Second Dental Clinic, Department of Oral Implantology, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center for Oral Disease, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, China.
Faculty of Dentistry, Oral and Maxillofacial Radiology, Applied Oral Sciences, The University of Hong Kong, Hong Kong, China.
Clin Implant Dent Relat Res. 2019 Apr;21(2):310-316. doi: 10.1111/cid.12731. Epub 2019 Feb 21.
Abnormalities of some facial bones derived from the ectomesenchyme have been found in ectodermal dysplasia (ED) patients, but the characteristics of the zygoma are unknown.
Comparison between ED patients and normal individuals to understand the anatomical features of the zygoma in ED patients.
Thirty patients diagnosed with ED based on clinical features and/or gene sequence tests and 80 normal individuals were recruited from 2016 to 2018. The thickness of the zygomatic body at 12 points on the superior, middle, and inferior areas and the length of four lines were measured on a three-dimensional cone beam computed tomography image. Differences between ED patients and normal individuals were then compared.
The zygomatic thicknesses and lengths were smaller in ED patients than in normal individuals. For ED patients, the largest thicknesses on the superior, middle, and inferior areas of the zygoma were 8.47 ± 1.49, 7.03 ± 1.56, and 5.99 ± 1.22 mm.
The development of zygomatic thickness on the inferior area and the zygomatic length were insufficient in ED patients with oligodontia. Consequently, zygomatic hypoplasia presented difficulties for the "quad approach" to zygomatic implants in this group of patients.
在外胚层发育不全（ED）患者中发现一些来自中胚层的面骨异常，但颧骨的特征尚不清楚。
比较 ED 患者和正常个体，以了解 ED 患者颧骨的解剖特征。
2016 年至 2018 年间，根据临床特征和/或基因序列测试，共招募了 30 名 ED 患者和 80 名正常个体。在三维锥形束 CT 图像上测量颧骨体上 12 个点的上、中、下区域的厚度和 4 条线的长度。然后比较 ED 患者和正常个体之间的差异。
ED 患者的颧骨厚度和长度均小于正常个体。对于 ED 患者，颧骨上、中、下区域的最大厚度分别为 8.47±1.49、7.03±1.56 和 5.99±1.22mm。
在少牙症的 ED 患者中，颧骨下部和颧骨长度的发育不足。因此，对于该组患者的“四 Approach”颧骨种植体，颧骨发育不良导致植入困难。
