Clinical Application Of Oxford Unicompartmental Knee Arthroplasty By Using Kinematic Alignment Technique Based On Tibial Side Osteotomy
Objective To compare the trajectory of bearing movement,clinical outcomes,and radiological presentations between the kinematic alignment(KA)technique based on tibial side osteotomy and lower limb line,and the microplasty(MP)technique in Oxford unicompartmental knee arthroplasty(OUKA).Methods We retrospectively analyzed patients who underwent OUKA from April 2021 to August 2023.Among them,there were 9 males(10 knees)and 29 females(30 knees),aged 50 to 85 years old,with an average age of(63.08±8.52)years.There were 19 cases involving the left knee and 21 cases involving the right knee.Of these,19 patients(20 knees)underwent OUKA using the kinematic alignment technique(KA group),while the other 19 patients(20 knees)received OUKA using the microplasty technique(MP group).The motion trajectories of the two groups'mobile bearings were compared by measuring the distance they moved during flexion and extension.Intraoperative bearing movement mode,motion distance,clinical outcomes,and radiographic data were also compared between the two groups.Results Both groups of patients were followed up for an average of(20.36±3.75)months,ranging from 8 to 36 months.There were no significant differences in the distance the mobile bearing moved during flexion and extension between the two groups.However,the KA group demonstrated a significantly superior bearing movement trajectory compared to the MP group(P＜0.05).Radiographically,the hip-knee-ankle(HKA)angle significantly decreased postoperatively in both groups compared to preoperatively(P＜0.001),with no significant differences between the two groups(P＞0.05).In terms of femoral component flexion-extension angle,tibial plateau posterior slope,and relative obliqueness of the femoral and tibial components,there were no significant differences between the KA and MP groups(P＞0.05).However,the KA group showed significantly closer contiguity of the components and more accurate varus-valgus angles of the femoral and tibial components compared to the MP group(P＜0.001).Regarding clinical outcomes,the KA group was significantly superior to the MP group in terms of intraoperative blood loss,length of incision,and operation time(P＜0.001).Conclusion Although both the kinematic alignment and microplasty techniques achieve similar prosthetic installation accuracy and clinical outcomes in OUKA,the kinematic alignment technique provides a more optimal bearing movement trajectory and aligns more closely with the concept of rapid rehabilitation.
Oxford unicompartmental knee arthroplastykinematic alignment techniquebearing movement trajectoryknee anteromedial osteoarthritis
万方数据
维普
