Wide Resection Preserving Conjoined Tendons of the Rotator Cuff Muscles for Undifferentiated Pleomorphic Sarcoma at the Suprascapular Fossa - A Case Report.

Surgical principles in sarcoma are a wide resection, including surrounding tissues and maximisation of the function of the affected limb. Rotator cuff muscles are biomechanically important structures acting as a force couple in movement of the shoulder joint. Thus, conjoined tendons are essential for motion capability in absence of the supraspinatus muscle.

Humeral head coverage in arthroscopic partial repair of massive rotator cuff tears improves functional outcomes: an analysis of influential factors.

Background: Although partial rotator cuff repair has shown good outcomes, differences in clinical outcomes remain concerns. This study was performed to determine whether patients with humeral head coverage would show better functional outcomes than patients without humeral head coverage and to identify the factors for humeral head coverage after arthroscopic partial repair of massive tears.

Methods: We performed a retrospective study of 63 patients with massive rotator cuff tears who underwent arthroscopic partial repair between 2012 and 2018.

Diagnostic value of the axial view of magnetic resonance imaging to identify two-dimensional shapes of full-thickness rotator cuff tears.

Background: Coronal and sagittal views of magnetic resonance imaging (MRI) were used to determine rotator cuff tear size and fatty infiltration, but these images were not enough to identify the tear shape.

Purpose: To correlate the preoperative axial MRI views and arthroscopic surgical findings to identify the two-dimensional shapes in rotator cuff tears.

Material And Methods: This study included 166 patients who underwent arthroscopic repair between 2015 and 2018.

Risk Factors That Influence Subsequent Recurrent Instability in Terrible Triad Injury of the Elbow.

Objective: To identify risk factors associated with subsequent recurrent instability and to identify predictors of poor outcomes in terrible triad injury of the elbow.

Design: Retrospective cohort study.

Setting: University trauma center.

In vivo biomechanical measurement and haptic simulation of portal placement procedure in shoulder arthroscopic surgery.

A survey of 67 experienced orthopedic surgeons indicated that precise portal placement was the most important skill in arthroscopic surgery. However, none of the currently available virtual reality simulators include simulation / training in portal placement, including haptic feedback of the necessary puncture force. This study aimed to: (1) measure the in vivo force and stiffness during a portal placement procedure in an actual operating room and (2) implement active haptic simulation of a portal placement procedure using the measured in vivo data.

Septic arthritis associated with systemic sepsis.

Purpose: Septic arthritis presents with good joint function, but sometimes leads to poor outcomes. Concurrent systemic sepsis has been regarded as the poor outcome, and the exact cause remains unclear. This paper was performed to identify factors associated with concurrent systemic sepsis and to research results to predict poor outcomes in patients with septic arthritis.

Triangular Fixation Technique for Bicolumn Restoration in Treatment of Distal Humerus Intercondylar Fracture.

Background: Distal humerus intercondylar fractures are intra-articular and comminuted fractures involving soft tissue injury. As distal humerus is triangle-shaped, parallel plating coupled with articular fixation would be suitable for bicolumn restoration in treatment of distal humerus intercondylar fracture.

Methods: This study included 38 patients (15 males and 23 females) who underwent olecranon osteotomy, open reduction and internal fixation with the triangle-shaped cannulated screw and parallel locking plates (triangular fixation technique).

Arthroscopic modified Mason-Allen technique for large U- or L-shaped rotator cuff tears.

Purpose: While a conventional single- or double-row repair technique could be applied for repair of C-shaped tears, a different surgical strategy should be considered for repair of U- or L-shaped tears because they typically have complex patterns with anterior, posterior, or both mobile leaves. This study was performed to examine the outcomes of the modified Mason-Allen technique for footprint restoration in the treatment of large U- or L-shaped rotator cuff tears.

Methods: Thirty-two patients who underwent an arthroscopic modified Mason-Allen technique for large U- or L-shaped rotator cuff tears between January 2012 and December 2013 were included in this study.

Factors that Influence Reduction Loss in Proximal Humerus Fracture Surgery.

Objectives: This study was performed to identify the risk factors for reduction loss after locking plate fixation of proximal humerus fractures.

Design: Retrospective study.

Setting: University trauma center.

Arthroscopic all-intra-articular decompression and labral repair of paralabral cyst in the shoulder.

Background: The purpose of this study was to report the outcomes of all-intra-articular arthroscopic decompression and labral repair in patients with symptomatic paralabral cysts.

Methods: From 2005 to 2011, 20 consecutive cases of symptomatic paralabral cysts were included in this study. All surgical procedures were conducted with intra-articular arthroscopic decompression by use of a probe through the site of labral tear for cyst evacuation and suture anchor repair for the associated posterosuperior labrum.

Knot impingement after rotator cuff repair: is it real?

Purpose: The purpose of this study was to compare morphologic features of the acromion after 2 different repair methods (single-row [SR] repair with a minimum of 4 knots and suture-bridge [SB] repair with minimal knots) in medium to large rotator cuff tears.

Methods: From May 2005 to July 2012, 1,693 rotator cuff repairs were performed, among them medium to large tears requiring more than 2 anchors for repair; those who had 6-month postoperative magnetic resonance imaging (MRI) scans were included (221 shoulders). They were divided into 2 groups; group A (SR repair) and group B (SB repair).

Standard versus over-tensioning in the transfer of extensor indicis proprius to extensor pollicis longus for chronic rupture of the thumb extensor.

Purpose: The purpose of this study was to evaluate the functional outcomes of the over-tensioning technique compared with those of the standard tensioning technique in the transfer of extensor indicis proprius (EIP) to extensor pollicis longus (EPL) for the chronic rupture of the thumb extensor.

Methods: Data were collected from patients who underwent tendon transfer using EIP between March 2003 and August 2011. 23 were treated with the standard tensioning technique and 25 patients (Group B) with the over-tensioning technique.

Indirect reduction maneuver and minimally invasive approach for displaced proximal humerus fractures in elderly patients.

Background: This study examined the clinical outcomes of indirect reduction maneuver and minimally invasive approach for treating displaced proximal humerus fractures in patients older than 60.

Methods: Thirty-two patients (11 male and 21 female) who had undergone treatment for displaced proximal humerus fracture were evaluated. The mean age of the patients was 72.

An arthroscopic pleated capsular shift for recurrent anterior dislocation of the shoulder.

Purpose: This study examined the clinical results of an arthroscopic simple pleated capsular shift to treat severe recurrent anterior dislocation of the shoulder.

Methods: Twenty-four patients with anterior labroligamentous periosteal sleeve avulsion or advanced lesions who underwent an arthroscopic simple pleated capsular shift were included in this study. To create an arthroscopic simple pleated capsular shift, redundant capsules, including glenohumeral ligaments, were brought at least 1 cm lateral and 1 cm inferior and shifted to the prepared glenoid.