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KMID : 0358920220490010025
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Journal of the Korean Academy of Pedodontics
2022 Volume.49 No. 1 p.25 ~ p.34
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Analysis of the Characteristics of Maxillary Supernumerary Lateral Incisor
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Nah Jeung-Seon
Lee Ko-Eun
Kim Mi-Sun
Nam Ok-Hyung
Choi Sung-Chul
Lee Hyo-Seol
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Abstract
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This study aimed to investigate a quantitative analysis of the anatomical characteristics of the maxillary supernumerary lateral incisor and its relationship with lateral incisors. Forty-four supernumerary lateral incisors from 43 patients were evaluated for analyzing the position, shape, direction, and relationship between the supernumerary lateral incisor and the normal lateral incisors, using cone-beam computed tomography (CBCT). To compare the size of crown, the mesiodistal width was measured and the Nolla stage was used for evaluating the degree of root development to compare tooth maturity. The supernumerary lateral incisors were in the normal direction at a rate of 90.9%, and in a supplemental shape at a rate of 84.1%. The supernumerary lateral incisor was smaller in size compared to the adjacent lateral incisor and opposite lateral incisor (p < .0001). There was no statistically significant difference in the development stage of root.
Based on these results, the supernumerary lateral incisor is similar with the lateral incisor, but has a difference in the size of crown. It is necessary to distinguish the supernumerary lateral incisor from the lateral incisor precisely to reduce clinical complications.
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KEYWORD
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Supernumerary lateral incisor, CBCT, Supplemental tooth, Crown width, Nolla stage, Retrospective study
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