摘要目的:基于CT三维重建数据绘制老年人骨盆骨折地图，探讨老年人骨盆骨折的特点，为进一步临床研究提供参考。方法:回顾性分析2017年1月至2021年12月期间解放军总医院第七医学中心骨科收治的79例老年骨盆骨折患者资料。男24例，女55例，年龄为60~98岁（平均74.3岁）。将所有患者骨盆CT扫描数据导入Mimics Medical 18.0、Geomagic Studio 2014、Rhinoceros 6.0和Matlab软件，建立老年骨盆骨折三维模型，将骨折碎片导入标准骨盆模板，拟合后提取骨折线形态，将所有患者骨折线拟合至同一骨盆模板，形成骨折线分布频率图，并创建骨折热图。结果:79例老年骨盆骨折患者中，前、后环同时骨折69例[87.3%（69/79）]。老年骨盆骨折的骨折地图和热图结果显示：前环骨折线集中分布在上、下耻骨支皮质骨与松质骨移行交界处，后环骨折线集中分布在髂骨中后1/3和骶骨翼；各部位骨折频率由高到低依次为耻骨、骶骨和髂骨。结论:骨折地图技术可直观呈现老年人骨盆骨折的骨折线分布特点，老年人骨盆骨折的常见骨折类型为前、后环同时骨折，骨折的好发部位为上、下耻骨支松质骨与皮质骨交界处和骶髂关节周围。

abstractsObjective:To characterize the geriatric osteoporotic pelvic fractures using 3-D computed tomography (CT) fracture mapping.Methods:Retrospectively analyzed were the 79 elderly patients with pelvic fracture who had been admitted to Department of Orthopaedics, The 7th Medical Center of PLA General Hospital between January 2017 and December 2021. There were 24 men and 55 women, aged from 60 to 98 years (average, 74.3 years). The CT scan data of the pelvis from all patients were imported into the software (Mimics Medical 18.0, Geomagic Studio 2014, Rhinoceros 6.0, and Matlab) to create a 3-D pelvic fracture model. The fracture pieces were imported into a standard pelvic template to obtain the morphology of the fracture lines after fitting. A map of fracture line distribution frequency and a fracture heat map were created by fitting the fracture lines of all patients into a common pelvic template.Results:Of the 79 elderly patients with pelvic fracture, 69 (87.3%) had fractures of both the anterior and the posterior rings. The fracture map and heat map of geriatric pelvic fractures showed the following: the fracture lines of the anterior ring were concentrated in the junction of the cancellous bone and cortical bone of the superior and inferior pubic rami; the fracture lines of the posterior ring were concentrated in the middle and posterior 1/3 of the ilium and in the sacral wing; the fracture frequencies incurred by the pubic bone, sacrum, and ilium were from the highest to the lowest.Conclusions:Fracture mapping can visually characterize the distribution of fracture lines of the geriatric pelvic fractures. Simultaneous fractures of the anterior and posterior rings of the pelvis are the most typical kind of pelvic fractures in the elderly. The junction of the cancellous and cortical bones of the superior and inferior pubic rami and the area surrounding the sacroiliac joint are the most frequent locations for the fractures.