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Examination of craniofacial morphology in Japanese patients with congenitally missing teeth: a cross-sectional study.
Prog Orthod. 2018 Oct 01; 19(1):38.PO

Abstract

BACKGROUND

The purpose of this cross-sectional study was to investigate the effects of congenitally missing teeth on craniofacial morphology and to characterize the features of maxillofacial morphology of oligodontia patients associated with individual skeletal maturity by assessment with the cervical vertebrae maturation (CVM) method.

METHODS

A total of 106 non-syndromic Japanese patients with congenitally missing teeth (except for third molars) were selected and categorized into two groups according to the severity of congenitally missing teeth (hypodontia group, 1-5 missing teeth [n = 56]; oligodontia group, ≥ 6 missing teeth [n = 50]). A control group included orthodontic patients without either skeletal disharmony or congenitally missing teeth (n = 63). Subjects in oligodontia and control groups were further categorized into two subgroups on the basis of cervical stage (CS): stage I (CS2 or 3; n = 27 and n = 31, respectively) and stage II (CS4 or above; n = 23 and n = 32, respectively). Lateral cephalograms were analyzed by using eight angular and eight linear measurements. Z-scores were formulated on the basis of age and sex and were matched to the Japanese norm. Tukey tests and t tests were performed.

RESULTS

Compared with the control group, the hypodontia group had significantly smaller U1 to FH plane angle and A-B plane angle; U1-L1 was significantly larger. The oligodontia group had significantly smaller ANS-Me, L1 to mandibular plane angle, and Ptm-A; U1-L1 was significantly larger. At stage I, the oligodontia group had significantly smaller ANS-Me, gonial angle, and ANS-U1. At stage II, the oligodontia group had significantly smaller U1 to FH plane angle, L1 to mandibular plane angle, Ptm-A, and Go-Pog; it also had significantly larger U1-L1.

CONCLUSIONS

The present study suggested that skeletal patterns differ along with the number of congenitally missing teeth and that, in oligodontia patients, skeletal patterns differ before and after growth peak. It is important to consider the skeletal characteristics of tooth agenesis patients when designing a treatment plan.

Authors+Show Affiliations

Section of Maxillofacial Orthognathics, Department of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.Section of Maxillofacial Orthognathics, Department of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan. n-higashihori.mort@tmd.ac.jp.Section of Maxillofacial Orthognathics, Department of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.Section of Maxillofacial Orthognathics, Department of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.Section of Maxillofacial Orthognathics, Department of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30270414

Citation

Takahashi, Yuki, et al. "Examination of Craniofacial Morphology in Japanese Patients With Congenitally Missing Teeth: a Cross-sectional Study." Progress in Orthodontics, vol. 19, no. 1, 2018, p. 38.
Takahashi Y, Higashihori N, Yasuda Y, et al. Examination of craniofacial morphology in Japanese patients with congenitally missing teeth: a cross-sectional study. Prog Orthod. 2018;19(1):38.
Takahashi, Y., Higashihori, N., Yasuda, Y., Takada, J. I., & Moriyama, K. (2018). Examination of craniofacial morphology in Japanese patients with congenitally missing teeth: a cross-sectional study. Progress in Orthodontics, 19(1), 38. https://doi.org/10.1186/s40510-018-0238-9
Takahashi Y, et al. Examination of Craniofacial Morphology in Japanese Patients With Congenitally Missing Teeth: a Cross-sectional Study. Prog Orthod. 2018 Oct 1;19(1):38. PubMed PMID: 30270414.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Examination of craniofacial morphology in Japanese patients with congenitally missing teeth: a cross-sectional study. AU - Takahashi,Yuki, AU - Higashihori,Norihisa, AU - Yasuda,Yuko, AU - Takada,Jun-Ichi, AU - Moriyama,Keiji, Y1 - 2018/10/01/ PY - 2018/06/28/received PY - 2018/08/03/accepted PY - 2018/10/2/entrez PY - 2018/10/3/pubmed PY - 2019/3/19/medline KW - Congenitally missing teeth KW - Craniofacial morphology KW - Oligodontia KW - Tooth agenesis SP - 38 EP - 38 JF - Progress in orthodontics JO - Prog Orthod VL - 19 IS - 1 N2 - BACKGROUND: The purpose of this cross-sectional study was to investigate the effects of congenitally missing teeth on craniofacial morphology and to characterize the features of maxillofacial morphology of oligodontia patients associated with individual skeletal maturity by assessment with the cervical vertebrae maturation (CVM) method. METHODS: A total of 106 non-syndromic Japanese patients with congenitally missing teeth (except for third molars) were selected and categorized into two groups according to the severity of congenitally missing teeth (hypodontia group, 1-5 missing teeth [n = 56]; oligodontia group, ≥ 6 missing teeth [n = 50]). A control group included orthodontic patients without either skeletal disharmony or congenitally missing teeth (n = 63). Subjects in oligodontia and control groups were further categorized into two subgroups on the basis of cervical stage (CS): stage I (CS2 or 3; n = 27 and n = 31, respectively) and stage II (CS4 or above; n = 23 and n = 32, respectively). Lateral cephalograms were analyzed by using eight angular and eight linear measurements. Z-scores were formulated on the basis of age and sex and were matched to the Japanese norm. Tukey tests and t tests were performed. RESULTS: Compared with the control group, the hypodontia group had significantly smaller U1 to FH plane angle and A-B plane angle; U1-L1 was significantly larger. The oligodontia group had significantly smaller ANS-Me, L1 to mandibular plane angle, and Ptm-A; U1-L1 was significantly larger. At stage I, the oligodontia group had significantly smaller ANS-Me, gonial angle, and ANS-U1. At stage II, the oligodontia group had significantly smaller U1 to FH plane angle, L1 to mandibular plane angle, Ptm-A, and Go-Pog; it also had significantly larger U1-L1. CONCLUSIONS: The present study suggested that skeletal patterns differ along with the number of congenitally missing teeth and that, in oligodontia patients, skeletal patterns differ before and after growth peak. It is important to consider the skeletal characteristics of tooth agenesis patients when designing a treatment plan. SN - 2196-1042 UR - https://www.unboundmedicine.com/medline/citation/30270414/Examination_of_craniofacial_morphology_in_Japanese_patients_with_congenitally_missing_teeth:_a_cross_sectional_study_ L2 - https://dx.doi.org/10.1186/s40510-018-0238-9 DB - PRIME DP - Unbound Medicine ER -