What determines dental protrusion or crowding while both malocclusions are caused by large tooth size?.
10.4041/kjod.2009.39.5.330
- Author:
Min Kyu SUN
1
;
Jae Hyung KIM
;
Jin Hyoung CHO
;
Jeong Moon KIM
;
Hyeon Shik HWANG
Author Information
1. Department of Orthodontics, School of Dentistry, Chonnam National University, Korea.
- Publication Type:Original Article
- Keywords:
Dental protrusion;
Dental crowding;
Cephalometric characteristics;
Tooth size
- MeSH:
Humans;
Hyoid Bone;
Malocclusion;
Molar;
Tongue;
Tooth
- From:Korean Journal of Orthodontics
2009;39(5):330-337
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To examine the differences in lateral cephalometric characteristics between patients with dental protrusion and crowding in order to determine what factors affect dental protrusion or crowding while both malocclusion types are caused by large tooth size. METHODS: Twenty nine individuals with dental protrusion and 22 individuals with dental crowding were enrolled in this study. All subjects had larger teeth than average and Class I molar relationships. Craniofacial characteristics and hyoid bone positions were determined from lateral cephalograms and compared between the two groups. RESULTS: In the comparisons of craniofacial characteristics, the measurements indicating maxillary length and facial convexity showed greater values in the protrusion group than in the crowding group. Comparisons of hyoid bone positions showed that the hyoid bone was positioned more anteriorly and superiorly in the protrusion group than in the crowding group. CONCLUSIONS: The results of the present study indicate that some craniofacial characteristics and tongue position may affect the development of dental protrusion or crowding; when an individual has large teeth, dental protrusion or crowding might be determined according to maxillary growth and tongue position.
