Department of Orthopedics, People’s Hospital of Shenxian, Shenxian, Shandong Province, China Department of Joint Surgery, Liaocheng Clinical School Affiliated to Taishan Medical University, Liaocheng, Shandong Province, China
BACKGROUND: Bone loss to different degrees may appear within 1 year after hip replacement in the femoral or acetabular sides, and severely affect long-term stability of the prosthesis and bone strength. Thus, to reduce bone loss around the prosthesis stem after total hip replacement is significant to prolong the use time of the prosthesis and to prevent fractures surrounding the prosthesis. OBJECTIVE: To observe the preventive effect of zoledronic acid on bone loss surrounding the prosthesis ste...更多
BACKGROUND: Bone loss to different degrees may appear within 1 year after hip replacement in the femoral or acetabular sides, and severely affect long-term stability of the prosthesis and bone strength. Thus, to reduce bone loss around the prosthesis stem after total hip replacement is significant to prolong the use time of the prosthesis and to prevent fractures surrounding the prosthesis. OBJECTIVE: To observe the preventive effect of zoledronic acid on bone loss surrounding the prosthesis stem after hip replacement. METHODS: A total of 80 patients after total hip replacement in the People’s Hospital of Shenxian from February 2011 to September 2014 were enrolled in this study. They were divided into two groups . At 4 days after replacement, patients in the observation group received treatment with zoledronic acid, but those in the control group did not give zoledronic acid. The rest medication was identical between the two groups. Bone mineral density in the hip was measured before replacement and at 1 year after replacement in both groups. Serum calcium and phosphorus levels and alkaline phosphatase activities were observed before replacement, 3 days and 1 year after medication in the two groups. Adverse reaction during medication was recorded in the observation group. RESULTS AND CONCLUSION: The average bone mineral density was significantly decreased in both groups at 1 year after replacement, and significant differences were found as compared with before replacement . Alkaline phosphatase activities were low in the observation group at 1 year after medication, and significant difference was detected as compared with the control group and that before replacement . Within two or three days after medication, nine patients suffered from varying degrees of muscle aches and fever in the observation group, and above symptoms were lessened after taking acetaminophen. These results verify that after total hip replacement, zoledronic acid injection can effectively prevent bone loss around the prosthesis in early stage after replacement, but fever symptoms may occur within a week after replacement. Thus, it is recommended that zoledronic acid injection can be given at 1 week after replacement. If fever and other symptoms appear, acetaminophen can be given.收起
