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Comparative Analysis of Biofilm Formation on Materials Used for the Fabrication of Implant-Supported Prostheses.

Authors :
Sadid-Zadeh R
Willis J
Forgo G
Haraszthy V
Source :
Brazilian dental journal [Braz Dent J] 2020 Sep 04; Vol. 31 (4), pp. 380-384. Date of Electronic Publication: 2020 Sep 04.
Publication Year :
2020

Abstract

The purpose of this study was to compare biofilm formation on materials used for the fabrication of implant-supported dental prostheses. Twenty discs (D=15 mm, H=3 mm) were fabricated from one of the following restorative materials: yttria tetragonal zirconia polycrystal (Y-TZP); commercially pure titanium (CP-Ti); or heat-cured polymethyl methacrylate (PMMA). Specimens were polished following standard protocols. A non-contact profilometer (NPFLEX, Bruker, UK) was used to assess the surface roughness of each disk; results were reported as Ra (µm). Five strains of Gram-negative bacteria frequently associated with peri-implantitis, Aggregatibacter actinomycetemcomitans, Candida. albicans, Porphyromonas gingivalis, Prevotella intermedia, and Tannerella forsythia, were cultured on hand-polished discs fabricated from heat-cured PMMA, Y-TZP, or CP-Ti to compare biofilm formation on each type of material. The results were reported as colony-forming units per milliliter (CFU/mL). One-way ANOVA and post hoc tests were used to compare surface roughness and bacterial colonization on the respective materials. Statistical significance was set at a = 0.05. Discs fabricated from Y-TZP had a significantly higher Ra value (350 ± 30 µm) than either PMMA, or CP-Ti discs. Discs fabricated from either Y-TZP and CP-Ti may exhibit less colonization by bacteria associated with peri-mucositis and peri-implantitis. Y-TZP and CP-Ti are suggested materials for fabrication of implant-supported prostheses, considering biofilm formation.

Details

Language :
English
ISSN :
1806-4760
Volume :
31
Issue :
4
Database :
MEDLINE
Journal :
Brazilian dental journal
Publication Type :
Academic Journal
Accession number :
32901713
Full Text :
https://doi.org/10.1590/0103-6440202003385