Micromorphological Analysis of Primary Second Molar withMolar-incisor Malformation : A Case Report

Author: Myunghwan KIM ¹ ; Howon PARK ; Juhyun LEE ; Hyunwoo SEO
Author Information

1. Department of Pediatric Dentistry, Oral Science Research Center, College of Dentistry, Gangneung-Wonju National University
Publication Type:3
From: Journal of Korean Academy of Pediatric Dentistry 2021;48(3):352-358
CountryRepublic of Korea
Language:Korean
Abstract: Molar-incisor malformation (MIM) is characterized by malformation in the root with a normal crown. While MIM mostly occurs in the permanent first molar, it has also been reported in the maxillary central incisor and the primary second molar (PSM), but anatomical analysis of the primary teeth with MIM has not been studied to date.
In this case report, a patient with MIM was reported, and an extracted PSM with MIM was analyzed with micro computed tomography (CT).
A cervical constriction morphology of the cementoenamel junction (CEJ) can be observed in extracted PSM. In micro CT analysis, characteristics such a mineralized plate (cervical mineralized diaphragm) in the CEJ area, complex root canal morphologies, a calcified mass inside the pulp chamber, and constricted pulp chamber of crown portion were observed.