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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Isaacs, Jonathan E. Yen Shipley, Nancy Owen, John R. Owings, F. Patterson Wayne, Jennifer S. |
| Description | Country affiliation: United States Author Affiliation: Isaacs JE ( Department of Orthopaedic Surgery, Virginia Commonwealth University Health System, Richmond, VA 23298, USA. jisaacs@mcvh-vcu.edu) |
| Abstract | PURPOSE: Radioscapholunate arthrodesis is an accepted treatment for posttraumatic radiocarpal arthritis that preserves some wrist motion. Good results are dependent on secure fixation while avoiding hardware-related side effects. A small radiolucent countersunk circular plate placed over the radiocarpal joint may offer a low-profile technique for achieving secure fixation of the radioscapholunate joint. The purpose of this study was to compare the biomechanical performance of this circular plate, when applied in this manner, to that of a more conventional fixation technique such as a 3.5-mm T-plate. METHODS: Ten pairs of fresh-frozen cadaveric wrists were amputated 7 cm proximal to the radiocarpal joint. One wrist from each pair was fixed with a T-plate (DePuy, Inc., Warsaw, IN), and the contralateral wrist was fixed with a circular plate (Xpode plate; TriMed, Inc., Valencia, CA). The radius and scaphoid-lunate complex were each rigidly held and mounted into a materials testing machine. Translational forces to mimic extension and flexion movements were applied cyclically for 40 cycles, followed by failure testing in extension. RESULTS: Cyclic tests revealed no statistically significant differences between the 2 fixation plates although resistance to flexion motion was higher than resistance to extension motion. The average load at failure was no different between the T-plate and circular plate. However, a ratio of the failure loads (T-plate to circular plate) demonstrated a 58% higher load for the circular plate. CONCLUSIONS: A countersunk circular plate provides similar biomechanical performance to the T-plate for radioscapholunate arthrodesis. |
| File Format | HTM / HTML |
| ISSN | 03635023 |
| Issue Number | 10 |
| Volume Number | 33 |
| e-ISSN | 15316564 |
| Journal | The Journal of Hand Surgery |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2008-12-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Surgery Arthrodesis Instrumentation Bone Plates Materials Testing Wrist Joint Cadaver Equipment Failure Analysis Humans Prosthesis Design Tensile Strength Weight-bearing Comparative Study Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Orthopedics and Sports Medicine Surgery |
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