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Variation in labial shoulder geometry of metal ceramic crown preparations: a finite element analysis

Seymour, K.G., Taylor, M., Samarawichrama, D.Y. and Lynch, E. (1997) Variation in labial shoulder geometry of metal ceramic crown preparations: a finite element analysis European Journal of Prosthodontontics and Restorative Dentistry, 5, (3), pp. 131-136.

Record type: Article


Recent studies have highlighted variations in the geometry of teeth prepared to receive metal ceramic crowns, particularly in the region of the labial shoulder, where shoulder designs have often involved less reduction than is recommended. Using two-dimensional finite element analysis, this study subjected crowns, superimposed upon preparations with clinically common labial margin designs, to loads of 200N in three different directions. The resultant stress distribution within the labial marginal porcelain was examined. Results imply that variations in the marginal preparation geometry of metal ceramic crowns influenced the stress response of the finished crown. Within the limits of this study, a crown constructed a 1.3mm chamfer preparation appeared to have the best response to a simulated load applied to the palatal/incisal surface, at 45 degrees to the long axis.

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Published date: 1997


Local EPrints ID: 21215
ISSN: 0965-7452
PURE UUID: 2b8fda2d-745c-4ccf-9b0e-f08f9bb55974

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Date deposited: 10 Nov 2006
Last modified: 17 Jul 2017 16:27

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Author: K.G. Seymour
Author: M. Taylor
Author: D.Y. Samarawichrama
Author: E. Lynch

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