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 .
Ten- to 15-year results of the Oxford Phase III mobile unicompartmental knee arthroplasty
Aims The interest in unicompartmental knee arthroplasty ( UKA ) for medial osteoarthritis has increased rapidly but the long-term follow-up of the Oxford UKAs has yet to be analysed in non- design er centres . We have examined our ten- to 15-year clinical and radiological follow-up data for the Oxford Phase III UKAs . Patients and Methods Between January 1999 and January 2005 a total of 138 consecutive Oxford Phase III arthroplasties were performed by a single surgeon in 129 patients for medial compartment osteoarthritis ( 71 right and 67 left knees , mean age 72.0 years ( 47 to 91 ) , mean body mass index 28.2 ( 20.7 to 52.2 ) ) . Both clinical data and radiographs were prospect ively recorded and obtained at intervals . Of the 129 patients , 32 patients ( 32 knees ) died , ten patients ( 12 knees ) were not able to take part in the final clinical and radiological assessment due to physical and mental conditions , but via telephone interview it was confirmed that none of these ten patients ( 12 knees ) had a revision of the knee arthroplasty . One patient ( two knees ) was lost to follow-up . Results The mean follow-up was 11.7 years ( 10 to 15 ) . A total of 11 knees ( 8 % ) were revised . The survival at 15 years with revision for any reason as the endpoint was 90.6 % ( 95 % confidence interval ( CI ) 85.2 to 96.0 ) and revision related to the prosthesis was 99.3 % ( 95 % CI 97.9 to 100 ) . The mean total Knee Society Score was 47 ( 0 to 80 ) pre-operatively and 81 ( 30 to 100 ) at latest follow-up . The mean Oxford Knee Score was 19 ( 12 to 40 ) pre-operatively and 42 ( 28 to 55 ) at final follow-up . Radiolucency beneath the tibial component occurred in 22 of 81 prostheses ( 27.2 % ) without evidence of loosening . Conclusion This study supports the use of UKA in medial compartment osteoarthritis with excellent long-term functional and radiological outcomes with an excellent 15-year survival rate . Cite this article : Bone Joint J 2016;98-B(10 Suppl B):41–7
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 .