Reinforcement by affixing metal plate. Part 2. An experimental study on the upper complete denture

Abstract

Fracture of an acrylic denture base has been a problem for all dentists and dental laboratory technicians.We have previously reported that the most effective reinforcement could be obtained when athin metal plate were affixed to the tensile side of acrylic resin with an adhesive resin.In this paper, we report the effect of a swaged metal plate reinforcement of maxillary denture.The results were as follows:1. When a load was applied to the molar region of maxillary complete denture, the incisal papillae and posterior palatal area of denture base were the region of tensile strain, and labial and central palatal area were the region of compressive strain.2. The strain was reduced if the metal plate was affixed to the polishing side of the anterior palatal area of denture base.3. The reinforcement to the denture base resulted in 36 percent to 58 percent decrease in tensile strain in the incisal papillae area, and in 90 percent to 93 percent decrease in compressive strain in the plicae palatine area.From these results, we conclude that the metal plate reinforcement is an effective technique for improvement of the flexural rigidity.