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 .
Oxford phase 3 unicompartmental knee replacement in Korean patients.
Medium-term survivorship of the Oxford phase 3 unicompartmental knee replacement ( UKR ) has not yet been established in an Asian population . We prospect ively evaluated the outcome of 400 phase 3 Oxford UKRs in 320 Korean patients with a mean age at the time of operation of 69 years ( 48 to 82 ) . The mean follow-up was 5.2 years ( 1 to 10 ) . Clinical and radiological assessment was carried out pre- and post-operatively . At five years , the mean Knee Society knee and functional scores had increased significantly from 56.2 ( 30 to 91 ) pre-operatively to 87.2 ( 59 to 98 ) ( p = 0.034 ) and from 59.2 ( 30 to 93 ) to 88.3 ( 50 to 100 ) ( p = 0.021 ) , respectively . The Oxford knee score increased from a mean of 25.8 ( 12 to 39 ) pre-operatively to 39.8 ( 25 to 58 ) at five years ( p = 0.038 ) . The ten-year survival rate was 94 % ( 95 % confidence interval 90.1 to 98.0 ) . A total of 14 UKRs ( 3.5 % ) required revision . The most common reason for revision was dislocation of the bearing in 12 ( 3 % ) . Conversion to a total knee replacement was required in two patients who developed osteoarthritis of the lateral compartment . This is the largest published series of UKR in Korean patients . It shows that the mid-term results after a minimally invasive Oxford phase 3 UKR can yield satisfactory clinical and functional results in this group of patients
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 .