Study on Morphology of Some Normal Maxillary and Mandibular Dental Arch and Basal Bone Arch in Mixed Dentition Stage ⅢA

doi:10.13701/j.cnki.kqyxyj.2021.06.012

Abstract

Abstract: Objective: To analyze the correlation between the dental arch and basal bone arch of some normal jaw and mandible in mixed dentition stage ⅢA through comparing the 3D digital measurement of dental arch and basal bone morphology. Methods: A total of 92 children (44 males and 48 females) who met the requirements in the Department of Pediatric Dentition Prevention of the First Affiliated Hospital of Xinjiang Medical University were selected. They were made plaster models and measured by 3d digital scanning and measuring software. Pearson correlation analysis was conducted on the morphological parameters of mandibular dental arch and basal bone arch, and the fitting curve was obtained. Results: The distance difference between FA 'point and WALA' point gradually increased from the lacteal cusp area to the molars area. The linear distance between FA point and WALA point gradually decreased from the mandibular central incisor to the mandibular first permanent molar. There was no statistical difference between men and women on the linear distance (P>0.05). There was a significant correlation between the length and width of mandibular dental arch, the anterior segment of basal bone arch, the middle segment, and the posterior segment (P<0.01). The correlation between the width and height of the mandibular dental arch, the middle and posterior segment of the basal bone arch (r=0.842, r=0.882), and the other measurement indexes were all moderately correlated. Conclusion: The morphology of individual normal mandibular arch and basal bone arch in mixed dentition ⅢA stage is closely related, and the normal value of the difference between FA point of individual normal mandibular arch and WALA point of basal bone arch in mixed dentition ⅢA stage is obtained.

Key words: mixed dentition, individual normal occlusion, dental arch, basal bone arch

ZHANG Bei, ZHU Shaojun, SHENG Li, ZHANG Ruihan, WANG Zhiheng, Xayda·AHAT, WANG Mengqi, LIU Yishan. Study on Morphology of Some Normal Maxillary and Mandibular Dental Arch and Basal Bone Arch in Mixed Dentition Stage ⅢA[J]. Journal of Oral Science Research, 2021, 37(6): 533-538.

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