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目的:测量乳牙列个别正常n 儿童在牙尖交错位最大n 力时的咬合接触情况，为乳牙修复、正畸等临床研究提供生理数据基线。n 方法:本研究为横断面研究，在北京大学口腔医学院·口腔医院儿童口腔科开展，于2019年12月至2021年3月共征集57名志愿儿童。按纳入标准最终纳入47名3~5周岁乳牙列个别正常n 儿童，其中男性24名，女性23名。年龄（4.1±0.7）岁（3.0~5.8岁），身高（103.7±7.2） cm （90~120 cm），体质量（17.1±2.5） kg （12.5~22.5 kg）。使用Dental Prescale Ⅱ系统测量牙尖交错位最大n 力时的咬合情况，包括咬合接触面积、平均压强、最大压强、n 力和对称性等。n 结果:47名全乳牙列受试者在牙尖交错位时的最大n 力为（567.40±223.84） N（226.7~1 154.6 N），咬合接触面积为（18.56±6.54） mmn 2（8.4~41.2 mmn 2）。最大n 力与咬合接触面积、身高、体质量均呈显著正相关关系（n r=0.954，n P<0. 01；n r=0.397，n P=0.022；n r=0.453，n P=0.008）。男性儿童的最大n 力［（651.80±224.34） N］、咬合接触面积［（20.77±6.97） mmn 2］均显著大于女性儿童［分别为（479.34±190.45） N、（16.25±5.27） mmn 2］（n P<0.05）。最大压强多为1个点［68%（32/47）］，多位于乳磨牙区。前牙区和后牙区的n 力分别为（124.12±56.99）和（450.11±205.09） N，分别占全牙列的（21.82±11.40）%和（71.80±21.35）%；咬合重心均位于后牙区。乳牙列的前牙区和后牙区均有咬合接触。n 结论:乳牙列个别正常n 在牙尖交错位时最大n 力的个体差异大，最大n 力与性别、身高、体质量和咬合接触面积均显著相关；最大压强集中在乳磨牙区，咬合重心均在后牙区。n “,”Objective:To record occlusal contact of primary dentition at maximal intercuspal position in children with individual normal occlusion.Methods:A total of 57 children were recruited from patients of the Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology. Inclusion criteria were that the subjects were 3-5 years old with no visually detectable caries or pupal and periapical diseases, had complete primary dentition, had individual normal occlusion, had normal function of craniofacial system, were medically healthy, could cooperate with sampling and had obtained written informed consent from the parents or guardians. Finally, forty-seven children aged 3 to 5 years old were enrolled, including 24 males and 23 females. The age, height and weight of all subjects were (4.1±0.7) years old (ranging 3.0-5.8 years old), (103.7±7.2) cm (ranging 90-120 cm) and (17.1±2.5) kg (ranging 12.5-22.5 kg), respectively. Occlusal abilities such as occlusal contact area, average bite pressure, maximum bite pressure, maximum bite force and occlusal balance were measured with Dental Prescale Ⅱ system.Results:Maximum bite force and occlusal contact area at intercuspal position in children with primary dentition were (567.40±223.84) N (ranging 226.7-1 154.6 N) and (18.56±6.54) mmn 2 (ranging 8.4-41.2 mmn 2), respectively. There was a significantly strong correlation between maximum bite force and occlusal contact area (n r=0.954, n P<0.01). Height and weight of children were also positively correlated with their maximum bite force (n r=0.397, n P=0.022 and n r=0.453, n P=0.008, respectively). Maximum occlusal bite force and contact occlusal area of boys [(651.80±224.34) N and (20.77±6.97) mmn 2] were significantly higher and larger than those of girls [(479.34±190.45) N and (16.25±5.27) mmn 2] (n P<0.05). Thirty-two of all 47 children had one occlusal contact point with maximum bite pressure, mostly locating within the primary molar region. Bite forces of anterior and posterior teeth of primary dentition were (124.12±56.99) N and (450.11±205.09) N, respectively, about (21.82±11.40)% and (71.80±21.35)% of maximum bite force of the whole primary dentition. All of the occlusal balance points located in posterior teeth regions. Occlusal contacts were observed at both anterior and posterior teeth of primary dentition with individual normal occlusion.n Conclusions:There was a great variation of maximum bite forces of primary dentitions at intercuspal position of children with individual normal occlusion. Maximum bite force of primary dentition was significantly correlated with occlusal contact area, height and weight of children. Occlusal contact points with maximum bite pressure and occlusal bite balance points of primary dentitions mostly located in primary molar regions.