슬관절 전치환수술에서 고식적 방법과 네비게이션을 이용한 방법 간의 삽입물 계측치 비교분석

Abstract

Purpose: To evaluate usefulness of Navigation system by comparing the radiographic results of femoral and tibial component position between conventional total knee replacement (TKA) and Navigation-assisted TKA. Materials and Methods: From December 2003 to January 2006, TKA with Scorpio?(Osteonics, NJ, USA) were preformed for 53 knees of 41 patients. Among them, 26 knees (Group A) were operated by conventional TKA and 27 knees (Group B) were by Navigation-assisted TKA. We measured the femoro-tibial angle (Ω), femoral component coronal (α) and sagittal angle(γ), tibial component coronal (β) and sagittal angle (δ) according to the radiographic evaluation of American Knee Society. We also measured the coronal femoral component angle to the femoral mechanical axis (θ) and femoro-tibial mechanical axis. Results: α, Ω and θ angle showed no significant difference between two groups (p>0.05). β, γ and δ angle were 89.2±1.9, 4.3±1.7, 81.4±2.9 degree in group A and 90.5±1.2, 2.8±1.6, 86.6±2.2 degree in group B, respectively. There was statistically significant difference in β, γ and δ angle (p<0.05). The range of deviation from desired angle showed no significant difference in femoro-tibial mechanical axis and β angle. However, there was statistically significant difference in θ angle with more accuracy in group B (p=0.0001) Conclusion: There were statistically significant differences in β and γ angle between conventional TKA and Navigation assisted TKA. We could get more accurate femoral component coronal angle to the mechanical axis with the Navigation system.