Orthopedics Commons^™

Transgenic Mice Overexpressing Human Tnf-Α Experience Early Onset Spontaneous Intervertebral Disc Herniation In The Absence Of Overt Degeneration., Deborah J. Gorth, Irving M. Shapiro, Makarand V. Risbud

Department of Orthopaedic Surgery Faculty Papers

There is a well-established link between cytokine expression and the progression of intervertebral disc degeneration. Among these cytokines, interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) are the most commonly studied. To investigate whether systemic hTNF-α overexpression affects intervertebral disc health, we studied the spine phenotype of Tg197 mice, a widely used hTNF-α transgenic line. These mice were studied at 12-16 weeks of age using comprehensive histochemical and immunohistological analysis of the spinal motion segment. Micro-CT analysis was performed to quantify vertebral trabecular bone architecture. The Tg197 mice evidenced spontaneous annular tears and herniation with increased vascularity in subchondral bone and …

A Us Hospital Budget Impact Analysis Of A Skin Closure System Compared With Standard Of Care In Hip And Knee Arthroplasty., Kay Sadik, Jana Flener, Jeanine Gargiulo, Zachary D. Post, Steven Wurzelbacher, Andrew Hogan, Sarah Hollmann, Nicole Ferko

Department of Orthopaedic Surgery Faculty Papers

Background: Medicare's mandatory bundle for hip and knee arthroplasty necessitates provider accountability for quality and cost of care to 90 days, and wound closure may be a key area of consideration. The DERMABOND

Methods: A 90-day economic model was developed assuming 500 annual hip/knee arthroplasties for a typical US hospital setting. In current practice, wound closure methods for the final skin layer were set to 50% sutures and 50% staples. In future practice, this distribution shifted to 20% sutures, 20% staples, and 60% Skin Closure System. Health care resources included materials (eg, staplers, steri-strips, and traditional/barbed sutures), standard or premium …

Isolated Gonococcal Extensor Tenosynovitis, Cory Lebowitz, Jonas Matzon

Department of Orthopaedic Surgery Faculty Papers

Neisseria gonorrhoeae is a mucosal infection that has the propensity to disseminate, causing symptoms that commonly include arthralgias, skin lesions, fevers, chills, dysuria, genital discharge, septic arthritis, and/or tenosynovitis. Typically, gonococcal tenosynovitis affects the flexor sheath and is associated with arthralgias, skin lesions, or both. To the best of our knowledge, there has not been a documented case of isolated gonococcal extensor tenosynovitis. We report the case of a 16-year-old boy with isolated left upper-extremity gonococcal extensor tenosynovitis who was successfully treated with surgical debridement and antibiotic therapy.

Cox-2 Expression Mediated By Calcium-Tonebp Signaling Axis Under Hyperosmotic Conditions Serves Osmoprotective Function In Nucleus Pulposus Cells., Hyowon Choi, Weera Chaiyamongkol, Alexandra C. Doolittle, Zariel I. Johnson, Shilpa S. Gogate, Zachary R. Schoepflin, Irving M. Shapiro, Makarand V. Risbud

Department of Orthopaedic Surgery Faculty Papers

The nucleus pulposus (NP) of intervertebral discs experiences dynamic changes in tissue osmolarity because of diurnal loading of the spine. TonEBP/NFAT5 is a transcription factor that is critical in osmoregulation as well as survival of NP cells in the hyperosmotic milieu. The goal of this study was to investigate whether cyclooxygenase-2 (COX-2) expression is osmoresponsive and dependent on TonEBP, and whether it serves an osmoprotective role. NP cells up-regulated COX-2 expression in hyperosmotic media. The induction of COX-2 depended on elevation of intracellular calcium levels and p38 MAPK pathway, but independent of calcineurin signaling as well as MEK/ERK and JNK …

What Are Biofilms?, Noreen J. Hickok

Department of Orthopaedic Surgery Faculty Papers

No abstract provided.

A New Mini-Navigation Tool Allows Accurate Component Placement During Anterior Total Hip Arthroplasty., Javad Parvizi Md, Jessica R. Benson, Jeffrey M. Muir

Department of Orthopaedic Surgery Faculty Papers

Introduction: Computer-assisted navigation systems have been explored in total hip arthroplasty (THA) to improve component positioning. While these systems traditionally rely on anterior pelvic plane registration, variances in soft tissue thickness overlying anatomical landmarks can lead to registration error, and the supine coronal plane has instead been proposed. The purpose of this study was to evaluate the accuracy of a novel navigation tool, using registration of the anterior pelvic plane or supine coronal plane during simulated anterior THA.

Methods: Measurements regarding the acetabular component position, and changes in leg length and offset were recorded. Benchtop phantoms and target measurement values …

Double-Row Repair Technique For Bursal-Sided Partial-Thickness Rotator Cuff Tears, Hytham Salem, Aaron Carter, Md, Fotios Tjoumakaris, Kevin Freedman

Department of Orthopaedic Surgery Faculty Papers

Rotator cuff pathology is a common cause of shoulder pain in the athletic and general population. Partial-thickness rotator cuff tears (PTRCT) are commonly encountered and can be bursal-sided, articular-sided, or intratendinous. Various techniques exist for the repair of bursal-sided PTRCTs. The 2 main distinctions when addressing these lesions include tear completion versus preservation of the intact fibers, and single- versus double-row suture anchor fixation. We present our method for addressing bursal-sided PTRCTs using an in situ repair technique with double-row suture anchors. © 2017 Arthroscopy Association of North America

Management Of Elbow Dislocations In The National Football League., Edward S. Chang, Meghan Bishop, Christopher C. Dodson, Peter F. Deluca, Michael G. Ciccotti, Steven B. Cohen, Matthew L. Ramsey

Department of Orthopaedic Surgery Faculty Papers

Background: Although much literature exists regarding the treatment and management of elbow dislocations in the general population, little information is available regarding management in the athletic population. Furthermore, no literature is available regarding the postinjury treatment and timing of return to play in the contact or professional athlete.

Purpose: To review the clinical course of elbow dislocations in professional football players and determine the timing of return to full participation.

Study Design: Case series; Level of evidence, 4.

Methods: All National Football League (NFL) athletes with elbow dislocations from 2000 through 2011 who returned to play during the season were …