Component Size Matched Extension Gap Osteotomy for TKRA: A New Concept in Knee Osteotomy for TKRA / 대한정형외과학회잡지

ABSTRACT

PURPOSE: We designed a new osteotomy technique in order to get a consistent extension gap along with a tibial polyethelene insert in TKRA. The results were compared to the independent osteotomy technique. MATERIAL AND METHODS: Forty two patients were divided into an independent osteotomy group and a linked osteotomy group according to the technique adopted. In the linked osteotomy group, the extension gap was made by using a linker which was designed to provide a consistent gap between the distal femur and the proximal tibia during knee extension. The widths of the extension gap and the polyethylene thickness was compared between the two groups. RESULTS: The extension gap of the independent osteotomy group was 18.1 +/- 4.2 mm (2SD) and that of the linked femorotibial osteotomy group was 20.3 +/- 1.3 mm (2SD). The polyethylene thickness was 8.1 +/- 2.6 mm (2SD) in the independent group and 9.4 +/- 0.9 mm (2SD) in the linked group. CONCLUSION: This linked femorotibial osteotomy technique provided an improved method for obtaining a tibial insert matched extension gap in TKRA. This technique might also increase the longevity of the polyethylene insert.