% CI 92.6–97.3%] vs. 84.0% [95% CI 74.4–91.0%]; p = 0.0004), reduced using a traction/countertraction technique (42.1% [95% CI 36.8–47.6%] vs. 29.3% [95% CI 19.9–40.4%]; p = 0.0415), and less likely to have a pre-reduction fracture (26.0% [95% CI 21.4–31.0%] vs. 45.3% [95% CI 34.4–56.7%]; p = 0.0010). Mean length of stay (LOS) for those with successful reduction on first confirmatory imaging was 2 hours and 8 minutes shorter than for those with more than one attempt (p < 0.001). ConclusionsThe rate of failed first-pass reduction is higher than previously reported. Furthermore, the ED LOS was significantly longer in patients requiring multiple attempts. Knowledge of the failure rate and risk factors may raise physician awareness and guide future studies evaluating approaches for verification of reduction success.

Anatomic total shoulder arthroplasty with stemless humeral component, nonspherical head, and inlay glenoid: clinical outcomes at mean 4.4-year follow-up

BackgroundLimitations of traditional stemmed anatomic total shoulder arthroplasty (aTSA) with a spherical head and onlay glenoid include 1) inaccurate replication of native nonspherical humeral head kinematics, 2) substantial bone resection, and 3) susceptibility to glenoid loosening. Our purpose was to examine the outcomes of stemless aTSA with a nonspherical head and inlay glenoid. MethodsSixty patients (63 shoulders) with end-stage glenohumeral osteoarthritis were treated by a single surgeon. The study population was limited to 22 patients/25 shoulders (13 male, 12 female; mean age 65.6 years) with 2-year minimum follow-up (mean 51.8 months) subdivided into 2 groups by age. The young group included 5 patients/5 shoulders (3 male, 2 female; mean age 52.2 years; mean follow-up 62.4 months), while the elderly group included 17 patients/20 shoulders (10 male, 10 female; mean age 68.9 years; mean follow-up 49.2 months). At the final follow-up, patient satisfaction and complications were evaluated and the Constant-Murley, American Shoulder and Elbow Surgeons, and SF-36 scores were compared to preoperative values. First postoperative radiographs were compared to the final follow-up for signs of gross loosening, implant tilt, subsidence, and periprosthetic radiolucency. ResultsNo humeral shaft fractures, infections, glenoid/humeral component loosening, radiolucencies, shoulder dislocations, or neurovascular complications were encountered. No reoperations or revisions were performed. The entire study population (25 shoulders) showed significant increases in the Constant score (47.4-82.8, P < .001), American Shoulder and Elbow Surgeons score (36.9-88.1, P < .001), and all components of the SF-36 score (P < .014) except general health perceptions (P = .490), role imitations (emotional) (P = .232), and mental health (P = .746), with a 95% patient satisfaction rate. There were no significant differences between the young and elderly groups in any outcomes (P > .107). ConclusionOur results suggest that stemless aTSA performed with a nonspherical humeral head and inlay glenoid is a safe and effective treatment for glenohumeral osteoarthritis in both young and elderly patients. However, longer term studies with larger patient populations will be required for corroboration.

Anterior shoulder dislocation with avulsion fracture of the greater tuberosity results in reliable good outcomes after closed reduction

BackgroundAvulsion of the greater tuberosity (GT) due to traumatic anterior shoulder dislocation (ASD) is a commonly observed fracture pattern. After closed reduction of the dislocated humerus, the greater tuberosity typically reduces itself into its anatomic position enabling the patient to undergo conservative treatment. The aim of this study was to retrospectively review a consecutive series of patients with conservatively treated GT avulsion fractures after closed reduction of an ASD and analyze radiographic outcome, shoulder function and glenohumeral stability and the conversion rate to surgical treatment. Material and methodsAll patients who underwent closed reduction of a GT avulsion fracture after ASD with the primary intention of conservative treatment between 2017 and 2022 were included. Complications (i.e. conversion to surgical treatment), shoulder function assessed with the American Shoulder and Elbow Surgeons (ASES) score and subjective shoulder value (SSV), instability assessed with the Western Ontario Shoulder Instability (WOSI) score, radiological impingement (greater tuberosity index = GTI and impingement index = II) and GT fracture pattern were assessed as outcome measurements. ResultsA total of 29 patients (mean age 44 years, 27% female) with a mean follow-up of 32.6 (range, 8-96) months were enrolled. Seven patients (24%) underwent surgery due to secondary displacement (n=4, 14%) or impingement symptoms (n=3, 10%). All patients who underwent secondary surgery showed a multifragmentary fracture pattern of the GT. Shoulder stiffness (n=7) and neuropraxia of the axillary nerve (n=3) were observed temporarily and resolved during the follow-up period. The ASES and SSV of the conservatively treated patients at the last follow-up was 89.2±19.1 respectively 86±18.2%. No recurrent glenohumeral dislocation was documented. The mean WOSI score at last follow-up was 8(0-71). The mean GTI decreased from 1.2±0.1 after ASD to 1.1±0.1 at the last follow-up (p=0.002). The mean II decreased from 0.6±0.5 after ASD to 0.4±0.3 at the last follow-up (p=0.110). ConclusionThe greater tuberosity avulsion fragment reduces typically into a close to anatomic position after closed reduction and the greater tuberosity index even improves with further conservative treatment over time. Close radiological follow-up is necessary to rule out secondary displacement which occurs typically in a multifragmentary fracture pattern. Patients without the need for surgery showed good clinical outcomes without recurrence of glenohumeral instability.

Acute rehabilitation following traumatic anterior shoulder dislocation (ARTISAN): pragmatic, multicentre, randomised controlled trial

ObjectiveTo assess the effects of an additional programme of physiotherapy in adults with a first-time traumatic shoulder dislocation compared with single session of advice, supporting materials, and option to self-refer...

USING 3D PRINTING FOR OPEN REDUCTION OF CHRONIC POSTERIOR SHOULDER DISLOCATION (CASE FROM PRACTICE)

Objective. An example of the treatment of a patient with chronic posterior dislocation of the shoulder, previously operated on by the Latarge technique due to recurrence of anterior instability, is given. Methods. The patient presented with an old fixed posterior dislocation of the left shoulder joint, large bone defect of the front part of the head (reverse Hill-Sachs). The patient has already undergone 2 operations on the left shoulder due to chronic anterior dislocation of the humeral head: 2018 — arthroscopy and capsuloplasty according to Bankart; 2020 — arthrotomy with Latarje transposition (due to recurrence of anterior instability). The peculiarity of this case is a bone block with screws located on the front surface of the glenoid made a massive defect front part of the humeral head. Planning performed on the basis of a CT scan of the shoulder joint in the FreeformPlus program. Assessment of functioning performed on the QuickDASH and Constant scales. The results. To improve the performance of intraoperative osteoplasty of the defect, a plastic model of the humeral head was printed for simulating bone graft and osteosynthesis. According to the QuickDASH scale before the operation, the patient had 45 points, that is, a significant decrease in the function of the upper limb — constant discomfort, pain. After surgery for 2 days — 35 points, 6 weeks — 12, and 3 months. — 12 points, that is, the patientʼs quality of life has improved significantly. According to the Constant scale before the operation, there were 16 points, of which: pain — 6, household activity — 2, range of motion — 8. After surgery on the 2nd day, a total of 33 points: pain — 10, household activity — 7, range of motion (passive) — 16, after 6 weeks — 80 points, this result remained after 3 months. Conclusion. The use of three-dimensional planning and an individual tool greatly facilitated the main stages ofsurgical intervention in the case of chronic posterior dislocation of the humeral head and made it possible to quickly and conveniently prepare a bone graft and install it in the defect. The printed navigation made it possible to perform a stabilizing osteosynthesis, ensure high patient satisfaction and a good functional result.