Secondary fracture risk assessment: Bone mineral density and bone metabolism of elderly women within 6-12 months after hip fractures

doi:10.3969/j.issn.2095-4344.2013.50.003

Abstract

Abstract:

BACKGROUND: Prospective studies concerning bone metabolism and bone mineral density variation after fractures have been reported from the 1960s, but these studies are mainly focused on tibia and fibula and ankle fractures in patients with low sample size.
OBJECTIVE: To observe the changes in bone mineral density and bone metabolism indexes in elderly women within 6 to 12 months after hip fractures, and to analyze the correlation.
METHODS: We selected 48 elderly women with hip fractures admitted in the Department of Orthopedics, Beijing Aerospace General Hospital in China from May 2011 to July 2013. Standards for follow-up were developed to measure the bone mineral density and bone metabolism indexes in the L1-4 spinal segments and both sides of the hip. The bone metabolism indexes included bone alkaline phosphatase, osteocalcin, cross-linked C-terminal peptide of collagen I, and serum tartrate-resistant acid phosphatase 5b levels. Multiple linear regression analysis was performed based on measurements of bone mineral density and bone metabolism indexes after fracture healing.
RESULTS AND CONCLUSION: After fracture healing, bone mineral density of the fractured hip and lumbar vertebra was significantly lower than the baseline value. There was no statistical difference in bone mineral density between the healthy hip and the baseline value. At 6 months after fractures, bone alkaline phosphatase, osteocalcin, cross-linked C-terminal peptide of collagen I, and serum tartrate-resistant acid phosphatase 5b levels were significantly higher than the baseline values. At 12 months after fractures, osteocalcin level was significantly higher than the baseline value, while other indexes of bone metabolism measurements showed no statistical difference from the baseline values. When healing of hip fractures met the clinical and radiographic standards, the partial regression coefficient of delta-Z score reached peak in the changes of serum osteocalcin and bone mineral density of the fractured hip. Under clinical healing of fractures, serum osteocalcin level exhibits a higher value for the assessment of recovery speed of bone mineral density. Monitoring corresponding bone metabolism indexes after fracture healing can improve the accuracy of judging bone mineral density changes to reduce the risk of secondary fractures.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

全文链接：

Key words: hip fractures, bone density, alkaline phosphatase, fracture healing, osteoporosis

CLC Number:

R318

Zhang Zi-jun, Zhao Wen, Zhao Xi, Peng Hai-zhou . Secondary fracture risk assessment: Bone mineral density and bone metabolism of elderly women within 6-12 months after hip fractures[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2013.50.003.

Figures/Tables 3

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