Nyström M, Könönen M, Alaluusua S, Evälahti M, Vartiovaara J
Department of Pedodontics and Orthodontics, University of Helsinki, Finland.
J Dent Res. 1990 Nov;69(11):1765-70. doi: 10.1177/00220345900690111101.
Sizes of horizontal wear facets of maxillary anterior teeth were studied longitudinally from the primary dentition at age five to the young adult dentition at the age of 18 years. By a planimetric method, we calculated the wear areas on dental casts taken at the ages of five, ten, 14, and 18 years from the dentition of 39 healthy, orthodontically untreated subjects with good morphological occlusion. For young adults, we also studied the association between the amount of wear and reported parafunctions, maximal bite force, salivary buffer capacity, salivary flow rate, and some cephalometric variables. Size of wear facets on all anterior teeth increased with age. Significant correlations were found between the total wear areas of the six anterior primary teeth at five years of age and those of their permanent successors at age 14 (r = 0.44) and 18 (r = 0.39). For an individual, tooth wear at five years of age was, however, of low predictive value for tooth wear in young adulthood, whereas tooth wear at 14 years of age predicted it well (r = 0.89). Highest correlations between tooth wear and background factors at 18 years of age were found for maximal anterior bite force (r = 0.44) and for the size of the gonial angle (r = -0.31). Wear of anterior teeth was not associated with reported parafunctions in young adulthood.
从5岁的乳牙列到18岁的年轻恒牙列，对上颌前牙水平磨耗面的大小进行了纵向研究。通过平面测量法，我们计算了39名健康、未经正畸治疗且咬合形态良好的受试者在5岁、10岁、14岁和18岁时所取牙模上的磨损面积。对于年轻成年人，我们还研究了磨损量与报告的副功能、最大咬合力、唾液缓冲能力、唾液流速以及一些头影测量变量之间的关系。所有前牙磨耗面的大小随年龄增加。发现5岁时6颗乳前牙的总磨损面积与其14岁（r = 0.44）和18岁（r = 0.39）的恒牙继承牙的总磨损面积之间存在显著相关性。然而，对于个体而言，5岁时的牙齿磨损对年轻成年期的牙齿磨损预测价值较低，而14岁时的牙齿磨损预测效果良好（r = 0.89）。在18岁时，牙齿磨损与背景因素之间的最高相关性出现在最大前牙咬合力（r = 0.44）和下颌角大小（r = -0.31）方面。年轻成年期前牙的磨损与报告的副功能无关。
