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)
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)
Six patients with upper cervical spine ossicles and Down syndrome from a study population of 184 are described. The average age was 20.6 years at the time of diagnosis. Three of the patients were involved in tumbling. Radiographic anatomy of the ossicles and the dens, as well as serial radiographs in three of the six patients, suggest that this represents(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)
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)
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)
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)
The analysis of retrieved implant devices can provide information unavailable through any other method. With the variety of implant designs rapidly increasing, retrieval and analysis of failed cases is an important means of evaluating existing designs, as well as suggesting modifications that might improve implant performance. This paper describes a case in(More)
Polydactyly is considered either the most or second most (after syndactyly) common congenital hand abnormality. Polydactyly is not simply a duplication; the anatomy is abnormal with hypoplastic structures, abnormally contoured joints, and anomalous tendon and ligament insertions. There are many ways to classify polydactyly, and surgical options range from(More)