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http://dx.doi.org/10.4041/kjod.2009.39.5.330

What determines dental protrusion or crowding while both malocclusions are caused by large tooth size?  

Sun, Min-Kyu (Department of Orthodontics, School of Dentistry, Chonnam National University)
Kim, Jae-Hyung (Department of Oral Medicine, School of Dentistry, Dental Science Research Institute, Chonnam National University)
Cho, Jin-Hyoung (Department of Orthodontics, School of Dentistry, Dental Science Research Institute, Chonnam National University)
Kim, Jeong-Moon (Korean Adult Occlusion Study Center)
Hwang, Hyeon-Shik (Department of Orthodontics, 2nd Stage of Brain Korea 21, School of Dentistry, Dental Science Research Institute, Chonnam National University)
Publication Information
The korean journal of orthodontics / v.39, no.5, 2009 , pp. 330-336 More about this Journal
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.
Keywords
Dental protrusion; Dental crowding; Cephalometric characteristics; Tooth size;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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