Effect of Developmental Disorders of Maxillary First Molars on Orofacial Morphology (악안면 형태에 대한 상악 제1대구치 발육장애의 영향)

Soyoung Park (박소영); JEONG,TAE-SUNG (정태성); Jiyeon Kim (김지연); Shin Kim (김신)

doi:10.5933/JKAPD.2019.46.2.209

Effect of Developmental Disorders of Maxillary First Molars on Orofacial Morphology

Journal of the Korean academy of pediatric dentistry
Abbr : J Korean Acad Pediatr Dent
2019, 46(2), pp.209~218
DOI : 10.5933/JKAPD.2019.46.2.209
Publisher : The Korean Academy Of Pediatric Dentistry
Research Area : Medicine and Pharmacy > Dentistry
Received : September 20, 2018
Accepted : November 14, 2018
Published : May 30, 2019

Soyoung Park ¹, JEONG,TAE-SUNG ², Jiyeon Kim ², Shin Kim ²

¹부산대학교 치의학전문대학원 소아치과학교실
²부산대학교

Accredited

ABSTRACT

This study was aimed to evaluate orofacial morphologies on the cases of developmental disorders of maxillary first molars. Panoramic radiographs, lateral cephalographs, and clinical photos of 2983 children who attended the Pediatric Dental Clinic of Pusan National University Dental Hospital from 2006 to August 2017 were assessed retrospectively. 34 patients were selected whose maxillary first molars were missed or developmentally delayed unilaterally or bilaterally. Demirjian’ s method was used for estimating dental age, then which was compared to chronologic age of children. Parameters expressing skeletal and dentoalveolar disharmony were checked and compared with control. Additionally, occlusion relationship was evaluated. Maxillary dental age was significantly delayed compared to chronologic age. Several parameters which show skeletal open-bite tendency and skeletal class III malocclusion with maxillary retrusion were statistically significant. Anterior crossbite and edge-bite were expected in most of these cases, but compensation by occlusion and soft tissue was also verified which might mask skeletal class III tendency. Congenital missed or developmentally delayed maxillary first molars might be related with declined growth of maxilla. If developmental disorders of maxillary first molars were verified during clinical examination, careful monitoring of orofacial growth was necessary during puberty and timed orthopedic and orthodontic intervention were considered.

KEYWORDS

Maxillary first molar, Congenital missing, Delayed development, Skeletal class III malocclusion

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Journal of the Korean academy of pediatric dentistry 2023 KCI Impact Factor : 0.48

Effect of Developmental Disorders of Maxillary First Molars on Orofacial Morphology

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* References for papers published after 2023 are currently being built.

Journal of the Korean academy of pediatric dentistry 2023 KCI Impact Factor : 0.48

Effect of Developmental Disorders of Maxillary First Molars on Orofacial Morphology

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KEYWORDS

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