Morphological and biomechanical aspects of Al2O3 ceramic joint replacement. Experimental results and design considerations for human endoprostheses
| Autor: | G. Heimke, Burkhard Krempien, Susanne Reipa, Hanns Andrian-Werburg, Hans J. Hartung, Peter Dr Med Griss, Hans J. Lauterbach |
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| Rok vydání: | 1975 |
| Předmět: |
Ceramics
medicine.medical_specialty Materials science Joint replacement Joint Prosthesis medicine.medical_treatment Biomedical Engineering High density Prosthesis Design Biomaterials Femoral head Flexural strength Osteogenesis medicine Animals Humans Ceramic Fixation (histology) Bone growth Hip Sheep Acetabulum Femur Head Surgery medicine.anatomical_structure visual_art visual_art.visual_art_medium Stress Mechanical Implant Aluminum Biomedical engineering |
| Zdroj: | Journal of Biomedical Materials Research. 9:177-188 |
| ISSN: | 1097-4636 0021-9304 |
| DOI: | 10.1002/jbm.820090421 |
| Popis: | Four different acetabular replacement designs and 2 femoral head replacement designs made out of high density alumina ceramic have been tested in sheep with postoperative survival times of up to 11 months (Frialit 99: Al2O3 99.6%, MgO 0.4%). It can be concluded from these experiments that a cement free implantation technique with alumina requires a primary rigid fixation of the implant to bone, with the possibility for new bone growth along the ceramic and into grooves and macroscopic holes for further interdigitation. Three different solutions for the acetabular component can be recommended for human application. In addition, an all ceramic femoral prosthesis has been tested for bending strength in its neck region. Twenty prostheses have been fractured, all of which showed values for bending strength far higher than the physiological neck fracture level (900 kp/cm2). The present state of development of all ceramic prostheses is discussed. Up to now, the development of fibrous tissue between the bone and the ceramic implant has caused reservations with human implantation. The direct definite anchorage problem has to be resolved first. |
| Databáze: | OpenAIRE |
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