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 .
Factors contributing to inherent varus alignment of lower limb in normal Asian adults: role of tibial plateau inclination.
PURPOSE This prospect i ve study aim ed to evaluate radiographically , mechanical or hip-knee-ankle ( HKA ) axis in healthy , asymptomatic , Asian ( Indian and Korean ) adults between 20 and 40 years of age to determine the incidence of inherent varus ( mechanical limb alignment of > 3 ° varus ) and the factors influencing it . METHODS Three hundred and eighty-eight lower limbs were evaluated using full length , st and ing hip-to-ankle radiographs in 198 healthy , asymptomatic , Asian ( Indian and Korean ) adults between 20 and 40 years of age to assess the  hip-knee-ankle ( HKA ) angle , medial proximal tibial angle ( MPTA ) , femoral bowing and femoral neck-shaft angle  to determine the incidence of inherent varus ( mechanical limb alignment of > 3 ° varus ) and the factors influencing it . RESULTS Overall , the mean HKA angle was 177.6 ° ±2.6 ° with 34.5 % of limbs in inherent varus ( mean HKA angle 174.9 ° ±1.8 ° ) . The incidence of inherent varus was significantly higher ( p=0.01 ) in males ( 40 % ) compared to females ( 28 % ) but similar among Indian ( 34 % ) and Korean subjects ( 35 % ) . The hip-knee-ankle ( HKA ) angle showed significant positive correlation ( r=0.82 , p<0.001 ) with only the medial proximal tibial angle ( MPTA ) . CONCLUSIONS Inherent varus alignment of the lower limb is fairly common among asymptomatic , Asian adults . These results raise several pertinent questions regarding the role of inherent varus in the aetiopathogenesis of knee osteoarthritis and in lower limb realignment procedures
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 .