Novel ultrasonic bone densitometry based on two longitudinal waves: significant correlation with pQCT measurement values and age-related changes in trabecular bone density, cortical thickness, and elastic modulus of trabecular bone in a normal Japanese population
Tóm tắt
A reference database for trabecular bone density, cortical thickness, and elastic modulus of trabecular bone for a novel ultrasonic bone densitometry system (LD-100) based on two longitudinal waves (fast and slow) was determined over a wide age range in a normal Japanese population. A novel ultrasonic bone densitometry system (LD-100 system) was applied to create a reference database for trabecular bone density (TBD), cortical thickness (CoTh), and elastic modulus of trabecular bone (EMTb) for this device over a wide age range in a normal Japanese population. In a comparative study between LD-100 and peripheral quantitative computed tomography (pQCT) systems, 52 individuals were examined by both systems at the same radius simultaneously. To create a reference database, a total of 2,380 healthy subjects (1,179 men, 1,201 women), ages 18–99 years, were examined using the LD-100 system. Highly significant correlations between the LD-100 and pQCT systems were found in TBD (r = 0.877, p < 0.001) and CoTh (r = 0.723, p < 0.001). For the reference database, peak values of TBD, CoTh, and EMTb were observed at 30–34 years (255.09 mg/cm3), 20–24 years (5.23 mm), and 20–24 years (4.09 GPa) in men, and at 25–29 years (209.24 mg/cm3), 25–29 years (3.98 mm), and 20–24 years (3.33 GPa) in women, respectively. The TBD fell significantly (p < 0.05) beginning at 55–59 years in both sexes, with a relatively rapid decrease in women. The CoTh showed a significant decrease beginning at 40–44 years in men and 50–54 years in women. The EMTb showed a significant decrease beginning at 40–44 years in men and 55–59 years in women. The LD-100 system is a useful bone densitometry device and the database of age-related changes in TBD, CoTh, and EMTb established in this study will provide fundamental data for future studies related to bone status.
Tài liệu tham khảo
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