Selthofer Robert, Nikolić Vasilije, Mrcela Tomislav, Radić Radivoje, Leksan Igor, Dinjar Kristijan, Selthofer-Relatić Kristina
Department of Anatomy, School of Medicine, J. J. Strossmayer Osijek University, Osijek, Croatia.
Coll Antropol. 2010 Sep;34(3):1057-61.
Mineral density of the sternum is insufficiently known. The aim of this research was to investigate mineralisation of the sternum and collect normative data on mineral density of the standard male and female sternum in elderly people (average age of female samples was 64 and male's was 62 years). The research was conducted on 93 cadaveric sternums, 56 male and 37 female samples. To determine regional mineral density of the sternum each sample was cut into six bony segments (Figure 1). Mineral density of every segment was determined using the method of ashing. Male sternums were on average denser than female ones in all segments. Average mineral density of the manubrium in women was 0.169 g/cm3 and 0.220 g/cm3 in men. Average mineral density of the body of the sternum also showed existence of sex difference; it was 0.160 g/cm3 in women and 0.227 g/cm3 in men. Both male and female sternums showed identical mineral density distribution. Mineral density of the manubrium and the body was roughly equal, while the analysis of longitudinal segments showed that the central part of both the manubrium and the body of the sternum was denser than lateral parts. Complex determination of the real mineral density for defined segments of the sternum and analysis of the obtained results were used to create the map of mineral density of the sternum in men and women (Figure 2). Maximum density values were four times greater than minimum density values for analysed samples. These data showed that osteoporosis also occurs on the sternum. Loss of structure and lower mineral density decrease the sternum quality and increase the risk of sternal dehiscence after median sternotomy.
胸骨的矿物质密度尚未得到充分了解。本研究的目的是调查胸骨的矿化情况，并收集老年人标准男性和女性胸骨矿物质密度的规范数据（女性样本的平均年龄为64岁，男性为62岁）。该研究对93具尸体胸骨进行了分析，其中男性样本56个，女性样本37个。为了确定胸骨各区域的矿物质密度，每个样本被切成六个骨段（图1）。使用灰化法测定每个骨段的矿物质密度。在所有骨段中，男性胸骨的平均密度均高于女性。女性胸骨柄的平均矿物质密度为0.169g/cm³，男性为0.220g/cm³。胸骨体的平均矿物质密度也存在性别差异；女性为0.160g/cm³，男性为0.227g/cm³。男性和女性胸骨的矿物质密度分布相同。胸骨柄和胸骨体的矿物质密度大致相等，而纵向骨段分析表明，胸骨柄和胸骨体的中央部分比外侧部分密度更高。通过对胸骨特定骨段实际矿物质密度的综合测定以及对所得结果的分析，绘制了男性和女性胸骨矿物质密度图（图2）。分析样本的最大密度值是最小密度值的四倍。这些数据表明胸骨也会发生骨质疏松。结构丧失和较低的矿物质密度会降低胸骨质量，并增加正中开胸术后胸骨裂开的风险。
