Morphometry of the Cut Surface of the Proximal Tibia for Total Knee Arthroplasty in Korea / 대한정형외과연구학회지

ABSTRACT

PURPOSE: To provide the morphometric data about the Korean proximal tibia to design a total knee prosthesis for Korean population. MATERIALS AND METHODS: We measured morphologic data from the proximal part of the tibia from 60 knees of 30 male and 30 female cadavers. The 3D images were reconstructed from the data obtained by computed tomography scanning from femoral head to ankle joint. These image were processed as a ideal tibial resection surface which was made during a total knee arthroplasty operation. Then, antero-posterior lengths, medio-lateral lengths and aspect ratios of the cut surface were measured. Measurements were analyzed and compared with those of five popular total knee prosthesis models. RESULTS: The average medio-lateral length, lateral antero-posterior length, aspect ratio of male was 79.4 +/- 3.8 mm, 39.6 +/- 5.0 mm, 49.8 +/- 5.1% respectively. And that of female was 70.4 +/- 3.7 mm, 34.3 +/- 3.6 mm, 48.8 +/- 4.7% respectively. Component size of medio-lateral length of 65~85 mm and lateral antero-posterior length of 30~45 mm, would be required for the Korean population. Aspect ratios were correlated to antero-posterior lengths positively (p < 0.05). CONCLUSION: No prostheses had fulfilled all the requirements for Korean knees in this study. These data could be used for design the optimal components for Korean.