Artikel
Is the Kinematic Orthopilot Press-Fit Cup Navigation suitable for use after Pelvis or Acetabulum Injuries?
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Autoren
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Milos Janecek
- Traumatological Hospital Brno, Ponavka 6, 662 50, Brno, Phone: +420 545 538 382, Fax: +420 545 211 082
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M. Pink
- Hospital Trebic, Czech Rep.
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R. Hart
- Traumatological Hospital Brno, Czech Rep.
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P. Bucek
- Traumatological Hospital Brno, Czech Rep.
| Veröffentlicht: | 11. November 2003 |
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Gliederung
Text
The results of total hip arthroplasties are depended on many factors.The cup orientation is one of the most important aspects influencing not only to replacement stability but also to polyethylene wear and long-term results. The purpose is to evaluate the position of press-fit cup in both sagittal and frontal planes in patients with posttraumatic osteoarthritis. From Oct.2001 to Oct.2002 a prospective radiological study was performed in 10hips with severe posttraumatic osteoarthritis after pelvis injury. Patients had the press-fit Plasmacup implanted with use of OrthoPilot navigation. This CT-free kinematic navigation gives information about reaming depth and cup orientation. In the control group 20 Plasmacups were navigated in cases with primary osteoarthritis with the same Orthopilot navigation system. All patients were followed with standard AP radiographs of the pelvis. The acetabular cup inclination and anteversion was measured according to the method of Ackland et al.
No dislocation occured in our patients. In the first group, we found out the range of inclination of the navigated cups from 30° to 49°. The anteversion ranged from 7° to 22°.In the control group, we measured the inclination between 42°and 45° and the anteversion between 11°and 15°.
Kinematic navigation OrthoPilot affords a possibility to place acetabular component very precisely not only in standard procedures but also in cases with severe structural abnormalities after pelvis or acetabulum trauma.Accurate position of the cup has an influence to the longer survival of the implant.
