Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Clinical Features of Molar Root-Incisor Malformation: A Retrospective Study

  • Sejin Chun (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Hyuntae Kim (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Ji-Soo Song (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Teo Jeon Shin (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Hong-Keun Hyun (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Jung-Wook Kim (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Ki-Taeg Jang (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Young-Jae Kim (Department of Pediatric Dentistry, Dental Research Institute, School of Dentistry, Seoul National University)
  • Received : 2024.07.12
  • Accepted : 2024.08.12
  • Published : 2024.08.31
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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.

Keywords

References

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