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Cureus Feb 2024Pediatric avulsion fractures most commonly occur at sites of secondary ossification and are often associated with chronic stress from repetitive movements. Because of a...
Pediatric avulsion fractures most commonly occur at sites of secondary ossification and are often associated with chronic stress from repetitive movements. Because of a variety of risk factors, youth athletes place higher stress on ossification centers, and their activities may predispose them to injury. This case report describes a 12-year-old female softball player who presented with pain at the distal acromion, worsened by her overhead throwing motion. Further questioning revealed improper throwing mechanics placing extenuated stress on the shoulder. Plain radiograph imaging showed an avulsion fracture of the distal acromion; conservative management with decreased mobilization and cessation of activity was recommended. Reimaging four weeks later revealed a bone-on-bone healing, and the patient was gradually allowed to return to function. This report's discussion details the unusual location for a common injury, the mechanism of injury, an association of throwing mechanics with a shoulder injury, and recommended treatment strategies for pediatric avulsion fractures.
PubMed: 38550427
DOI: 10.7759/cureus.55002 -
Scientific Reports Mar 2024Chronic rotator cuff injuries (CRCIs) still present a great challenge for orthopaedics surgeons. Many new therapeutic strategies are developed to facilitate repair and...
Chronic rotator cuff injuries (CRCIs) still present a great challenge for orthopaedics surgeons. Many new therapeutic strategies are developed to facilitate repair and improve the healing process. However, there is no reliable animal model for chronic rotator cuff injury research. To present a new valuable rat model for future chronic rotator cuff injuries (CRCIs) repair studies, and describe the changes of CRCIs on the perspectives of histology, behavior and MRI. Sixty male Wistar rats were enrolled and underwent surgery of the left shoulder joint for persistent subacromial impingement. They were randomly divided into experimental group (n = 30, a 3D printed PEEK implant shuttled into the lower surface of the acromion) and sham operation group (n = 30, insert the same implant, but remove it immediately). Analyses of histology, behavior, MRI and inflammatory pain-related genes expression profiles were performed to evaluate the changes of CRCIs. After 2-weeks running, the rats in the experimental group exhibited compensatory gait patterns to protect the injured forelimb from loading after 2-weeks running. After 8-weeks running, the rats in the experimental group showed obvious CRCIs pathological changes: (1) acromion bone hyperplasia and thickening of the cortical bone; (2) supraspinatus muscle tendon of the humeral head: the bursal-side tendon was torn and layered with disordered structure, forming obvious gaps; the humeral-side tendon is partially broken, and has a neatly arranged collagen. Partial fat infiltration is found. The coronal T2-weighted images showed that abnormal tendon-to-bone junctions of the supraspinatus tendon. The signal intensity and continuity were destroyed with contracted tendon. At the nighttime, compared with the sham operation group, the expression level of IL-1β and COX-2 increased significantly (P = 0063, 0.0005) in the experimental group. The expression of COX-2 in experimental group is up-regulated about 1.5 times than that of daytime (P = 0.0011), but the expression of IL-1β, TNF-a, and NGF are all down-regulated (P = 0.0146, 0.0232, 0.0161). This novel rat model of chronic rotator cuff injuries has the similar characteristics with that of human shoulders. And it supplies a cost-effective, reliable animal model for advanced tissue engineered strategies and future therapeutic strategies.
Topics: Humans; Rats; Animals; Male; Rotator Cuff Injuries; Rats, Wistar; Cyclooxygenase 2; Rotator Cuff; Tendons; Interleukin-1beta
PubMed: 38438458
DOI: 10.1038/s41598-024-55281-5 -
Sensors (Basel, Switzerland) Aug 2023Monitoring shoulder kinematics, including the scapular segment, is of great relevance in the orthopaedic field. Among wearable systems, magneto-inertial measurement... (Review)
Review
Monitoring shoulder kinematics, including the scapular segment, is of great relevance in the orthopaedic field. Among wearable systems, magneto-inertial measurement units (M-IMUs) represent a valid alternative for applications in unstructured environments. The aim of this systematic literature review is to report and describe the existing methods to estimate 3D scapular movements through wearable systems integrating M-IMUs. A comprehensive search of PubMed, IEEE Xplore, and Web of Science was performed, and results were included up to May 2023. A total of 14 articles was included. The results showed high heterogeneity among studies regarding calibration procedures, tasks executed, and the population. Two different techniques were described, i.e., with the x-axis aligned with the cranial edge of the scapular spine or positioned on the flat surface of the acromion with the x-axis perpendicular to the scapular spine. Sensor placement affected the scapular motion and, also, the kinematic output. Further studies should be conducted to establish a universal protocol that reduces the variability among studies. Establishing a protocol that can be carried out without difficulty or pain by patients with shoulder musculoskeletal disorders could be of great clinical relevance for patients and clinicians to monitor 3D scapular kinematics in unstructured settings or during common clinical practice.
Topics: Humans; Biomechanical Phenomena; Scapula; Shoulder; Shoulder Joint; Range of Motion, Articular; Wearable Electronic Devices
PubMed: 37571723
DOI: 10.3390/s23156940 -
Revista Brasileira de Ortopedia Oct 2023The objectives of this study are to compare absolute values of acromial index (AI) and critical shoulder angle (CSA) obtained in both radiographs and magnetic...
The objectives of this study are to compare absolute values of acromial index (AI) and critical shoulder angle (CSA) obtained in both radiographs and magnetic resonance image (MRI) of the shoulder; and to compare the interobserver and intra-observer agreement for AI and CSA values measured in these image modalities. Patients who had medical indication of investigating shoulders conditions through radiographs and MRI were included. Images were taken to two fellowship-trained shoulder surgeons, which conducted measurements of AI and CSA in radiographs and in MRI. Twelve weeks after the first evaluation, a second evaluation was conducted. Inter- and intra-observer reliability was presented as an Intraclass Correlation Coefficient (ICC) and agreement was classified according to Landis & Koch criteria. The differences between two measurements were evaluated using Bland-Altman plots. 134 shoulders in 124 subjects were included. Mean intra-observer ICC for CSA in X-rays and in MRI were 0.936 and 0.940, respectively; for AI, 0.908 and 0.022. Mean inter-observer ICC for CSA were 0.892 and 0.752 in X-rays and MRI respectively; for AI, ICC values were 0.849 and 0.685. All individual analysis reached statistical power ( < 0.001). Mean difference for AI values measured in X-rays and in MRI was 0.01 and 0.03 for observers 1 and 2, respectively. Mean difference for CSA values obtained in X-rays and MRI was 0.16 and 0.58 for observers 1 and 2, respectively. Both MRI and X-rays provided high intra- and interobserver agreement for measurement of AI and CSA. Absolute values found for AI and CSA were highly correlated in both image modalities. These findings suggest that MRI is a suitable method to measure AI and CSA. , Diagnostic Study.
PubMed: 37908539
DOI: 10.1055/s-0043-1776136 -
Clinical Anatomy (New York, N.Y.) Jan 2024This study aimed to investigate the anatomy of the spinal accessory nerve (SAN) in the posterior cervical triangle, especially in relation to adjacent anatomical... (Meta-Analysis)
Meta-Analysis Review
This study aimed to investigate the anatomy of the spinal accessory nerve (SAN) in the posterior cervical triangle, especially in relation to adjacent anatomical landmarks, along with a systematic review of the current literature with a meta-analysis of the data. Overall, 22 cadaveric and three prospective intraoperative studies, with a total of 1346 heminecks, were included in the analysis. The major landmarks relevant to the entry of the SAN at the posterior border of the SCM muscle (PBSCM) were found to be the mastoid apex, the great auricular point (GAP), the nerve point (NP), and the point where the PBSCM meets the upper border of the clavicle. The SAN was reported to enter the posterior cervical triangle above GAP in 100% of cases and above NP in most cases (97.5%). The mean length of the SAN along its course from the entry point to its exit point from the posterior triangle of the neck was 4.07 ± 1.13 cm. The SAN mainly gave off 1 or 2 branches (32.5% and 31%, respectively) and received either no branches or one branch in most cases (58% and 23%, respectively) from the cervical plexus during its course in the posterior cervical triangle. The major landmarks relevant to the entry of the SAN at the anterior border of the TPZ muscle (ABTPZ) were found to be the point where the ABTPZ meets the upper border of the clavicle and the midpoint of the clavicle, along with the mastoid apex, the acromion, and the transverse distance of the SAN exit point to the PBSCM. The results of the present meta-analysis will be helpful to surgeons operating in the posterior cervical triangle, aiding the avoidance of the iatrogenic injury of the SAN.
Topics: Humans; Accessory Nerve; Prospective Studies; Cadaver; Neck; Neck Muscles
PubMed: 37767816
DOI: 10.1002/ca.24119 -
Journal of Shoulder and Elbow Surgery Nov 2023The injury mechanism of acromioclavicular (AC) dislocation combined with coracoid process (CP) fracture is not clear, and there is no consensus on its treatment. This...
BACKGROUND
The injury mechanism of acromioclavicular (AC) dislocation combined with coracoid process (CP) fracture is not clear, and there is no consensus on its treatment. This study was performed to evaluate the diagnosis of CP fractures combined with AC dislocation and the effectiveness of operative treatment using a clavicular hook plate.
METHODS
Eighteen patients with CP fractures combined with AC dislocation were treated with a clavicular hook plate from May 2012 to June 2021. The patients comprised 10 male and 8 female patients with an average age of 38 years (range, 16-54 years). The injury was caused by falling in 15 patients, traffic accidents in 2 patients, and falling from a height in 1 patient. The Eyres type of CP fracture was type II in 1 patient, type III in 11 patients, type IV in 3 patients, and type V in 3 patients. The Ogawa type of CP fracture was type I in 17 patients and type II in 1 patient. The Rockwood type of AC dislocation was type V in 1 patient, variation type III in 15 patients, and variation type V in 2 patients. The interval from injury to the operation was 3 days (range, 1-7 days). Postoperative complications and CP fracture healing were recorded. Functional assessment at the last follow-up was performed by an independent reviewer using the Constant score and visual analog scale score.
RESULTS
All 18 patients were followed up for a mean period of 49 months (range, 12-123 months). Nine patients had acromion osteolysis and 3 patients had CP fracture nonunion (Eyres type II, III, and V in 1 patient each); however, no patients developed shoulder pain, incision infection, limitation of shoulder movement, clinical symptoms of subcoracoid impingement, or AC dislocation relapse. At the last follow-up, the mean Constant score was 99 (range, 94-100).
CONCLUSIONS
The possibility of CP fracture should be considered in patients with AC dislocation to avoid a missed diagnosis. Fixation with a clavicular hook plate is a feasible treatment for CP fracture combined with AC dislocation and provides a satisfactory outcome. CP fracture healing may be related to the fracture morphology.
Topics: Humans; Male; Female; Adult; Acromioclavicular Joint; Coracoid Process; Fracture Fixation, Internal; Shoulder Dislocation; Fractures, Bone; Joint Dislocations; Bone Plates; Treatment Outcome
PubMed: 37263479
DOI: 10.1016/j.jse.2023.04.025 -
The American Journal of Sports Medicine Oct 2023The influence of bony morphology on the development of posterior shoulder instability is not well known.
BACKGROUND
The influence of bony morphology on the development of posterior shoulder instability is not well known.
PURPOSE
To determine if acromial morphology, as measured on magnetic resonance imaging (MRI), is associated with posterior or anterior shoulder instability.
DESIGN
Cross-sectional study; Level of evidence, 3.
METHODS
MRI measurements of posterior acromial coverage (PAC), posterior acromial height (PAH), posterior acromial tilt (PAT), and anterior acromial coverage (AAC) were completed for 3 separate matched groups who underwent surgical intervention: posterior instability, anterior instability, and a comparison group of patients who underwent arthroscopic surgery for snapping scapula. Inclusion criteria were patients with recurrent instability <40 years of age without multidirectional instability, glenoid bone loss >13.5%, or glenoid retroversion >10%.
RESULTS
Overall, 37 patients were included in each group. PAC was significantly less in the posterior instability group than in the anterior instability and comparison groups (68.3° vs 88.7° vs 81.7°; < .001). PAH was significantly greater in the posterior group than in the anterior instability group (11.0 mm vs -0.1 mm; < .001) and comparison group (0.7 mm; < .001). There was no difference between the posterior and anterior groups in terms of PAT or AAC ( = .45 and = .05, respectively). PAT was significantly smaller in the posterior instability group than the comparison group (55.2° vs 62.2°; = .026). The anterior and comparison groups were not significantly different in PAH or PAT ( = .874 and = .067, respectively) but were significantly different in AAC ( = .026).
CONCLUSION
A higher and flatter posterior acromion, as measured on preoperative MRI, appears to be associated with patients who require arthroscopic capsulolabral repair due to posterior shoulder instability. This information may help clinicians to both diagnose and predict the need for operative intervention for patients with posterior labral tears.
Topics: Humans; Acromion; Joint Instability; Shoulder Joint; Shoulder; Cross-Sectional Studies; Magnetic Resonance Imaging; Arthroscopy
PubMed: 37732534
DOI: 10.1177/03635465231197661 -
Acta Chirurgiae Orthopaedicae Et... 2024The critical shoulder angle (CSA) is formed by the combination of glenoid inclination and acromial index and has been shown related to rotator cuff tears and...
PURPOSE OF THE STUDY
The critical shoulder angle (CSA) is formed by the combination of glenoid inclination and acromial index and has been shown related to rotator cuff tears and glenohumeral osteoarthritis. SLAP lesions today have an important place among bicipitolabral pathologies that cause intensive shoulder pain. We aimed to investigate the relationship between CSA and glenoid depth and SLAP lesions.
MATERIAL AND METHODS
Between March 2017 and January 2022, 279 consecutive shoulder arthroscopy patients' MRI images were retrospectively examined. After the exclusion criteria, 191 patients were eligible. Patients with SLAP lesions (n=37) were assembled as the study group (Group 1), and patients with intact superior labrum (n=154) were named as the control group (Group 2). Critical shoulder angle (CSA) and glenoid depth measurements were performed using the preoperative MRI images.
RESULTS
A total of 191 patients, of whom 84 were male (44%) were included. The mean age was 49.9±14.96 (range 18-79). There was a statistically signifi cant difference between the SLAP group (Group 1) and the control group (Group 2) in terms of CSA (p=0.032). The mean CSA was 31.66°±3.51° in Group 1 and 33.57° ±5.01° in Group 2. The cut-off value for CSA in patients with SLAP lesions was calculated as 32.85° and the area under the curve was 0.61, therefore a satisfactory association was observed between the groups. The mean glenoid depth was 4.32 ±1.25 mm in Group 1, and 4.39 ±0.32 mm in Group 2. There was no statistically signifi cant difference between the groups in terms of glenoid depth (p=0.136) and also no association between the glenoid depth and SLAP lesions was observed (cut-off=4.45 mm, AUC=0.32).
CONCLUSIONS
Low CSA is associated with SLAP lesions, just as in glenohumeral osteoarthritis. Further prospective clinical studies are needed to enlighten the predisposing effect of CSA to SLAP lesions and the success of superior labral repairs.
LEVEL OF EVIDENCE
Retrospective comparative study, Level III.
Topics: Humans; Male; Adult; Middle Aged; Female; Shoulder; Retrospective Studies; Scapula; Acromion; Osteoarthritis
PubMed: 38447566
DOI: 10.55095/achot2024/007 -
Open Displaced Fracture of Acromion with Associated Complete Supraspinatus Tear: A Rare Case Report.Journal of Orthopaedic Case Reports Aug 2023Isolated acromion fractures are rare and in that too, orthopaedicians rarely come across open acromial fractures. Hence literature regarding their management, outcome...
INTRODUCTION
Isolated acromion fractures are rare and in that too, orthopaedicians rarely come across open acromial fractures. Hence literature regarding their management, outcome and any associated complications is obscure. In an extensive search for literature related to our case we found very few articles. We hereby report a case of Gustilo IIIA open acromial fracture with associated supraspinatus, deltoid and capsular injury managed with tension band wiring (TBW) and soft tissue repair with 6 month follow up.
CASE REPORT
A 21-year-old male was admitted in our hospital for wound of right shoulder with pain and inability to move this arm with a history of direct trauma with sharp object 3 days back. On examination, a wound 15 cm in length on the superior aspect of the right shoulder with its depth extending up to the glenohumeral joint was noted. The glenohumeral joint was exposed with a Gustilo Anderson type IIIA acromion fracture and injury of supraspinatus and capsule with no associated vascular or neurological injury. Wound was thoroughly irrigated and was used to approach the fracture site for repair. Capsule of shoulder was carefully closed with absorbable suture followed by suturing of supraspinatus with non-absorbable suture. Our initial plan to fix the acromial fracture to spinous process of scapula with 2 4 mm cannulated cancellous screw placed orthogonal to fracture site was modified intraoperative due to screw cut out and we went ahead with TBW with 1 screw and 1 Kirschner wire to prevent further fragmentation of the fragment. Wound was healing and healthy. Patient was started on a passive pendular exercises after 4 weeks and active exercises at 6 weeks. Six months postoperatively patient had complete range of shoulder rotation with forward flexion of 80° and abduction possible till 45°. Patient was able to do most of his activities of daily living barring overhead activities.
CONCLUSION
As there are very limited cases of this sort of injury, this case report will cast a light on management options and outcomes of such injuries. We received fair results in our study with good healing and painless functional shoulder joint. However, long term and multi centric studies are required for further information pertaining to such scenarios.
PubMed: 37654753
DOI: 10.13107/jocr.2023.v13.i08.3810 -
European Journal of Radiology Nov 2023The Critical Shoulder Angle Related Acromion Morphological Parameter (CSA- RAMP) is a valuable tool in the analyzing the etiology of the rotator cuff tears (RCTs)....
BACKGROUND
The Critical Shoulder Angle Related Acromion Morphological Parameter (CSA- RAMP) is a valuable tool in the analyzing the etiology of the rotator cuff tears (RCTs). However, its clinical application has been limited by the time-consuming and prone to inter- and intra-user variability of the measurement process.
OBJECTIVES
To develop and validate a deep learning algorithm for fully automated assessment of shoulder anteroposterior radiographs associated with RCTs and calculation of CSA-RAMP.
METHODS
Retrospective analysis was conducted on radiographs obtained from computed tomography (CT) scans and X-rays performed between 2018 and 2020 at our institution. The development of the system involved the utilization of digitally reconstructed radiographs (DRRs) generated from each CT scan. The system's performance was evaluated by comparing it with manual and semiautomated measurements on two separate test datasets: dataset I (DRRs) and dataset II (X-rays). Standard metrics, including mean average precision (AP), were utilized to assess the segmentation performance. Additionally, the consistency among fully automated, semiautomated, and manual measurements was comprehensively evaluated using the Pearson correlation coefficient and Bland-Altman analysis.
RESULTS
A total of 1080 DRRs generated from 120 consecutive CT scans and 159 X-ray films were included in the study. The algorithm demonstrated excellent segmentation performance, with a mean AP of 57.67 and an AP of 94.31. Strong inter-group correlations were observed for all CSA-RAMP measurements in both test datasets I (automated versus manual, automated versus semiautomated, and semiautomated versus manual; r = [0.990---0.997], P < 0.001) and dataset II (r = [0.984---0.995], P < 0.001). Bland-Altman analysis revealed low bias for all CSA-RAMP measurements in both test datasets I and II, except for CD (with a maximum bias of 2.49%).
CONCLUSIONS
We have successfully developed a fully automated algorithm capable of rapidly and accurately measuring CSA-RAMP on shoulder anteroposterior radiographs. A consistent automated CSA- RAMP measurement system may accelerate powerful and precise studies of disease biology in future large cohorts of RCTs patients.
Topics: Humans; Acromion; Shoulder Joint; Deep Learning; Shoulder; Radiography; Rotator Cuff Injuries
PubMed: 37714046
DOI: 10.1016/j.ejrad.2023.111083