Fracture susceptibility of worn teeth.

Abstract:

:An experimental simulation study is made to determine the effects of occlusal wear on the capacity of teeth to resist fracture. Tests are carried out on model dome structures, using glass shells to represent enamel and epoxy filler to represent dentin. The top of the domes are ground and polished to produce flat surfaces of prescribed depths relative to shell thickness. The worn surfaces are then loaded axially with a hard sphere, or a hard or soft flat indenter, to represent extremes of food contacts. The loads required to drive longitudinal cracks around the side walls of the enamel to failure are measured as a function of relative wear depth. It is shown that increased wear can inhibit or enhance load-bearing capacity, depending on the nature of the contact. The results are discussed in the context of biological evolutionary pressures.

authors

Keown AJ,Bush MB,Ford C,Lee JJ,Constantino PJ,Lawn BR

doi

10.1016/j.jmbbm.2011.08.028

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

247-56

issue

1

eissn

1751-6161

issn

1878-0180

pii

S1751-6161(11)00237-2

journal_volume

5

pub_type

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