Citation Information :
Ganesan L, Shivasubramanian L, Rengasamy V, Sekar V, Prabhakaran S, Hariharan A. Evaluation of the Effect of Various Surface Treatments on Bond Strength of Polyetheretherketone to Veneering Composite: An In Vitro Study. World J Dent 2025; 16 (1):40-44.
Aim: The present study aims to evaluate the efficacy of five different surface modification techniques on the surface roughness and bond strength of polyetheretherketone (PEEK) crowns.
Materials and methods: Sixty PEEK samples were made from BioHPP using the computer-aided design and computer-aided manufacturing (CAD-CAM) technique and were divided into six groups (n = 10): group A, control group (untreated samples); group B, samples treated with sandblasting; group C, samples treated with sulfuric acid; group D, samples treated with laser; group E, samples treated with a combination of sandblasting and sulfuric acid; and group F, samples treated with a combination of sandblasting and laser. The samples were then evaluated for surface roughness using a scanning electron microscope, after which composite veneering was done, and the shear bond strength was evaluated using a universal testing machine. Data were recorded and statistically analyzed.
Results: Surface roughness of untreated samples was 0.04 ± 0.02 µm. Values for groups B to F were 0.40, 0.66, 1.45, 1.25, and 2.72 µm, respectively. For shear bond strength, values for groups A to F were 3.94, 9.61, 12.56, 16.80, 16.35, and 23.95 MPa, respectively. Surface roughness of the PEEK material was found to be directly related to shear bond strength, and results suggest a synergistic effect when combining mechanical and chemical or laser treatments.
Conclusion: The untreated control had the least surface roughness and exhibited the lowest shear bond strength. The combination of sandblasted and laser-treated samples had the roughest surface and the highest shear bond strength.
Clinical significance: According to the results of this study, more aggressive and combination surface treatments, like sandblasting and laser treatment, provide the best results in terms of bond strength from a clinical standpoint. The effective interface between the PEEK core material and the veneering composite is a significant factor in determining the long-term successful clinical performance of PEEK-based restorations.
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