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KMID : 0950619950040010095
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Journanl of Allied Health Sciences
1995 Volume.4 No. 1 p.95 ~ p.101
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A Two Dimensional Analysis of stress Distribution in the Tooth and Inlay Body according to Cavity Form of the Abutment
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Oh Sae-Yoon
Kim Woong-Chul
Kim Ji-Hwan
Yoo Jin-Ho
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Abstract
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Because of the anatomical form of posterior teeth, the amount of tooth reduction near the marginal ridge area in the typical, widely used intracoronal cavity will be inevitably maximal, while occlusal forces on the restoration in this area will be relatively minimal In an attempt to dicrease the amount of tooth reduction at the marginal ridge area, a modified cavity for inlay with a uniform depth of 15mm, just as in amalgam filling was designed in this study.
To analize the stress development in the teeth in that cavity design, 2㎏/㎟ distributive forces were applied on the inlay restoratives and obtained results were compared with that in the typical cavity design which had a flat pulpal wall with a depth of 1.5m at the central fossa area.
Analysis was done with two dimensional finite technique.
The obtained results were as follows :
1. The patterns of stress distribution and displacement showed no apparent differences.
2. The stress values and the amount of displacement developed, both in inlay cast gold and in the teeth, in the cavity with a uniform depth were less than that in the cavity with a flat pulpal wall.
3. Greatest maximum principle values were concentrated around the interface between the base of inlay body and the teeth.
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