Retrospective Study on Ectopic Eruption of First Permanent Molars of School-age Children in Qingdao

doi:10.13701/j.cnki.kqyxyj.2023.10.009

Abstract

Abstract: Objective: To learn the incidence, distribution, and severity of ectopic eruption of first permanent molars of school-age children in Qingdao by panoramic radiographs. Methods: The panoramic radiographs of school-age children from 5-8 year-old were selected. These children came to the Pediatric Stomatology Department of Qingdao Stomatological Hospital from August 1, 2020 to December 10, 2022. The age and gender of the subjects and the tooth number, tooth location, and severity of ectopic eruption of the first permanent molar were counted by SPSS 24.0 software. Results: In 8939 cases, 295 cases (3.31%) were diagnosed as ectopic eruption of the first permanent molar. The prevalence of males (164 cases, 3.4%) was higher than that of female (131 cases, 3.2%). The incidence of maxilla (84.4%) was significantly higher than that of mandible (15.6%, P<0.001). The incidence of the left (47.7%) was similar to that of the right (52.3%, P>0.001). Bilateral (63.1%) ectopic eruption of the first permanent molar was more common than unilateral (36.9%). Severe and very severe ectopic eruptions were more common in the maxilla than in the mandible (P<0.001). Conclusion: The incidence of ectopic eruption of the first permanent molar was slightly higher in males than in females. The ectopic eruption of the first permanent molars is more common in the maxilla than in the mandible, and the incidence is roughly the same in the left and right maxilla. Bilateral first permanent molar eruption is more common than unilateral eruption.

Key words: first permanent molar, ectopic eruption, panoramic radiographs, severity

ZHANG Qian, WANG Wenru, ZHAO Xia. Retrospective Study on Ectopic Eruption of First Permanent Molars of School-age Children in Qingdao[J]. Journal of Oral Science Research, 2023, 39(10): 898-902.

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