Change of Periprosthetic Bone Mineral Density after Cementless Total Hip Arthroplasty: Using Extensively Porous Coated Femoral Stem.
10.4055/jkoa.2002.37.3.331
- Author:
Kyoung Ho MOON
1
;
Do Seung KWON
;
Suk Myun KO
;
Ryuh Sup KIM
;
Kyu Jung CHO
;
Jung Yoon LEE
Author Information
1. Department of Orthopedic Surgery, Inha University School of Medicine, Incheon, Korea. moon@inha.ac.kr
- Publication Type:Original Article
- Keywords:
Total hip arthroplasty;
Stress shielding;
Bone mineral density
- MeSH:
Arthroplasty;
Arthroplasty, Replacement, Hip*;
Bone Density*;
Bone Remodeling;
Femur;
Humans
- From:The Journal of the Korean Orthopaedic Association
2002;37(3):331-336
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To investigate the annual change of bone mineral density (BMD) around the femoral stem and identified the factors that influence the stress shielding effect in patients who have received extensively porous coated cementless stem. MATERIALS AND METHODS: We reviewed seventy-four patients who were followed up for longer than three years after unilateral primary total hip replacement arthroplasty. The BMD was measured annually using a DEXA QDR 4500(R) on the proximal femur according at the Gruen zone. We analyzed the relationship between the results and the possible variates of periprosthetic bone remodeling. RESULTS: In first year after operation, the BMDs of all Gruen zone decreased significantly. From the second year, the BMDs in Gruen zones 1, 2, and 7 were decreased significantly, but those in Gruen zones 3, 5, and 6 were increased. After three years, the BMD showed no significant change. Among the examined variables including sex, patient's age, stem size, and preoperative Singh's index, stem size and age were found to have strong predictive value. CONCLUSION: Our findings suggest that periprosthetic BMD decreased in all areas over first postsurgical year. From the third year, the BMD stabilized.
