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ASAP total knee arthroplasty instrumentation: all six, all precise?
W J Campbell1, J R Elliott, R A Mollan
1Department of Surgery, Belfast City Hospital, UK.
Journal of the Royal College of Surgeons of Edinburgh
|October 1, 1993
Summary
This study shows that the All Six, All Precise (ASAP) instrumentation simplifies total knee replacement surgery. Careful use of the ASAP system achieved accurate postoperative coronal alignment in TKR patients.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Total knee replacement (TKR) aims to restore joint function and alignment.
- Accurate coronal alignment is crucial for TKR outcomes.
- Existing instrumentation may present challenges in achieving precise bone cuts.
Purpose of the Study:
- To evaluate the efficacy of the Richards Tricon Total Knee System with ASAP instrumentation for TKR.
- To assess the system's ability to achieve a target postoperative coronal tibio-femoral alignment of 7 degrees valgus.
- To determine if the ASAP system simplifies TKR technique while maintaining accuracy.
Main Methods:
- Retrospective analysis of 30 consecutive TKR cases using the Richards Tricon Total Knee System with ASAP instrumentation.
- Preoperative and postoperative coronal alignment measured via long-leg anteroposterior X-rays.
- Intraoperative films used to assess femoral and tibial bone cuts in the coronal plane.
Main Results:
- Mean preoperative coronal alignment was 1 degree valgus (SD = +/- 13.5 degrees).
- Mean postoperative coronal alignment achieved was 8 degrees valgus (SD = +/- 5.6 degrees).
- The ASAP system facilitated accurate bone cuts and alignment.
Conclusions:
- The ASAP instrumentation simplifies the total knee replacement procedure.
- Careful application of the ASAP system allows for accurate postoperative coronal alignment.
- The Richards Tricon Total Knee System with ASAP instrumentation is effective for TKR.