The Change of Proximal Reference of Tibial Plateau in Total Knee Replacement: The Cadaveric Study.
- Author:
Woo Dong NAM
1
;
Kee Hyung RHYU
;
Kye Young HAN
Author Information
1. Department of Orthopaedic Surgery, College of Medicine, Kangwon National University Chuncheon, Korea. hkyljh@kangwon.ac.kr
- Publication Type:Original Article
- Keywords:
Tibia;
Lateral intercondylar eminence;
Varus;
Total knee arthroplasty;
Tibial osteotomy
- MeSH:
Arthroplasty;
Arthroplasty, Replacement, Knee*;
Axis, Cervical Vertebra;
Cadaver*;
Incidence;
Knee;
Osteotomy;
Prostheses and Implants;
Tibia;
X-Ray Film
- From:Journal of the Korean Knee Society
2005;17(1):69-72
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: We frequently observed varus cutting of tibia in total knee arthroplasty. And we found that the extension of the tibial shaft axis often reach the lateral intercondylar eminence. So right tibias were osteotomized as usual manner and left tibias were osteotomized as the proximal reference point of cutting at the lateral intercondylar eminence, then we compared the differences. MATERIALS AND METHODS: By using 6 cadavers, right tibias were osteotomized as usual manner and left tibias were osteotomized as the proximal reference point of cutting at the lateral intercondylar eminence. Tibial prosthesis were implanted after measuring the thickness of cut tibial condyles. The radiological examinations were accomplished pre- and postoperatively. With postoperative X-ray films, we measured the angles between the perpendicular line to the prosthesis and shaft axis/mechanical axis. RESULTS: The mediolateral differences of cut tibial condyles were not statistically different between right and left tibias. The right angles between the perpendicular line to the prosthesis and shaft axis/mechanical axis were measured average varus 1.00 and 1.08 degree and left angles average varus 0.25 and 0.17 degree, so no statistical differences were observed(p=0.066, 0.066). CONCLUSIONS: Although no statistical differences, we could get more stable alignment by valgus osteotomy and somewhat low incidences of varus cutting were observed. In the future more studies would be required by using varus deformed tibias.
