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Association between skeletal morphology and agenesis of all four third molars in Japanese orthodontic patients.
Odontology. 2018 Jul; 106(3):282-288.O

Abstract

The purpose of this study was to clarify differences in skeletal morphologies between male and female orthodontic patients with and without agenesis of all four third molars. A total of 64 patients (32 males and 32 females) with agenesis of all four third molars without agenesis of other teeth were selected as the third molars agenesis group (group 1). In addition, 64 patients (32 males and 32 females) with all these teeth were selected as controls (group 2). Lateral cephalograms taken between the ages of 14 and 30 years were used to compare skeletal morphology between groups 1 and 2 and between sexes. Maxillary length (P < 0.001), lower facial height (P < 0.05), gonial angle (P < 0.001) and mandibular plane angle (P < 0.001) were significantly smaller in group 1 than in group 2. Irrespective of the presence or absence of all four third molars, males had significantly smaller lower facial height (P < 0.01) and mandibular plane angle (P < 0.001) and significantly greater total mandibular length (P < 0.001), mandibular body length (P < 0.001) and mandibular ramus height (P < 0.001) than females. Japanese orthodontic patients with agenesis of all four third molars had significantly small maxillary length, lower facial height, gonial angle and mandibular plane angle.

Authors+Show Affiliations

Orthodontic Dentistry, The Nippon Dental University Niigata Hospital, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan. y.sugiki@ngt.ndu.ac.jp.Orthodontic Dentistry, The Nippon Dental University Niigata Hospital, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan.Orthodontics and Dentofacial Orthopedics, Field of Oral and Maxillofacial Growth and Development, Course of Clinical Science, The Nippon Dental University Graduate School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan.Orthodontics and Dentofacial Orthopedics, Field of Oral and Maxillofacial Growth and Development, Course of Clinical Science, The Nippon Dental University Graduate School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan. Department of Orthodontics, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29330705

Citation

Sugiki, Yoshiko, et al. "Association Between Skeletal Morphology and Agenesis of All Four Third Molars in Japanese Orthodontic Patients." Odontology, vol. 106, no. 3, 2018, pp. 282-288.
Sugiki Y, Kobayashi Y, Uozu M, et al. Association between skeletal morphology and agenesis of all four third molars in Japanese orthodontic patients. Odontology. 2018;106(3):282-288.
Sugiki, Y., Kobayashi, Y., Uozu, M., & Endo, T. (2018). Association between skeletal morphology and agenesis of all four third molars in Japanese orthodontic patients. Odontology, 106(3), 282-288. https://doi.org/10.1007/s10266-017-0336-z
Sugiki Y, et al. Association Between Skeletal Morphology and Agenesis of All Four Third Molars in Japanese Orthodontic Patients. Odontology. 2018;106(3):282-288. PubMed PMID: 29330705.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Association between skeletal morphology and agenesis of all four third molars in Japanese orthodontic patients. AU - Sugiki,Yoshiko, AU - Kobayashi,Yoshiki, AU - Uozu,Miwa, AU - Endo,Toshiya, Y1 - 2018/01/12/ PY - 2017/07/04/received PY - 2017/12/15/accepted PY - 2018/1/14/pubmed PY - 2018/12/12/medline PY - 2018/1/14/entrez KW - Cephalogram KW - Facial pattern KW - Japanese orthodontic patients KW - Skeletal morphology KW - Third molar agenesis SP - 282 EP - 288 JF - Odontology JO - Odontology VL - 106 IS - 3 N2 - The purpose of this study was to clarify differences in skeletal morphologies between male and female orthodontic patients with and without agenesis of all four third molars. A total of 64 patients (32 males and 32 females) with agenesis of all four third molars without agenesis of other teeth were selected as the third molars agenesis group (group 1). In addition, 64 patients (32 males and 32 females) with all these teeth were selected as controls (group 2). Lateral cephalograms taken between the ages of 14 and 30 years were used to compare skeletal morphology between groups 1 and 2 and between sexes. Maxillary length (P < 0.001), lower facial height (P < 0.05), gonial angle (P < 0.001) and mandibular plane angle (P < 0.001) were significantly smaller in group 1 than in group 2. Irrespective of the presence or absence of all four third molars, males had significantly smaller lower facial height (P < 0.01) and mandibular plane angle (P < 0.001) and significantly greater total mandibular length (P < 0.001), mandibular body length (P < 0.001) and mandibular ramus height (P < 0.001) than females. Japanese orthodontic patients with agenesis of all four third molars had significantly small maxillary length, lower facial height, gonial angle and mandibular plane angle. SN - 1618-1255 UR - https://www.unboundmedicine.com/medline/citation/29330705/Association_between_skeletal_morphology_and_agenesis_of_all_four_third_molars_in_Japanese_orthodontic_patients_ L2 - https://dx.doi.org/10.1007/s10266-017-0336-z DB - PRIME DP - Unbound Medicine ER -