The objective of the present study was to compare assessments of the mandibular bone as fracture risk indicators for 277 men and women. The mandibular trabecular bone was evaluated in periapical radiographs, using a visual index, as dense, mixed dense and sparse, or sparse. Bone texture was analysed using a computer-based method in which the number of transitions from trabeculae to intertrabecular spaces was calculated. The sum of the sizes and intensities of the spaces between the trabeculae was calculated using Jaw-X software. Women had a statistically significantly greater number of fractures and a higher frequency of sparse mandibular bone. The OR for having suffered a fracture with visually sparse trabecular bone was highest for the male group (OR = 5.55) and lowest for the female group (OR = 3.35). For bone texture as an indicator of previous fracture, the OR was significant for the female group (OR = 2.61) but not for the male group, whereas the Jaw-X calculations did not differentiate between fractured and non-fractured groups. In conclusion, all bone-quality assessments showed that women had a higher incidence of sparse trabecular bone than did men. Only the methods of visual assessment and trabecular texture were significantly correlated with previous bone fractures.

译文

本研究的目的是比较下颌骨作为277男性和女性骨折风险指标的评估。在根尖周x线片中评估下颌小梁骨,使用视觉指数为致密,混合致密和稀疏或稀疏。使用基于计算机的方法分析了骨骼纹理,其中计算了从小梁到小梁间空间的过渡次数。使用Jaw-X软件计算小梁之间空间的大小和强度之和。女性的骨折数量在统计学上显着增加,下颌骨稀疏的频率更高。患有视觉稀疏骨小梁骨折的OR在男性组中最高 (OR = 5.55),在女性组中最低 (OR = 3.35)。对于骨质地作为先前骨折的指标,OR对女性组 (OR = 2.61) 很重要,但对男性组则不重要,而Jaw-X计算并未区分骨折组和非骨折组。总之,所有骨质量评估表明,女性的稀疏骨小梁发生率高于男性。只有视觉评估和小梁纹理的方法与先前的骨折显着相关。

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