Posts

Dr. Lederman and colleagues present a study comparing new techniques for rotator cuff repair!

Title: Triple-Loaded Suture Anchors Versus a Knotless Rip Stop Construct in a Single-Row Rotator Cuff Repair Model

Matthew Noyes, MD, Christopher Adams MD, Evan S. Lederman MD, Patrick Denard MD

Purpose

To compare the biomechanical properties of single-row repair with triple-loaded (TL) anchor repair versus a knotless rip stop (KRS) repair in a rotator cuff repair model.

Full article link below.

The Journal of Arthroscopy and Related Research: 2018 Feb 15. pii: S0749-8063(18)30029-X. doi: 10.1016/j.arthro.2017.12.024. [Epub ahead of print]

https://www.arthroscopyjournal.org/article/S0749-8063(18)30029-X/fulltext

Dr. Evan Lederman and colleagues review how bone reacts to shoulder replacements and propose a classification system for critical review of implant/bone interaction

Title: Stress shielding of the humerus in press-fit anatomic shoulder arthroplasty: review and recommendations for evaluation

Patrick Denard MD, Patric Raiss MD, Reuben Gobezie MD, T. Bradley Edwards MD, Evan S. Lederman MD

Introduction

Uncemented press-fit humeral stems were developed with the goal of decreasing operative time, preserving bone stock, and easing revision. In recent years, short stems and stemless humeral implants have also become available. These press-fit humeral implants have varying designs that can lead to changes in stress distribution in the proximal humerus. Such stress shielding manifests as bony adaptations and may affect long-term functional outcome and the ability to perform revision. However, current studies of humeral fixation during total shoulder arthroplasty are complicated because a variety of classification systems have been used to report findings.

Full article link below.

Journal of Shoulder and Elbow Surgery E-pub February 6, 2018

https://doi.org/10.1016/j.jse.2017.12.020

Dr. Lederman and colleagues discuss the outcome of a subscapularis peel repair with a stem-based repair after total shoulder arthroplasty

Title: Healing and functional outcome of a subscapularis peel repair with a stem-based repair after total shoulder arthroplasty

Reuben Gobezie MD, Patrick Denard MD, Yousef Shishani MD, Anthony Romeo MD, Evan S. Lederman MD

Background

The purpose of this study was to evaluate functional outcome and healing of a subscapularis peel with a stem-based repair after total shoulder arthroplasty (TSA). The hypothesis was that the repair would lead to subscapularis healing in the majority of cases.

Full article: https://doi.org/10.1016/j.jse.2017.02.013

Journal of Shoulder and Elbow Surgery

Volume 26, Issue 9, September 2017, Pages 1603-1608

Dr Lederman, Dr Harmsen and colleagues review strategies to prevent infection in shoulder replacement. *

Title: Preventing infection in shoulder arthroplasty: Navigating the minefields

Abstract

Periprosthetic infection after shoulder arthroplasty represents a devastating complication that often requires extensive revision surgery with substantial economic and patient burden, and ultimately leads to reduced patient function.

Seminars in Arthroplasty

Volume 28, Issue 3, September 2017, Pages 145-149

https://doi.org/10.1053/j.sart.2017.12.006

*This is based on a lecture by Dr Lederman at the 2017 Current Concepts in Shoulder Arthroplasty conference in Las Vegas, NV.

Dr. Lederman, Dr. Lund and former fellows have described a new class of labral tears in the shoulder*

Title: The Glenoid Labral Articular Teardrop Lesion: A Chondrolabral Injury With Distinct Magnetic Resonance Imaging Findings

Evan S. Lederman MD, Stephen Flores MD, Christopher Stevens MD, Damien Richardson MD, Pamela Lund MD

*Identification of this lesion of MRI can help in diagnosis and treatment of labral tears.

Purpose

Evaluation and description of a pathognomonic lesion identified on magnetic resonance imaging (MRI) of a chondrolabral injury of the glenohumeral joint.

Methods

Patients were prospectively identified at the time of MRI by a characteristic teardrop appearance of a pedicled displaced chondrolabral flap in the axillary recess on coronal imaging and retrospectively reviewed.

Full article: https://doi.org/10.1016/j.arthro.2017.08.236

Arthroscopy: The Journal of Arthroscopic & Related Surgery

Volume 34, Issue 2, February 2018, Pages 407-411

 

Dr. Lederman and Dr. Harmsen discuss the challenges and techniques for revision shoulder replacement.*

Title: Humeral cemented revision: Techniques for safe extraction

Samuel Harmsen MD, Evan S. Lederman MD

Abstract

Removing a well-fixed humeral component in revision shoulder arthroplasty can present a difficult challenge. Intraoperative complications including iatrogenic fracture, humeral perforation, segmental bone loss, nerve and soft tissue injury can occur. These complications can occur with both cemented and press-fitted stems and can lead to increased morbidity and decreased functional outcomes. Complete removal of the cement mantle and cement restrictor, when necessary, can present even further challenges. Several extraction techniques have been described that can help minimize complications and enable safe, complete component extraction.

Seminars in Arthroplasty

Volume 28, Issue 3, September 2017, Pages 175-179
*This is based on a lecture by Dr. Lederman at the 2017 Current Concepts in Shoulder Arthroplasty Conference in Las Vegas, NV.

Dr. Lederman and colleagues review how bone reacts to shoulder replacements and document the potential benefit and safety of short stem shoulder implants

Title: Radiographic changes differ between two different short press-fit humeral stem designs in total shoulder arthroplasty

Patrick J. Denard MD, Matthew P Noyes MD, J B Walker MD, Youself Shishani MD, Reuben Gobezie MD, Anthony A Romeo MD, Evan S. Lederman MD

Background

The purpose of this study was to compare the radiographic changes of the humerus in the short term after total shoulder arthroplasty with two different short-stem humeral components. The hypothesis was that there would be no difference in radiographic changes or functional outcome based on component type.

Full article available: https://doi.org/10.1016/j.jse.2017.08.010

The Journal of Shoulder and Elbow Surgery

Volume 27, Issue 2, February 2018, Pages 217-223

 

Dr. Josh Vella – 5th Annual World Congress in Orthopedics-2018

Dr. Josh C. Vella, TOCA Hand and Upper Extremity Surgeon, is honored to carry the distinction of becoming an international lecturer at the 5th Annual World Congress in Orthopedics-2018 in Milan, Italy.

He was one of a few distinguished international lecturers who discussed various new treatment options with the theme of this years conference “Breaking Barriers in Orthopedic Research”.

Photo: Dr. Josh C. Vella (center), Dr Michael Boland (right) of The Hand Institute, University of Auckland, New Zealand and Dr  Scott Fried (left) in collaboration with Thomas Jefferson University Hand Center in Philadelphia.

Dr. Padley has a long tradition of providing care for sports teams.

Dr. Padley returned to the Dominican Republic in April with the Cincinnati Reds for the annual opening of their Dominican complex. The trip included evaluations of 40+ Dominican athletes hoping to advance their way up the Cincinnati Reds baseball system. This marks the beginning of the baseball season for the Dominican teams. Most major league baseball teams have affiliates in the Dominican in search of that next great player! Dr. Padley is an orthopedic consultant and provider to the Cincinnati Reds for major league baseball spring training and throughout the year for their minor league and rookie league teams. In additional to this health care relationship, he is also a consultant to Japanese professional baseball for the Saitama Seibu Lions. With his expertise in hip disorders and injuries, Ballet Arizona benefits from his service as a consultant. He was a team physician for the WNBA’s Phoenix Mercury for four years including the 2014 championship season. Dr. Padley proudly serves as the team physician for Benedictine University in Mesa as well as Millennium and Verrado High Schools in Goodyear.

For more information on Dr. Padley, Click HERE

 

Congratulations to Dr. Evan Lederman for his recent publication!

Title: The Evolution of the Superior Capsular Reconstruction Technique

Alan M. Hirahara, MD, FRCSC; Evan S. Lederman, MD; Wyatt J. Andersen, ATC; and Kyle Yamashiro, PT, DPT, CSCS

Introduction

Irreparable, massive rotator cuff tears can result in unacceptable functional deficits in patients. When the supraspinatus tears and retracts medially, the superior capsule is also disrupted, and superior constraint is lost. With no superior restraint to the humerus, the humeral head migrates superiorly, causing a decrease in the acromial-humeral distance. [1-4]

Biomechanical analysis has shown that a defect in the superior capsule results in a minimum 200% greater glenohumeral superior translation and subacromial peak contact pressure compared with an intact capsule. [3] The malposition of the humeral head leads to functional abnormalities and pseudoparalysis.

Numerous proposed treatments for massive rotator cuff tears – including debridement and tenotomy, tendon transfers, and reverse total shoulder arthroplasty – have yielded mixed results and high complication rates. [5-12] In particular, reverse shoulder arthroplasty can result in humeral or glenoid fractures, persistent anterior or posterior instabilities, loosening of the glenoid or humeral cemented components, dislocations, and infection. [5-7]

The superior capsular reconstruction (SCR) was described by Hanada et al [13] in 1993 and by Mihata et al [1] in 2013 as an alternative procedure to increase function and decrease pain by restoring the restraint mechanisms in the shoulder. Using a graft to recreate the superior capsule, the humeral head is centered in the glenoid, allowing the larger muscles (ie, deltoid, latissimus dorsi, and pectoralis major) to function appropriately. Mihata et al [3,4] have found that the SCR reduces glenohumeral superior translation and subacromial contact force.

Full article link below.

ICJR.net  March 2018