Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
Department of Orthodontics and Dentofacial Orthopedics, Dental School/Medical Faculty, University of Bern, Bern, Switzerland.
Clin Exp Dent Res. 2022 Aug;8(4):923-930. doi: 10.1002/cre2.577. Epub 2022 Apr 30.
To perform an epidemiological analysis of the antegonial notch depth in postpubertal individuals and to analyze the development of deep antegonial notches longitudinally in growing individuals. MATERIAL AND METHODS: Lateral cephalograms of 302 untreated 17/18-year-old subjects (171 males; 131 females), from the craniofacial growth legacy collection, were analysed to measure antegonial notch depth along the mandibular plane. Sex and sagittal malocclusion were investigated as possible factors influencing notch depth. In subjects with deep antegonial notches (>1.5 standard deviation) at the age of 17/18 years, earlier lateral cephalograms at 7/8 and 13/14 years were obtained, and the magnitude of notch depth analyzed longitudinally. Linear regression analyses were used to assess correlations between antegonial notch depth and other recorded variables.
Antegonial notch depth ranged from 0 to 5.3 mm (mean 2.0 ± 1.0 mm). Antegonial notches were significantly deeper in males (2.3 ± 1.1 mm) than females (1.5 ± 0.7 mm) (p < .001). Notch depth was on average 0.3 mm deeper in Class I than in Class II or III individuals (p = .019). Twenty-one subjects (all male) were judged to have deep antegonial notches at the age of 17/18. In these subjects, notch depth deepened from 13/14 to 17/18 years (p < .001), whereas no change was observed between 7/8 and 13/14 years.
Antegonial notch depth shows important variation in postpubertal individuals, with males having deeper notches than females on average. In those with deep antegonial notches (all males in the present sample), notch depth increases not during prepubertal growth but during the pubertal growth spurt.
对青春期后个体的下颌支后缘切迹深度进行流行病学分析，并分析生长个体中下颌支后缘切迹深度的纵向发育情况。
从颅面生长遗产库中分析了 302 名未经治疗的 17/18 岁受试者（171 名男性；131 名女性）的侧位头颅侧位片，以测量下颌平面上的下颌支后缘切迹深度。性别和矢状面错颌被认为是影响切迹深度的可能因素。在 17/18 岁时存在深下颌支后缘切迹（>1.5 个标准差）的受试者中，获得了更早的 7/8 岁和 13/14 岁的侧位头颅侧位片，并对切迹深度进行了纵向分析。线性回归分析用于评估下颌支后缘切迹深度与其他记录变量之间的相关性。
下颌支后缘切迹深度范围为 0 至 5.3mm（平均值 2.0±1.0mm）。男性（2.3±1.1mm）的下颌支后缘切迹明显比女性（1.5±0.7mm）深（p<0.001）。与 Class II 或 III 个体相比，Class I 个体的切迹深度平均深 0.3mm（p=0.019）。21 名受试者（均为男性）在 17/18 岁时被判定为存在深下颌支后缘切迹。在这些受试者中，切迹深度从 13/14 岁到 17/18 岁加深（p<0.001），而在 7/8 岁到 13/14 岁之间没有观察到变化。
下颌支后缘切迹在青春期后个体中存在重要的变异性，男性平均比女性的切迹更深。在那些存在深下颌支后缘切迹（本样本中均为男性）的个体中，切迹深度不是在青春期生长期间增加，而是在青春期生长突增期间增加。
