Jake Edmunds

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This review article describes the anatomy of the thumb trapeziometacarpal joint. In the final phase of opposition screw home torque rotation of the volar beak of the thumb metacarpal in the pivot area of the trapezium recess and tension on the dorsal ligament complex create stability for power pinch and power grip. The resulting compressive shear forces can(More)
Five fresh nonembalmed elbows were tested for resistance to valgus stress in their anatomic state, after radial head resection, and after insertion of Silastic and polymethylmethacrylate (PMMA) radial head replacements. The resistance to valgus stress was found to be reduced an average of 28% after radial head resection. The PMMA and Silastic implants(More)
We studied the radiographs of thirty-two patients with Down syndrome for evidence of atlanto-axial instability. One of the patients had instability in 1970 and seven had it in 1983. The interval between the atlas and the odontoid process in the patients who demonstrated motion at that interval radiographically averaged 2.78 millimeters in 1970 and 6.93(More)
A 56 year old man was seen because of recurrent right shoulder hemarthroses and a superior vena caval syndrome. Intermittent symptoms had occurred for six years and resulted in marked destructive changes in the right shoulder. Arthroscopy added pathological evidence of this unusual mechanism of arthropathy. Patients on anticoagulants deserve close attention(More)
The surgeon treating traumatic injuries to the TMC joint should be aware of the fundamental misconceptions and pervasive axiomatic myths perpetuated in the medical literature: namely that the volar beak ligament is the prime stabilizer, that the dorsal ligament complex plays no significant role in TMC joint function, and that the APL is a deforming force in(More)
In 2008, Wyoming was ranked 8th in barley production and 20th in hay production in the United States and these crops support Wyoming's $800 million cattle industry. However, with a mean elevation of 2,040 meters, much of Wyoming has a limited crop growing season (as little as 60 days) and relies on late-summer and early-fall streamflow for agricultural(More)
A retrospective study was conducted to evaluate the long-term effectiveness of wrist arthroplasties in patients with various arthritic conditions. A total of 39 wrist arthroplasties were performed in 29 patients (average age, 52.5 years) by the orthopedic staff at Tulane University School of Medicine. Rheumatoid arthritis was the major presenting diagnosis(More)
Most orthopaedic surgeons are unfamiliar with proton therapy or the difference between proton radiation and photon (X-ray) radiation. After they perform a total hip replacement or metallic hip implant, their patient cannot have proton therapy for prostate cancer because the protons must pass exclusively through the hips and are blocked by metal. Proton(More)
An uncemented porous-coated humeral component, which functioned in vivo for over 2 1/2 years, was retrieved postmortem and examined histologically. Radiographs of the specimen revealed close approximation to the endosteal cortex medially and laterally. Apposition was limited or absent anteriorly and posteriorly. The overall extent of bone ingrowth was(More)