Evaluation of the effect of some denture cleansers on the colour of acrylic resin denture base materials

Abstract EN

The aims of this study were to ev-aluate the effect of denture cleansers on the colour of acrylic resin denture base material, and to evaluate the effect of par-ticle size and surface roughness of acrylic resin material on their colour change.

Sixty four acrylic specimens were pr-epared from the three types of acrylic resin materials of 30×20×1.5 mm (length × wid-th × thickness, respectively).

After the con-ditioning in distilled water, they were im-mersed in eight types of denture cleansers for 7 days.

The colour changes were asse-ssed using a computerized ultraviolet–visi-ble spectrophotometer with accuracy up to 0.001.

Visual examination of colour chan-ge was done by three independent exami-ners.

The analysis of particle size was per-formed with a sieving machine.

The sur-face roughness of acrylic specimens was measured using a computerized surface texture measuring and recording machine (Perthometer).

A statistical analysis was performed using analysis of variance and Duncan's Multiple Range Test.

The results revealed that there was a significant differ-ence at p ≤ 0.01 between the tested solu-tions and also between the three types of acrylic resin materials.

It was concluded that denture clean-sers induced colour change of acrylic resin denture base materials.

The self–curing acrylic exhibited the highest colour chan-ge.

The smaller particle size and the smoo-thest surface of resin materials decreased the amount of colour change.