Comparative Evaluation of Surface Roughness and Color Stability of Polyetheretherketone with Conventional Interim...

The aim of this in vitro study was to compare the surface roughness and color stability of polyetheretherketone (PEEK) with those of conventional interim prosthetic materials like polymethylmethacrylate, bis-acrylic composite, and rubberized diurethane dimethacrylate, following immersion in solutions of varying pH value.

A total of 320 circular discs with 10 mm diameter and 2 mm height were divided based on the fabrication (n = 80)-group A: polymethylmethacrylate; group B: bis-acrylic composite; group R: rubberized diurethane; and group P: hot-pressed PEEK-and were subjected to baseline measurement of roughness (n = 40) and color (n = 40) using 3D profilometer and UV-Vis spectrophotometer, respectively. Later, 10 samples from each group were immersed in distilled water, black coffee, green tea, and Pepsi, respectively, for 120 days, and measurements of roughness and color were repeated. The differences in roughness (ΔR^a) and color change(ΔE) were calculated and statistically analyzed with a significance level of p-value < 0.05.

Irrespective of the immersion solution, the highest mean difference in the roughness values was shown by rubberized diurethane specimens: ΔR^a = 3.574880 (0.0048350) in carbonated beverages, and lowest difference was shown by bis-acrylic composite: ΔR^a = 0.29004 (0.0017473) in distilled water. The greatest color stability was exhibited by PEEK. The type of interim material and immersion solution had a statistically significant effect on change in color and roughness values.

The immersion in solutions of varying pH had a significant effect on surface roughness and color stability of all the tested materials. The R^a value of all specimens after immersion was still within the clinically acceptable range. Polyetheretherketone was the most color stable material in all solutions, except in green tea.

This study will provide guidance to dentists and patients regarding the selection of interim material for long-term use, depending on the effect of beverage consumption on its color stability and roughness. How to cite this article: Saraswathy A, Latha N, Ayyadanveettil P, et al. Comparative Evaluation of Surface Roughness and Color Stability of Polyetheretherketone with Conventional Interim Prosthetic Materials: An In Vitro Study. J Contemp Dent Pract 2024;25(10):930-935.