Objective To compare the early clinical efficacy of unicompartmental knee arthroplasty(UKA) and total knee arthroplasty(TKA) for elderly patients with medial compartmental knee osteoarthritis.Methods A total of 35 elderly patients with medial compartmental knee osteoarthritis were selected from September 2014 to March 2018 in our hospital

of whom 16 cases treated by UKA were observation group and 19 cases treated by TKA were control group. Results The operation time

intraoperative blood loss

the rate of perioperative blood transfusion

postoperative drainage volume and hospitalization stays of observation group were less than those of control group

the difference were significant(P<0.05).Before the treatment

there was no significant differences in the KSS score between two groups(P＞0.05).After the treatment

KSS scores of two groups had been improved to some extent

and the observation group was better than the control group

the difference was significant(P<0.05).No revision or infection happened in 1 year postoperative follow-up of either group.The observation group(0) were less than the control group(26.32%) in thrombosis rate

the difference was significantly(P<0.05).Conclusion Both UKA and TKA have certain early clinical efficacy

but UKA had advantages such as shorter operation time

shorter hospitalization，less pain

lower incidence of adverse reaction

which can promote the postoperative function recovery

the early clinical efficacy is more significant.