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Craniofacial profile in Southern Chinese with hypodontia.
Eur J Orthod. 2009 Jun; 31(3):300-5.EJ

Abstract

The association between craniofacial morphology and congenitally missing teeth is at present unclear. The aims of this study were to investigate whether hypodontia is associated with changes in the sagittal skeletal profile and to identify putative relationships between the skeletal profile and the severity of hypodontia. In a cross-sectional analytical study, the craniofacial structure and profile based on two-dimensional lateral cephalograms of Southern Chinese hypodontia patients (n = 49, 24 males, 25 females, mean age 16.4 years) and a comparison group without hypodontia (n = 41, 15 males, 26 females, mean age 16.7 years) were compared. The hypodontia patients were divided into three subgroups according to the severity of hypodontia (mild: < or =5, moderate: 6-9, and severe: > or =10 congenitally missing permanent teeth). All hypodontia patients had a significantly reduced mandibular plane, ANB, and face height compared with the control group (P < 0.05). A significant increase in chin thickness was also observed in the hypodontia patients (P < 0.05). As the severity of hypodontia increased from moderate to severe, a tendency to develop a retrognathic maxilla and a Class III skeletal relationship was noted in addition to the above features, making the already thick chin even more prominent. Statistically significant correlations (Pearson's correlation coefficient) were found between the number of missing teeth and SNA, NAFH, and ANB angles, the mandibular plane, chin thickness, and face height. In Southern Chinese subjects, hypodontia was associated with a shorter face, a flatter mandibular plane, a more pronounced chin, and a Class III skeletal profile. In severe hypodontia subjects, the maxilla was more retrognathic with a greater predilection to a Class III skeletal relationship.

Authors+Show Affiliations

Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19193707

Citation

Chan, Doreen W S., et al. "Craniofacial Profile in Southern Chinese With Hypodontia." European Journal of Orthodontics, vol. 31, no. 3, 2009, pp. 300-5.
Chan DW, Samman N, McMillan AS. Craniofacial profile in Southern Chinese with hypodontia. Eur J Orthod. 2009;31(3):300-5.
Chan, D. W., Samman, N., & McMillan, A. S. (2009). Craniofacial profile in Southern Chinese with hypodontia. European Journal of Orthodontics, 31(3), 300-5. https://doi.org/10.1093/ejo/cjn111
Chan DW, Samman N, McMillan AS. Craniofacial Profile in Southern Chinese With Hypodontia. Eur J Orthod. 2009;31(3):300-5. PubMed PMID: 19193707.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Craniofacial profile in Southern Chinese with hypodontia. AU - Chan,Doreen W S, AU - Samman,Nabil, AU - McMillan,Anne S, Y1 - 2009/02/04/ PY - 2009/2/6/entrez PY - 2009/2/6/pubmed PY - 2009/8/11/medline SP - 300 EP - 5 JF - European journal of orthodontics JO - Eur J Orthod VL - 31 IS - 3 N2 - The association between craniofacial morphology and congenitally missing teeth is at present unclear. The aims of this study were to investigate whether hypodontia is associated with changes in the sagittal skeletal profile and to identify putative relationships between the skeletal profile and the severity of hypodontia. In a cross-sectional analytical study, the craniofacial structure and profile based on two-dimensional lateral cephalograms of Southern Chinese hypodontia patients (n = 49, 24 males, 25 females, mean age 16.4 years) and a comparison group without hypodontia (n = 41, 15 males, 26 females, mean age 16.7 years) were compared. The hypodontia patients were divided into three subgroups according to the severity of hypodontia (mild: < or =5, moderate: 6-9, and severe: > or =10 congenitally missing permanent teeth). All hypodontia patients had a significantly reduced mandibular plane, ANB, and face height compared with the control group (P < 0.05). A significant increase in chin thickness was also observed in the hypodontia patients (P < 0.05). As the severity of hypodontia increased from moderate to severe, a tendency to develop a retrognathic maxilla and a Class III skeletal relationship was noted in addition to the above features, making the already thick chin even more prominent. Statistically significant correlations (Pearson's correlation coefficient) were found between the number of missing teeth and SNA, NAFH, and ANB angles, the mandibular plane, chin thickness, and face height. In Southern Chinese subjects, hypodontia was associated with a shorter face, a flatter mandibular plane, a more pronounced chin, and a Class III skeletal profile. In severe hypodontia subjects, the maxilla was more retrognathic with a greater predilection to a Class III skeletal relationship. SN - 1460-2210 UR - https://www.unboundmedicine.com/medline/citation/19193707/Craniofacial_profile_in_Southern_Chinese_with_hypodontia_ L2 - https://academic.oup.com/ejo/article-lookup/doi/10.1093/ejo/cjn111 DB - PRIME DP - Unbound Medicine ER -