Cephalometric Measurements Of Non-Syndromic Oligodontia In Early Dental Age In A Japanese Population

Hisayo Mayama,1 Yukinori Kuwajima,2 John D Da Silva,3 Shahrzad Khorashadi,2 R Frederick Lambert,2,4 Yoshiki Ishida,2 Shigemi Ishikawa-Nagai,2 Hiroyuki Miura,5 Kazuro Satoh1 1Division of Orthodontics, Department of Developmental Oral Health Science, School of Dentistry Iwate Medical University, Morioka, Iwate, Japan; 2Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, Boston, MA, USA; 3Department of Restorative Dentistry and Biomaterials Science, Harvard School of Dental Medicine, Boston, MA, USA; 4Department of Health Policy and Management, Harvard T. H. Chan School of Public Health, Boston, MA, USA; 5Division of Dental Education, Department of Oral Medicine, School of Dentistry Iwate Medical University, Morioka, Iwate, JapanCorrespondence: Shigemi Ishikawa-NagaiHarvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA, USATel +1-671-432-2928Fax +1-617-432-1897Email shigemi_nagai@hsdm.harvard.eduPurpose: Oligodontia significantly affects oral function and esthetics. Recognition of skeletal and dental patterns may aid in proper diagnosis and development of appropriate interventions. The aim of this study was to analyze skeletal and dental patterns for pre-adolescent patients with a diagnosis of oligodontia.Patients and methods: This study included 19 oligodontia patients (age: 9.5±1.3, Hellman’s developmental stage IIIA∼IIIB) along with a control group that comprised of 19 participants (age: 9.9±1.6) without any skeletal disharmony or congenitally missing teeth, with an Angle class I relationship and general crowding. Average cephalometric measurements among the oligodontia group were compared to the control group. The correlation between number of congenitally missing teeth (CMT) and each measurement was investigated. Skeletal measurements for both male and female patients in the oligodontia group and the control group were also compared.Results: No significant difference between the experimental and the control group was observed with respect to skeletal angular and linear measurements, except the gonial angle. Differences in dental pattern measurements were observed. The oligodontia group had significantly smaller Mo-Ms and Is-Mo than the control group (p