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Importance of teeth in maintaining the morphology of the adult mandible in humans.
- Source :
- European Journal of Oral Sciences; Oct2015, Vol. 123 Issue 5, p341-349, 9p, 2 Diagrams, 4 Charts
- Publication Year :
- 2015
-
Abstract
- Edentulism can negatively affect both masticatory performance and dietary intake by altering the patterns of biomechanical stress and strain, which in turn modifies the morphology of the different regions of the mandible. The morphological changes in the mandible caused by these stressors are unknown when comparing mandibles across varying dentition states. This study investigated differences in the morphology of human mandibles across various states of the dentition. In total, 498 mandibles of individuals between 20 and 80 yr of age at death were sourced from the Raymond A. Dart Collection of Human Skeletons. These included fully dentate ( n = 95), partially edentulous ( n = 333), and fully edentulous ( n = 70) mandibles. Twelve linear anthropometric measurements of the mandible were derived from digitized landmarks located on its external surface. Data analysis included geometric morphometrics and multivariate analyses. Compared with dentate and partially edentulous mandibles, fully edentulous mandibles showed a shorter alveolar height (−0.4 mm), a shorter mandibular body length (−4 mm), a larger gonial angle (+4°), a more obtuse mental angle (+4.7°), a broader bicondylar width (+3.8 mm), and a taller ramus height (+1.6 mm). Thus, edentulous states are associated with an altered mandibular morphology, which may result from a reduction in jaw function. [ABSTRACT FROM AUTHOR]
- Subjects :
- TEETH
MANDIBLE
ANALYSIS of covariance
ANALYSIS of variance
MULTIVARIATE analysis
RESEARCH evaluation
RESEARCH funding
STATISTICS
TOOTH loss
DATA analysis
INTER-observer reliability
REPEATED measures design
DATA analysis software
DESCRIPTIVE statistics
IN vitro studies
DISEASE complications
PHYSIOLOGY
ANATOMY
Subjects
Details
- Language :
- English
- ISSN :
- 09098836
- Volume :
- 123
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- European Journal of Oral Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 109364243
- Full Text :
- https://doi.org/10.1111/eos.12203