Middle-term results of anatomic medullary locking total hip arthroplasty
| Autor: | S. Ohsawa, K. Fukuda, R. Ueno, H. Norimatsu, S. Mori, S. Matsushita |
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| Rok vydání: | 1998 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Medullary cavity Chirurgie orthopedique Arthroplasty Replacement Hip medicine.medical_treatment Dentistry Prosthesis Design Prosthesis Statistics Nonparametric Poor quality Bone quality medicine Humans Orthopedics and Sports Medicine Aged Retrospective Studies Observer Variation business.industry Bone Cements Femur Head General Medicine Middle Aged Stress shielding equipment and supplies Surgery Radiography Orthopedic surgery Female Hip Joint Hip Prosthesis business Follow-Up Studies Total hip arthroplasty |
| Zdroj: | Archives of Orthopaedic and Trauma Surgery. 118:14-20 |
| ISSN: | 1434-3916 0936-8051 |
| DOI: | 10.1007/s004020050302 |
| Popis: | We report the results of cementless, anatomic, medullary locking hip prosthesis application in our first consecutive series. We used the so-called Asian size of prosthesis with proportionally smaller stem sizes in both diameter and length. Forty-seven stems and sockets were analyzed with a mean follow-up of 69 months. The mean Merle d'Aubigné hip scores were 8 points preoperatively and 16 points at the final follow-up. Radiologically, the stems showed excellent stability without loosening. Stress shielding around the stems did occur in most cases but did not progress. Preoperative bone quality influenced the extent of stress shielding evaluated at the final follow-up: higher stress shielding was noted in poorer quality bones at the time of operation. There were problems with the sockets. The shallow socket and impingement at the protruded rim seemed to cause a high incidence of dislocation (13%). Massive polyethylene wear occurred in 5 sockets. These sockets were 48 and 46 mm in diameter with 26 mm heads. In conclusion, the stems of the anatomic medullary locking hip prostheses used in Japan showed satisfactory stability even in poor quality bones, but there were problems with the polyethylene liners. Our solution was to use larger sockets with 22 mm heads. |
| Databáze: | OpenAIRE |
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