Citation Information :
Nemani SM, Chidambaranathan AS, Balasubramanium M. Outcome of Disinfection on Color Stability and Surface Roughness of Polyetheretherketone: An In Vitro Study. Int J Prosthodont Restor Dent 2024; 14 (2):80-85.
Purpose: To evaluate the color stability and surface roughness of PEEK after immersion in 10% povidone-iodine, 4% chlorhexidine gluconate, 2% glutaraldehyde, 5% sodium hypochlorite, and neutral soap disinfectant solutions.
Materials and methods: A total of 40 polyetheretherketone (PEEK) disk-shaped samples of diameter 10 and 3 mm thickness [according to International Organization for Standardization (ISO) 7491:2020] were sectioned and immersed in the disinfectant solution for 30 days for 10 minutes, twice a day. The disinfectant solutions included were 10% povidone-iodine, 4% chlorhexidine gluconate, 2% glutaraldehyde, 5% sodium hypochlorite, and neutral soap solution. Color stability was measured using a calorimeter after 30 days, and surface roughness was evaluated using a surface roughness tester. The color stability and surface roughness values were statistically analyzed using one-way analysis of variance (ANOVA) and Tukey's post hoc test.
Results: The mean color stability (ΔE) of PEEK after disinfection with neutral soap, 4% chlorhexidine gluconate, 5% sodium hypochlorite, 10% povidone-iodine, and 2% glutaraldehyde were 1.286 ± 0.208, 1.156 ± 0.261, 2.965 ± 0.292, 0.729 ± 0.309, and 0.601 ± 0.246, respectively, and the difference is statistically significant (p = 0.001). The post hoc test showed a significant difference in color change between different disinfectants except for chlorhexidine-neutral soap solution (p = 0.863) and glutaraldehyde-povidone-iodine (p = 0.871). The surface roughness of the control, chlorhexidine gluconate, sodium hypochlorite, neutral soap solution, povidone-iodine, and glutaraldehyde were 0.084 ± 0.026, 0.176 ± 0.080, 0.138 ± 0.064, 0.092 ±0.025, 0.086 ±0.033, and 0.095 ±0.032 µm, respectively, where p >0.05 for all group comparison except between chlorhexidine with neutral soap, glutaraldehyde, and sodium hypochlorite.
Conclusion: Polyetheretherketone materials immersed in 5% sodium hypochlorite showed increased color change, while the least change was observed with 2% glutaraldehyde. Around 4% chlorhexidine gluconate produced more surface roughness. Hence, 2% glutaraldehyde is recommended as a disinfectant for PEEK-based prostheses, and immersion of PEEK prosthesis in 5% sodium hypochlorite solution should be avoided.
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