School & Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai 200072, China.
Department of Stomatology, The First Affiliated Hospital of Fujian Medical University, No. 20, Chazhong Rd, Fuzhou 350004, Fujian, China.
Int J Clin Pract. 2023 Jun 5;2023:2485368. doi: 10.1155/2023/2485368. eCollection 2023.
The measurement and analysis of clinical crowns play a crucial role in stomatology, anthropology, and studies of genetic and environmental variables in oral and maxillofacial development.
The objective of the present study was to measure the parameters of clinical crowns of permanent dentition in youth of Han nationality using intraoral scanning and identify potential influencing factors.
A total of 100 subjects (50 males and 50 females) of Han nationality aged 18-24 with normal occlusion were selected. An intraoral scanner was used to obtain the digital dental impressions, and Materialise Magics 21 software was used to measure the mesiodistal diameter (MDD), buccolingual diameter (BLD), height, mesiodistal angle (MDA), and vestibulo-oral angle (VOA) of clinical crowns. The central height was calculated based on the height of clinical crowns. SPSS 27.0 software was used for statistical analysis. The two-independent-sample-test was used to assess discrepancies in clinical crowns between males and females. The paired -test was used to determine differences between antimetric pairs of clinical crowns within the same arch. The repeatability of intraoral scanning was tested using the paired -test between two measurements at one-month intervals. The overall estimated effect was considered significant where < 0.05.
The MDD, BLD, height, MDA, and VOA of clinical crowns in the youth of Han nationality were measured, and the central height was calculated. No significant difference was found in terms of MDA and VOA between genders and antimetric pairs within the same arch. Regarding the distance parameters, the MDD, BLD, and height of clinical crowns in males were significantly larger than those in females (MDD: U1, U3, U7, L2, L3, L6, and L7: < 0.01; BLD: U1: =0.02; U3-U7 and L1-L7: < 0.01; height: U2: =0.03; and U1, U3-U7, and L3-L7: < 0.01). No significant difference was found in clinical crowns between antimetric pairs within the same arch. Intraoral scanning demonstrated good repeatability in the measurement of clinical crowns.
Apart from MDA and VOA, the parameters of clinical crowns in males were significantly larger than in females. Antimetric pairs of clinical crowns within the same arch demonstrated similar tooth dimensions. In future clinical practice and scientific research in the oral and maxillofacial region, a comprehensive design of sexual and ethnic characteristics should be considered.
临床牙冠的测量和分析在口腔医学、人类学以及颌面部发育的遗传和环境变量研究中起着至关重要的作用。
本研究旨在使用口腔内扫描仪测量汉族青年恒牙的临床牙冠参数，并确定潜在的影响因素。
选择 100 名（50 名男性，50 名女性）汉族、年龄在 18-24 岁、正常咬合的受试者。使用口腔内扫描仪获取数字化牙印模，使用 Materialise Magics 21 软件测量临床牙冠的近远中径（MDD）、颊舌径（BLD）、高度、近远中角（MDA）和前庭沟角（VOA）。根据临床牙冠的高度计算中央高度。采用 SPSS 27.0 软件进行统计学分析。采用两独立样本 t 检验比较男性和女性临床牙冠之间的差异。采用配对 t 检验比较同一颌弓中对称牙的差异。采用配对 t 检验评估同一受试者两次测量之间的重复性。当 < 0.05 时，认为总体估计效应具有统计学意义。
测量了汉族青年的临床牙冠的 MDD、BLD、高度、MDA 和 VOA，并计算了中央高度。性别和同一颌弓中对称牙之间的 MDA 和 VOA 无显著差异。在距离参数方面，男性的临床牙冠的 MDD、BLD 和高度明显大于女性（MDD：U1、U3、U7、L2、L3、L6 和 L7： < 0.01；BLD：U1：=0.02；U3-U7 和 L1-L7： < 0.01；高度：U2：=0.03；U1、U3-U7 和 L3-L7： < 0.01）。同一颌弓中对称牙的临床牙冠无显著差异。口腔内扫描在临床牙冠测量中具有良好的可重复性。
除 MDA 和 VOA 外，男性的临床牙冠参数明显大于女性。同一颌弓中对称牙的临床牙冠具有相似的牙体尺寸。在未来的口腔颌面临床实践和科学研究中，应考虑全面的性别和种族特征设计。
