Conclusions Although total reoperation rates did not differ in the two population s , reoperation for bearing dislocation was more likely to occur in Asian than in Western patients , whereas reoperation for lateral knee OA progression was more likely to occur in Western than in Asian patients after Oxford Phase III UKA .
Background Implant survivorship is reported to be lower and complications , particularly bearing dislocation , are reported to be more frequent in Asian than in Western patients with medial knee osteoarthritis ( OA ) undergoing Oxford ® Phase III unicompartmental knee arthroplasty ( UKA ) .
To date , however , these complications have not been compared between these groups of patients .
Questions / purpose s The purpose of this study was to perform a meta- analysis comparing the st and ardized incidence rates of ( 1 ) all-cause reoperation ; ( 2 ) reoperation related to bearing dislocation ; and ( 3 ) reoperation related to progression of lateral compartment arthritis in Asian and Western patients with medial knee OA who underwent Oxford Phase III UKA .
Unicompartmental knee arthroplasty compares favorably to total knee arthroplasty in the same patient.
There are several surgical management options for medial knee arthritis , and it is often difficult to decide whether a unicompartmental knee arthroplasty ( UKA ) or total knee arthroplasty ( TKA ) is appropriate . Few studies have compared UKAs and TKAs in the same patient . We identified 23 patients with osteoarthritis who had a TKA on one side and a UKA on the other . The preoperative values of the 2 knees were not statistically different . Strict criteria were used to determine whether a UKA could be performed ( functional anterior cruciate ligament , minimal deformity , and minimum changes in other compartments ) . Preoperative radiographs were review ed to confirm that the knee undergoing TKA had medial compartment disease only . Knee Society scores , radiographic analysis , and patient preferences were recorded for all patients . Average follow-up was 46 months ( range , 7.2 - 148 months ) and 42 months ( range , 11.5 - 59.8 months ) for TKA and UKA , respectively . We found little or no difference in outcomes between the 2 procedures , except for an improved range of motion with the UKA compared with the TKA ( 123 degrees + /-9 degrees vs 119.8 degrees + /-7 degrees , respectively ) . Knee Society scores improved from 45.9 to 89.7 in UKA and from 42.4 to 90.3 in TKA . Of the 23 patients , 11 expressed no preference between either knee and 12 preferred the unicompartmental knee ; no patient preferred the total knee . With appropriate patient selection , UKAs are a successful option for patients with osteoarthritis
Conclusions Although total reoperation rates did not differ in the two population s , reoperation for bearing dislocation was more likely to occur in Asian than in Western patients , whereas reoperation for lateral knee OA progression was more likely to occur in Western than in Asian patients after Oxford Phase III UKA .
Background Implant survivorship is reported to be lower and complications , particularly bearing dislocation , are reported to be more frequent in Asian than in Western patients with medial knee osteoarthritis ( OA ) undergoing Oxford ® Phase III unicompartmental knee arthroplasty ( UKA ) .
To date , however , these complications have not been compared between these groups of patients .
Questions / purpose s The purpose of this study was to perform a meta- analysis comparing the st and ardized incidence rates of ( 1 ) all-cause reoperation ; ( 2 ) reoperation related to bearing dislocation ; and ( 3 ) reoperation related to progression of lateral compartment arthritis in Asian and Western patients with medial knee OA who underwent Oxford Phase III UKA .