Clinical Features of Molar Root-Incisor Malformation: A Retrospective Study
10.5933/JKAPD.2024.51.3.279
- Author:
Sejin CHUN
1
;
Hyuntae KIM
;
Ji-Soo SONG
;
Teo Jeon SHIN
;
Hong-Keun HYUN
;
Jung-Wook KIM
;
Ki-Taeg JANG
;
Young-Jae KIM
Author Information
1. Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
- Publication Type:Original Article
- From:
Journal of Korean Academy of Pediatric Dentistry
2024;51(3):279-289
- CountryRepublic of Korea
- Language:English
-
Abstract:
This study aimed to identify the clinical characteristics of molar root-incisor malformation (MRIM) and provide clinical considerations for treatments. Panoramic radiographs and electronic medical records of 64 patients with MRIM were retrospectively reviewed. Age, gender, follow-up period, medical history, complications, distribution of MRIM teeth, treatment, and prognosis were analyzed. Females were affected 1.56 times more than males, and the average age was 8.2 years. Dental complications, including periapical lesions, abscesses, and alveolar bone loss, were observed in 71.9%, and eruption disturbance of adjacent teeth was noticed in 37.5%. Most patients had medical histories in the first year of life. The most prevalent history was prematurity or low birthweight, followed by neurological conditions, surgeries, medications, and infections. All patients had MRIM on permanent first molars. The primary second molars were the second most frequently involved, followed by maxillary permanent central incisors and primary first molars. The prevalence was low on permanent lateral incisors and canines. Extraction was the most prevalent treatment done on MRIM-affected teeth, and most extraction sockets were managed by the eruption of permanent second molars. Few cases received endodontic treatment but with low success rates. Early detection of MRIM and prompt, appropriate treatment are important to avoid unnecessary discomfort from complications.
