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Article
Tooth attrition patterns in a group of Iraqi adults sample with different classes of malocclusion (A comparative study)

Authors: Issam M. Abdullah عصام عبد الله --- Ausama A. Al- Mulla اسامة احمد الملا
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 114-119
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Tooth attrition is wearing away of tooth structure during mastication. This study investigated tooth wearpatterns in adults with different classes of malocclusion and compared them with normal occlusion.Materials and methods: The sample consisted of 363 subjects that were divided into 5 groups with an age range “18-25” years: 85 normal occlusion, 128 class I with crowding, 90 class II division 1, 30 class II division 2 and 30 class III.Dental wear was assessed by using a modified version of the tooth wear index.Results:1. The class I malocclusion group had statistically greater tooth wear in incisal surfaces of maxillary central and lateralincisors, and mandibular lateral incisors than did the normal occlusion.2. The class II division 1 group had statistically greater tooth wear in the occlusal surfaces of maxillary secondpremolars, mandibular first and second premolars. Buccal surfaces of mandibular canines, mandibular secondpremolars and mandibular first molars than did the normal occlusion.3. The class II division 2 malocclusion group had statistically greater tooth wear in labial surfaces of mandibularcentral and lateral incisors. Buccal surfaces of mandibular second premolars, mandibular first molars. Occlusalsurfaces of maxillary first and second premolars and mandibular second premolars than did normal occlusion.4. The class III malocclusion group had statistically greater tooth wear in the occlusal surfaces of maxillary first andsecond premolars than did normal occlusion.Conclusion: In conclusion subjects with normal occlusion and those with different classes of malocclusions havedifferent tooth wear patterns


Article
Dental Wear Its Prevalence and Patterns in Class I Malocclusion (A Comparative Study)

Author: Kasem Ahmed Abeas
Journal: Medical Journal of Babylon مجلة بابل الطبية ISSN: 1812156X 23126760 Year: 2015 Volume: 12 Issue: 3 Pages: 828-835
Publisher: Babylon University جامعة بابل

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Abstract

Dental wear is a physiological process that occurs normally through a variety of mechanisms and age progression. It is aloss of tooth structure during masticatory forces. The study aimed to investigate patterns of tooth wear in adult with class I malocclusion (crowding) then the normal occlusion is compared with them. Our study sample consisted of 2 groups with an age range “18-25” years.The 1rstgroupwas (30 subject) with normal occlusion and the 2nd was (30 subject) with class I crowding. A modified version of the tooth wear index (TWI) was used to assess the amount of tooth wear.Tooth wear was greater statistically in incisal surfaces of central incisors of the upper arch and lateral incisors of both arches in class I malocclusion group than was in group of normal occlusion. While significant tooth loss was found in the buccal surfaces of the lower 1rst molar and the incisal surfaces of upper canines in normal occlusion than it was in crowding group. It was concluded that the irregularity of the dentition in class I malocclusion subjects lead to the differences in the pattern of tooth wear in both the normal and malocclusion groups.

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