Effects of posterior tibial osteotomy inclination angle during total knee arthroplasty on postoperative range of motion and function

FU Yuan-feng; LI Jia-wei; LIU Xiao-qi

doi:10.3969/j.issn.1002-266X.2015.48.003

Abstract：Objective To investigate the effects of different posterior tibial osteotomy inclination angles on postopera -tive range of motion and function in patients after total knee arthroplasty .Methods Totally 101 cases of patients undergo-ing total knee arthroplasty were selected , including 50 cases used 5°posterior tibial osteotomy inclination angle ( observa-tion group) and 51 cases used that of 0°(control group).The patients in the two groups received the calf standard X-ray examination positively and laterally before and 6 months after surgery , then we measured the tibial angle , tilt angle after tibia, knee joint line height , maximum knee extension and flexion angles .The knee joint HSS score of the two groups was recorded before and at 4, 12 weeks of treatment and the complications after 6-month treamtment.Results The tibia angle, joint line height and maximum extension angle of the two groups after 6-month treamtment were decreased as compared with those before treatment .The posterior tibial slope angle , maximum flexion angle were all increased , and HSS scores were in-creased after 4 and 12 weeks of treatment .The above changes of the observation group were more significant than those of the control group (all P<0.01).The incidence of complications such as tibial plateau backward , shift down of patellar tendon, delayed fracture healing and severe abrasion of implant in the observation group was lower than that of the control group (all P<0.05).Conclusion During total knee arthroplasty, using 5°posterior tibial osteotomy inclination angle can improve the postoperative range of motion and function in patients after surgery , and its efficacy and safety is better than that of 0°.