Color assessment of Poly Ether Ketone Ketone veneered with different materials with different thicknesses an invitro study

Document Type : Original Article

Authors

Fixed Prosthodontics Department, Faculty of Dentistry, Minia University

Abstract

The purpose of this study is to evaluate the color of PEKK veneers made of various materials and thicknesses.
Materials and Methods:The PEKK blanks were used to create 45 discs, totaling 45. They were divided into three groups (n=15) based on the type of veneering materials employed.Discs made of PEKK and veneered with zirconia (Bruxiur) fall into Group A, while those made of lithium disilicate (IPS E.max CAD) and hybrid ceramic (Vita Enamic) make up Group B and Group C, respectively.Then, we divided each group into three subgroups (n=5) based on the thickness of the veneering materials: 0.7, 1.00, and 1.3 mm. Each group's veneering materials were adhered to the treated PEKK surface using Total cem, a dual cure self-adhesive cement. After the specimens were made, they were tested for color change using a spectrophotometer. Then, all of the samples were subjected to thermo cycling, which varies the temperature from 5°C to 55°C at 5,000 cycles. After that, the samples were tested again using the spectrophotometer. The collected data was tallied and analyzed statistically. Thermo cycling results show that E-max has the greatest increase in color change at a thickness of 0.7 mm, whereas zirconia exhibits the lowest change at a thickness of 1.3 mm. In conclusion, the amount to which the restoration materials changed color from their chosen shade was affected by the thickness of the veneering materials. Thermocycling changed the color of PEKK veneer, and zirconia was determined to be the most important material for the veneer.

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Egyptian Dental Journal
Volume 71, Issue 3 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2025
Pages 2427-2437

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