Diagnostic accuracy of non-contrast MRI in frozen shoulder.

Introduction: Despite being the most used exam today, few studies have evaluated the accuracy of findings on non-contrast magnetic resonance imaging (MRI). The primary objective of the study was to evaluate the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of non-contrast MRI findings in frozen shoulder, isolated and in combination. The secondary objectives were to define the interobserver and intraobserver agreement of the assessments and the odds ratio for frozen shoulder because of the various findings of MRI.

Using Machine Learning to Predict Nonachievement of Clinically Significant Outcomes After Rotator Cuff Repair.

Background: Although some evidence suggests that machine learning algorithms may outperform classical statistical methods in prognosis prediction for several orthopaedic surgeries, to our knowledge, no study has yet used machine learning to predict patient-reported outcome measures after rotator cuff repair.

Purpose: To determine whether machine learning algorithms using preoperative data can predict the nonachievement of the minimal clinically important difference (MCID) of disability at 2 years after rotator cuff surgical repair with a similar performance to that of other machine learning studies in the orthopaedic surgery literature.

Study Design: Case-control study; Level of evidence, 3.

Rotator cuff repair in patients 50 years of age or younger: A comparative study of functional outcomes in relation to older patients.

Background: Few studies have evaluated the clinical results of surgical treatment of rotator cuff tears in young patients and most of the publications are only case series and with a small number of evaluated individuals. The aim of this study is to compare the clinical outcomes of patients undergoing arthroscopic rotator cuff repair according to age at the time of the procedure.

Hypothesis: Patients with 50 years of age or younger undergoing surgical treatment of rotator cuff tear have similar clinical outcomes to older patients.

Prognostic Factors for Clinical Outcomes After Arthroscopic Rotator Cuff Repair.

Background: Limited knowledge exists regarding prognostic factors after rotator cuff repair.

Purpose: To identify pre- and perioperative predictors for functional outcomes after arthroscopic rotator cuff repair.

Study Design: Case-control study; Level of evidence, 3.

A numerical study of the contact geometry and pressure distribution along the glenoid track.

The glenoid track geometry and the contact forces acting on the glenohumeral joint at static positions of 30°, 60°, 90° and 120° of abduction with 90° of external rotation were evaluated using a finite element model of the shoulder that, differently from most usual approximations, accounts the humeral head translations and the deformable-to-deformable non-spherical joint contact. The model was based on data acquired from clinical exams of a single subject, including the proximal humerus, scapula, their respective cartilages concerning the glenohumeral joint, and the rotator cuff and deltoid muscles. The forces acting on the glenohumeral joint were estimated using a simulation framework consisting of an optimization procedure allied with finite element analysis that seeks the minimum muscle forces that stabilize the joint.

Treatment of Irreparable Rotator Cuff Tears: Superior Capsular Reconstruction with Fascia Lata Allograft.

 The objective of the present study was to evaluate the efficacy and safety of superior capsular reconstruction (SCR) using fascia lata allograft.  A prospective case series of 15 patients with irreparable supraspinatus tear who underwent SCR using fascia lata allograft. The American Shoulder and Elbow Surgeons (ASES) scale at 12 months after surgery was the primary outcome.

Clinical Validation of the Glenoid Track Concept in Anterior Glenohumeral Instability.

 To evaluate the correlation of the glenoid track and glenoidal bone loss with the recurrence dislocation rate and the Rowe score.  Retrospective study that assessed the glenoid track and glenoidal bone loss through preoperative magnetic resonance imaging. Patients undergoing primary arthroscopic repair of anterior Bankart were included.

THE POLYMORPHISM OF METALLOPROTEINASES 1 AND 13 AND POSTTRAUMATIC ELBOW STIFFNESS.

Introduction: To evaluate the relationship between the genetic polymorphism of matrix metalloproteinases 1 and 13 and posttraumatic elbow stiffness, as well as the association of other risk factors with this condition.

Materials And Methods: We evaluated 20 patients with posttraumatic elbow stiffness and 12 controls with traumatic elbow disorders without contracture. Deoxyribonucleic acid (DNA) was obtained from buccal mucosa epithelial cells of the volunteers.

Biceps tenotomy or tenodesis in association with rotator cuff repair: is there an influence on functional results? A retrospective cohort study.

Background: Instability or tears of the long head of the biceps tendon (LHBT) may be present in more than 35% of rotator cuff repairs (RCR).

Objective: To compare clinical results from patients undergoing arthroscopic RCR, according to the procedure performed at the LHBT.

Design And Setting: Retrospective cohort study designed at the shoulder and elbow clinic of Instituto de Ortopedia e Traumatologia, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo, Brazil.

No Clinical or Radiographic Difference Seen in Arthroscopic Bankart Repair With Knotted Versus Knotless Suture Anchors: A Randomized Controlled Trial at Short-Term Follow-Up.

Purpose: The objective of this study was to compare the clinical and radiographic results of patients undergoing arthroscopic repair of labral lesions using knotted and knotless anchors.

Methods: Sixty-four patients with anterior labral lesions (bone defects of the glenoid up to 13.5% or up to 20% if the instability severity index score was less than 4) and without other shoulder pathologies were randomly assigned to 2 groups, with 32 patients in each group.

Does the supraspinatus tear pattern affect the results of the arthroscopic repair?

 To evaluate the influence of the supraspinal tear pattern on the pre- and postoperative functional evaluations.  A retrospective cohort study comparing patients with supraspinatus crescent-shaped tears versus L- or U-shaped tears. We included patients undergoing complete supraspinatus arthroscopic repair.

Does a subscapularis tear combined with a posterosuperior rotator cuff tear affect postoperative functional outcomes?

Background: The subscapularis is biomechanically important for the shoulder. However, few studies have clinically assessed its importance using a comparative design. Our objective was to compare the functional outcomes in patients who underwent isolated repair of posterosuperior rotator cuff tears and those with repair of combined tears involving the subscapularis.

Nonoperative Treatment for Displaced Proximal Humeral Fractures in Elderly Patients: Correlation Between Deviations and Clinical Outcomes.

 To describe the functional result of the conservative treatment of displaced proximal humerus fractures (PHF) using the American Shoulder and Elbow Surgeons (ASES) score after 12 months and assess whether the different initial classifications and radiographic measurements are related to clinical results.  Forty patients > 60 years old, with displaced PHUs submitted to conservative treatment were evaluated at standardized times (3, 6, and 12 months). The American Society of Shoulder and Elbow Surgeons (ASES), Constant-Murley and Single Assessment Numeric Evaluation (SANE) scales were used as clinical outcomes.

Clinical Outcome of Partial Repair of Irreparable Rotator Cuff Tears.

 To evaluate the functional outcome of patients who underwent partial arthroscopic repair of massive rotator cuff tears.  Retrospective case series evaluating patients with massive rotator cuff tears who underwent partial arthroscopic repair. The primary outcome was the American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form (ASES) at 24 months.

Family Predisposition for Rotator Cuff Tear and Other Tendinopathies - A Case-Control Study.

 To evaluate the prevalence of family history of rotator cuff tear and the presence of tendinopathy in other joints in patients with rotator cuff tears and to compare them with paired controls. To estimate the odds ratio for rotator cuff tear for these two risk factors.  We performed a case-control study comparing patients submitted to treatment for rotator cuff tear with asymptomatic controls.

Diagnostic accuracy of preoperative magnetic resonance imaging for detecting subscapularis tendon tears: a diagnostic test study.

Background: The accuracy of magnetic resonance imaging (MRI) for making the diagnosis of subscapularis tears presents wide variation in the literature and there are few prospective studies.

Objective: To compare the findings from MRI and arthroscopy for diagnosing subscapularis tears.

Design And Setting: Diagnostic test study performed in a tertiary care hospital.

Superior Capsular Reconstruction with Fascia Lata Allograft for Irreparable Supraspinatus Tendon Tears.

Superior capsular reconstruction is a recently described procedure for the treatment of irreparable supraspinatus tendon tears. Graft options that have been previously described include autogenous fascia lata and decellularized dermal graft. No studies were published with the use of fascia lata allograft.

Anterior Glenohumeral Instability: Systematic Review of Outcomes Assessment Used in Brazil.

A review involving the six major international orthopedic journals has been published recently. It described the tools used for the evaluation of outcomes in the surgical treatment of recurrent anterior dislocation of the shoulder. There are no studies that exhibit the main outcome tools for this disease in Brazil.

Accuracy of magnetic resonance imaging (MRI) for subscapularis tear: a systematic review and meta-analysis of diagnostic studies.

Introduction: The accuracy of MRI for subscapularis tear is lower than that of overall rotator cuff tears. Until now, no systematic reviews and meta-analysis have been conducted to compile these data. The purpose of this study was to determine, through a systematic review and meta-analysis, the diagnostic accuracy of MRI in the detection of subscapularis tendon tears.

Septic arthritis of the shoulder and elbow: one decade of epidemiological analysis at a tertiary referral hospital.

Objective: To describe the clinical and epidemiological characteristics of patients with septic arthritis of the shoulder or elbow and to evaluate prognostic factors for complications during treatment.

Methods: A retrospective case series was studied with patients treated between 2004 and 2014. The patients' clinical and epidemiological characteristics were collected.

Asian ethnicity: a risk factor for adhesive capsulitis?

Objective: The aim of this study was to evaluate whether Asian ethnicity is a risk factor for the development of adhesive capsulitis. The secondary aim was to describe the distribution of cases of capsulitis by age group.

Methods: A cross-sectional study comparing the rate of adhesive capsulitis in individuals of Asian ethnicity with that of other ethnicities.

Clinical and Structural Evaluations of Rotator Cuff Repair With and Without Added Platelet-Rich Plasma at 5-Year Follow-up: A Prospective Randomized Study.

Background: Platelet-rich plasma (PRP) has been studied with the objective of reducing the retear rate and improving functional outcomes after rotator cuff repair. Only one study to date has reported its midterm effect.

Hypothesis: PRP promotes better functional and structural results in arthroscopic rotator cuff repair.

Correlation between the UCLA and Constant-Murley scores in rotator cuff repairs and proximal humeral fractures osteosynthesis.

Objective: To evaluate the correlation between the UCLA and Constant-Murley scores in the surgical treatment of rotator cuff tears and proximal humeral fractures (PHF).

Methods: Retrospective study evaluating patients submitted to arthroscopic rotator cuff repair and surgical treatment of PHF with 2-year follow-up. Patients were evaluated by the UCLA and Constant-Murley scores in the preoperative period for the rotator cuff repairs, and 3, 6, 12 and 24 months after surgery for both diagnoses.