| Summary: | 碩士 === 國立臺北科技大學 === 機電整合研究所 === 101 === Second operation for proximal tibial fractures is still exists in recent years unicompartmental knee arthroplasty clinical reports, it is insufficient about the influence of unicompartmental knee on tibia in biomechanical research, thus, this study is discuss proximal tibial stress changes after unicompartmental knee arthroplasty to simulate multiple force state on tibiofemoral joint acceptance unicompartmental knee arthroplasty.
This study through flexion in the tibiofemoral joint actions under the 0 ° gait for three different designs of unicompartmental knee, with a 1435 N and a 478 N
compression load applied on the medial and lateral tibial plateau consists with body weight 65kg to investigate the effects of mal-resection including varus/valgus tilt,posterior slope, pin hole of tibial cutting block and Tibial plateau extended sagittalsaw cuts.
Through this research results, implantation angle of the proximal end of the medial diaphysis indeed have occurs higher stress relative to the normal tibia. Different implant
angle caused the edges of cancellous bone or peg hole stress generated at higher on responsible for bearing tibial components tibial plateau. If pin hole violates proximal
end of the medial diaphysis will cause an excessive stress concentration in pin hole analysis. Extended sagittal saw cuts on tibial plateau will reduce fracture loads for tibial plateau case had higher stress on cortical bone. based on the reasons for reduce risk of proximal tibial fractures or collapsed of the tibial plateau, this study is still recommended tibial components varus/ valgus tilt alignment should avoid using more than 10 °and avoid pin hole violates proximal end of the medial diaphysis and extended sagittal saw cuts too deep in the surgery.
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