The influence of early weight-bearing exercise to periprosthetic bone mineral density after non-cemented total hip arthroplasty

Abstract

Objective To explore effects to periprosthetic bone density by early weight-bearing exercise for patients after non-cemented total hip replacement. Methods Between December 2009 and October 2010, 46 patients with hip osteoarthrities treated by non-cemented total hip replacement were randomly divivided into early weight-beating exeerse group and non-early weight-beating excerse group after operation. All patients were followed up average 14 monthes and scored of evaluation according to Harris score criteria. Periprosthetic bone density evaluation were performed on all patients at 1week, 3 month, 6 month and 12 month postoperatively.Results There was no statistics singnificence of Harris score beteween the two groups, and perithetic femoral bone density of every patient was decreased singnifieently at 3,6 month postoperatively. The proximal femoral bone density of patients in early weight-bearing exercise group were more higher than those of patients in nonearly weight-bearing exercise group, but there no statistic significence between the two groups at 12 months postoperatively. Conclusions Early weight-bearing exercise after total hip replacement can prohibit periprosthetic bone lose, and improve live qulity of postoperative rehabilitation. Key words: hip joint; total hip replacement; weigth-bearing; exercise; bone density