Multiple crown size variables of the upper incisors in patients with supernumerary teeth compared with controls.

Khalaf, K ORCID: 0000-0002-5688-6571, Smith, RN, Elcock, C and Brook, AH ORCID: 0000-0002-3484-3888 (2009) Multiple crown size variables of the upper incisors in patients with supernumerary teeth compared with controls. Archives of oral biology, 54 Sup (1). S71-S78.

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Abstract

<h4>Aims</h4>As part of ongoing studies of the aetiology of dental anomalies the aims of this study were to identify multiple components of tooth size of the upper permanent incisors in 34 patients with supernumerary teeth and to compare them with those in a control group to determine whether the presence of a supernumerary tooth has a local effect on the size of the surrounding dentition.<h4>Methods and results</h4>The labial and occlusal aspects of the clinical crowns of the upper permanent central and lateral incisors on the study models of 74 subjects were digitally imaged and measured using an image analysis system and automated macro (34 patients with supernumerary in the upper incisor region: 17 males and 17 females and 40 controls: 20 males and 20 females). The macro-defined 17 variables from each view. From the labial view these were: the mesio-distal and occluso-gingival length and additional measurements along 25 and 75% of the mesio-distal line and at 25, 50 and 75% along the occluso-gingival line such that all these sub-divisions extended to the periphery of the tooth. From the occlusal view these were: the mesio-distal and labio-lingual lengths, and additional variables that sub-divided the mesio-distal again at 25 and 75% along the length and at 25, 50 and 75% along the labio-lingual dimension. Principal component analysis (PCA) was used to identify the key factors with the most random variability. Comparisons were then carried out between the supernumerary cases and control group using 2-way ANOVA. Seven factors of tooth size for the upper central incisors and eight factors for the upper lateral incisors were extracted. Most of these variables were found to be larger in the supernumerary group than in the control. Statistically significant differences were found for 5 out of 7 and 4 out of 8 for the upper central and lateral incisors respectively.<h4>Conclusions</h4>A number of factors of tooth size were identified and found to be larger in the supernumerary group compared to the control (7 for upper central and 8 for upper lateral incisors); the majority reached the 0.05 significance level. Tooth crown size of the upper central incisor was affected more than that of the upper lateral incisor, supporting a local field effect.

Item Type:	Article
Additional Information:	MATCHED FROM WOS Journal article Archives of oral biology Arch Oral Biol. 2008 Dec 18. ## TULIP Type: Articles/Papers (Journal) ##
Uncontrolled Keywords:	Incisor, Tooth Crown, Humans, Tooth, Supernumerary, Odontometry, Analysis of Variance, Principal Component Analysis, Image Processing, Computer-Assisted, Adolescent, Child, Female, Male, Models, Dental
Subjects:	?? RK ??
Divisions:	Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences > School of Dentistry
Depositing User:	Symplectic Admin
Date Deposited:	20 Oct 2009 09:07
Last Modified:	16 Mar 2024 13:25
DOI:	10.1016/j.archoralbio.2008.10.006
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/1021