Key result
Near-normal Oxford UKA component alignment is linked to higher 1-year patient acceptable symptom state achievement.
Why the study?
Do preoperative and postoperative alignment changes and implant placement angles affect 1-year clinical outcomes (KOOS PASS) in patients undergoing Oxford UKA?
Observational (n=23)
No
Do preoperative and postoperative alignment changes and implant placement angles affect 1-year clinical outcomes (KOOS PASS) in patients undergoing Oxford UKA?
In Oxford UKA, placing the tibial and femoral implants close to normal alignment (e.g., 3 degrees varus for tibia, perpendicular to tibia for femur) may improve 1-year patient-reported clinical outcomes.
Closer-to-neutral alignment may improve 1-year PASS after Oxford UKA; observational association leaves open need for randomized confirmation before practice change.
要旨：【目的】Oxford UKAの術前後アライメント変化，インプラント設置角度により，臨床成績に影響がある因子を調査すること【対象・方法】2023年4月1日から2024年7月31日までにOxford UKAを施行し1年以上経過した計23膝を対象とした．術前，術後アライメント変化として，%MA，HKA，MPTA，LDFA，関節適合性として，TFS，CTFS，インプラント設置角度として，TCIA，FCIAを計測して，臨床成績として術後1年後のKOOS（symptom，pain，ADL，QOL）の4項目のpatient acceptable symptom state（PASS）達成群と非達成群に対して統計解析を行った．【結果・考察】symptomでは術後LDFA，ΔTFS，ΔLDFA，painではΔLDFA，術後LDFA，ADLではΔLDFA，TCIA，QOLではFCIAが関与している可能性を示した．脛骨，大腿骨ともに，標準的なアライメントに近い角度に設置したほうが，臨床成績がいい可能性があった．
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Sasaki et al. (2026) conducted an observational in Knee osteoarthritis (n=23). Oxford unicompartmental knee arthroplasty (UKA) was evaluated on Achievement of Patient Acceptable Symptom State (PASS) for KOOS subscales (symptom, pain, ADL, QOL) at 1 year postoperatively. In patients undergoing Oxford unicompartmental knee arthroplasty, placing the tibial and femoral components closer to normal alignment angles (such as tibial component at 3 degrees varus) was associated with higher achievement of Patient Acceptable Symptom State at 1 year.
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