Faculty of Science, School of Human Sciences, The University of Western Australia.
School of Dentistry, The University of Queensland.
J Oral Sci. 2021 Jun 29;63(3):247-251. doi: 10.2334/josnusd.20-0596. Epub 2021 May 19.
Many studies of tooth dimensions have reported both diversity among populations and sexual dimorphism. This study aimed to collect data on mesiodistal dimensions and sexual dimorphism of permanent teeth of contemporary Western Australian adolescents.
The mesiodistal dimensions of teeth from 500 adolescents (177 males, 323 females; age, 13-18 years) were obtained from pre-orthodontic treatment digital dental records of examinations using Invisalign technology. Differences between contralateral teeth and sexual dimorphism were analyzed by using SPSS.
Mesiodistal dimensions significantly differed between right and left teeth in both sexes. Males had larger teeth than females, and the difference was significant for most teeth. Reverse dimorphism (females had slightly larger teeth than males) was observed for the maxillary second premolar. Mandibular canines exhibited the greatest dimorphism. In addition, secular trends-specifically, a reduction in the degree of dimorphism-were observed in mesiodistal dimensions.
Mesiodistal dimensions significantly differed between teeth in contralateral quadrants, in both arches. Most teeth exhibited sexual dimorphism, which was the greatest for permanent mandibular canines. Dimorphism was less obvious in this population than in other populations.
许多关于牙齿尺寸的研究报告称，人群之间存在多样性和性别二态性。本研究旨在收集当代西澳大利亚青少年恒牙的近远中尺寸和性别二态性数据。
使用 Invisalign 技术对 500 名青少年（男性 177 名，女性 323 名；年龄 13-18 岁）的正畸前治疗数字牙列记录中的牙齿近远中尺寸进行了测量。使用 SPSS 分析了双侧牙齿之间的差异和性别二态性。
男女两性的牙齿近远中尺寸在两侧均存在显著差异。男性的牙齿大于女性，大多数牙齿的差异显著。上颌第二前磨牙出现了相反的二态性（女性的牙齿比男性略大）。下颌尖牙的二态性最大。此外，还观察到近远中尺寸的年代趋势，具体表现为二态性程度降低。
双侧象限的牙齿近远中尺寸存在显著差异，在两个牙弓中都是如此。大多数牙齿存在性别二态性，其中下颌恒尖牙的性别二态性最大。与其他人群相比，该人群的二态性不太明显。
