Effect of metal strengthener length on stress distribution in acrylic denture bases: a finite element study

Journal of Oral Rehabilitation
H ShimizuT Ohyama

Abstract

This study investigated the influence of metal strengthener length on stress created in acrylic denture bases in relation to location of the vertical support to the dentures. Finite element analysis was conducted to calculate stress generated in the straps of 2 mm-thickness and 18 mm-width that were reinforced with metal strengtheners of five different lengths. A vertical biting force of 60 N was directed on one end of each strap, while the other end was fixed. Vertical movements were restricted at one of the three support locations between the centre of the strap and the loading site. When the straps were vertically supported near the loading site, greater maximum tensile stresses were seen in the straps with relatively short strengtheners than those shown in the straps with longer strengtheners. The metal strengtheners with sufficient length may provide a preventive denture design against the acrylic fractures.

Citations

May 2, 2012·Acta Odontologica Scandinavica·Toshihito TakahashiYosinobu Maeda
Mar 5, 2013·Journal of the Mechanical Behavior of Biomedical Materials·Natsuko MurakamiYoshimasa Igarashi
Jun 26, 2009·Journal of Oral Rehabilitation·M KibiY Maeda
Mar 21, 2015·The Journal of Prosthetic Dentistry·Takashi SekinishiNoriyuki Wakabayashi
Nov 29, 2016·Journal of Oral Rehabilitation·T TakahashiY Maeda

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