Farias Gomes Amanda, Moreira Debora Duarte, Zanon Mariana Fabbro, Groppo Francisco Carlos, Haiter-Neto Francisco, Freitas Deborah Queiroz
Department of Oral Diagnosis - Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil.
Department of Oral Diagnosis - Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil.
Leg Med (Tokyo). 2020 Nov;47:101743. doi: 10.1016/j.legalmed.2020.101743. Epub 2020 Jul 3.
The aim in this study was to evaluate the influence of skeletal class, facial type, and sex on soft tissue thickness (STT) of the craniofacial midline in a Brazilian subpopulation. Thus, 121 cone beam computed tomography (CBCT) scans (54 males and 67 females, age 21 to 40 yrs) composed the study sample. Patients were classified according to skeletal class (class I, II, and III) and facial type (brachycephalic, mesocephalic, and dolichocephalic), and STT was measured (mm) in 10 landmarks in the craniofacial midline for each CBCT scan. Multivariate analysis of covariance evaluated facial STT with regard to multiple independent variables (sex, age - covariate, facial type, and skeletal class). TEM and rTEM assessed the intra-examiner agreement. STT was significantly greater in males than in females for all regions measured (p < 0.05), except for the pogonion-pogonion' landmark (p>0.05). In general, class III individuals had significantly thicker soft tissue in the maxilla - subspinale-subnasale', prosthion-labrale superius', and incision-stomion' regions, while class II subjects had thicker soft tissue in the infradentale-labrale inferius' mandibular landmark (p < 0.05). Regarding facial type, dolichocephalic individuals showed significantly thicker soft tissue in the supramentale-supramentale' mandibular landmark, whereas brachycephalic subjects had thicker soft tissue in maxillary regions - prosthion-labrale superius' and incision-stomion' (p < 0.05). rTEM values were below 5% for most landmarks, and all TEM values were below 1 mm. Skeletal class and facial type influence STT, showing a soft tissue compensation, with deeper soft tissue in areas with lower skeletal development, and/or where bone is positioned more posteriorly.
本研究的目的是评估骨骼类型、面部类型和性别对巴西亚人群颅面中线软组织厚度（STT）的影响。因此，研究样本包括121例锥束计算机断层扫描（CBCT）（54例男性和67例女性，年龄21至40岁）。患者根据骨骼类型（I类、II类和III类）和面部类型（短头型、中头型和长头型）进行分类，并且对每次CBCT扫描在颅面中线的10个标志点测量STT（毫米）。多变量协方差分析评估了与多个独立变量（性别、年龄协变量、面部类型和骨骼类型）相关的面部STT。TEM和rTEM评估了检查者内部的一致性。在所有测量区域中，除了颏前点-颏前点标志点（p>0.05）外，男性的STT显著大于女性（p<0.05）。一般来说，III类个体在上颌-前鼻棘-鼻下点、前鼻棘-上唇缘、切牙-口裂区域的软组织明显更厚，而II类个体在下颌-下齿槽缘点-下唇缘标志点的软组织更厚（p<0.05）。关于面部类型，长头型个体在下颌-颏下点-颏下点标志点的软组织明显更厚，而短头型个体在上颌区域-前鼻棘-上唇缘和切牙-口裂的软组织更厚（p<0.05）。大多数标志点的rTEM值低于5%，所有TEM值均低于1毫米。骨骼类型和面部类型影响STT，表现出软组织代偿，在骨骼发育较低和/或骨骼位置更靠后的区域软组织更深。
