Medicine and Health Sciences Commons^™

The Chevron Capitate-Trapezoid Joint: A Case Report, Dean W. Smith

Western Journal of Orthopaedics

Anatomical variations to the human skeletal system are common and frequently reported in the literature. The structures around the hand and wrist are no exception, and these variations can affect ligaments, tendons, muscles, nerves, arteries, joints, and bone morphology. Musculoskeletal health care providers must be familiar with normal, individual variations when encountered during patient care and diagnostic imaging. In some instances, morphological variations have resulted in differences in kinematics, while others have been found in association with certain medical conditions. We discuss an unusual variation of the capitate-trapezoid joint. To the best of our knowledge, no prior studies have previously …

Design, Development, Manufacturing And Biomechanical Testing Of Stand-Alone Cage For Posterior Lumbar Interbody Fusion, Fahad Alhelal

Electronic Thesis and Dissertation Repository

Introduction: The most common method of spinal fusion includes pedicle screws instrumentation, either with or without interbody cage fusion. This thesis aimed to develop and test a novel stand-alone intervertebral device that eliminates the need for pedicle screws and rods.

Method: The stand-alone cage was designed in collaboration with spinal surgeons and engineers using computer assisting drawings, and manufactured in titanium by 3D printing. Biomechanical testing comparing the stand-alone cage with standard posterior lumbar interbody fusion (PLIF) in sawbones (n=6) and cadavers (n=8).

Result: Compared to PLIF, the stand-alone cage demonstrated no significant difference in range of flexion, lateral bend …

Effects Of Revision Surgery On Grade Of Adverse Local Tissue Reaction Following Recall Of A Modular Hip Implant, Joseph F. Davies, Danielle M. Greer, Susan Truchan

Journal of Patient-Centered Research and Reviews

Background: The Stryker Rejuvenate modular hip implant device allows for greater versatility in matching a patient’s anatomy than conventional implants. Device recalls and in vivo metal hypersensitivity after total hip arthroplasty (THA) are common. However, recall of the Rejuvenate implant represents one of the largest recall volumes to date, highlighting our uncertainty regarding causes of device metal fretting/corrosion and adverse local tissue reaction (ALTR). While devices with metal-on-metal bearings historically were culprits for release of metal debris, more recently developed modular-neck devices add opportunity for adjacent metal components to rub together. With the Rejuvenate device, corrosion or fretting likely occurs …

Internal Hernia Of The Greater Omentum: Cadaveric Findings Of A Previously Unreported Variant., Andrea Andrea, Vy Tran, Cameron K Schmidt, Christian Fisahn, Joe Iwanaga, Rod J Oskouian, R Shane Tubbs

Articles, Abstracts, and Reports

Transomental hernias (TOHs) are a rare finding, constituting a fraction of all intestinal hernias. Here, we report the cadaveric discovery of a spontaneous TOH involving the sigmoid colon in an 82-year-old female and discuss the relevant literature. To our knowledge, a TOH involving the sigmoid colon has not been previously reported.

Undetected Small Accessory Mental Foramina Using Cone-Beam Computed Tomography., Joe Iwanaga, Koichi Watanabe, Tsuyoshi Saga, Shogo Kikuta, Yoko Tabira, Sadaharu Kitashima, Christian Fisahn, Fernando Alonso, R Shane Tubbs, Jingo Kusukawa, Koh-Ichi Yamaki

Articles, Abstracts, and Reports

INTRODUCTION: The accessory foramina could not be identified on some imaging modalities such as surface-rendered images. The purpose of this study was to investigate the ability of surface-rendered images in detecting these foramina.

MATERIALS AND METHODS: We analyzed 20 accessory mental foramina (AMF) in nine mandibles removed from cadavers with cone-beam computed tomography (CBCT) and assessed in surface-rendered images. All AMF were divided into three groups depending on their visibility.

RESULTS: Group 1 included AMF that were clearly visible as foramina, Group 2 were not clearly visible but could be recognized with concave parts, and Group 3 were not visible …

Knee Morphometric Risk Factors For Acute Anterior Cruciate Ligament Injury In Skeletally Immature Patients, Kenneth Aaron Shaw, Brian S. Dunoski, Neil J. Mardis, Donna M. Pacicca

Manuscripts, Articles, Book Chapters and Other Papers

© 2015, The Author(s).

Study design: Retrospective, case–control.

Purpose: Knee morphometric risk factors for noncontact anterior cruciate ligament (ACL) injury have been a popular topic with skeletally mature patients. Little research has focused on the skeletally immature, with conflicting conclusions. This study performs a comprehensive analysis of identified parameters thought to predispose to ACL injury in a skeletally immature cohort.

Methods: A retrospective review of pediatric patients undergoing knee magnetic resonance imaging (MRI) was performed over a 4-year period. Inclusionary criteria included mid-substance ACL disruption, skeletal immaturity, noncontact injury, without associated ligamentous disruption, and no medical condition associated with ligamentous …