Surface Roughness and Streptococcus mutans Adhesion on Metallic and Ceramic Fixed Prosthodontic Materials after Scaling

The aim of this study was to evaluate the surface roughness of fixed prosthodontic materials after polishing or roughening with a stainless steel curette or ultrasonic scaler and to examine the effect of these on adhesion and biofilm accumulation. Thirty specimens (10 × 10 × 3 mm ) of zirconia (Zr),...

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Bibliographic Details
Published in:Materials 2021-02, Vol.14 (4), p.1027
Main Authors: Hjerppe, Jenni, Rodas, Sampo, Korvala, Johanna, Pesonen, Paula, Kaisanlahti, Anna, Özcan, Mutlu, Suojanen, Juho, Reunanen, Justus
Format: Article
Language:English
Subjects:
Accumulation
Adhesion
Bacteria
Biofilms
Chromium
Contact angle
Dental calculus
Dental caries
Free energy
Hypotheses
Lithium
Roughening
Spinning (materials)
Stainless steel
Stainless steels
Surface roughness
Surface treatment
Titanium
Ultrasonic testing
Zirconium dioxide
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Summary:The aim of this study was to evaluate the surface roughness of fixed prosthodontic materials after polishing or roughening with a stainless steel curette or ultrasonic scaler and to examine the effect of these on adhesion and biofilm accumulation. Thirty specimens (10 × 10 × 3 mm ) of zirconia (Zr), pressed lithium disilicate (LDS-Press), milled lithium disilicate glazed (LDS-Glaze), titanium grade V (Ti) and cobalt-chromium (CoCr) were divided into three groups (n = 10) according to surface treatment: polished (C), roughened with stainless steel curette (SC), roughened with ultrasonic scaler (US). Surface roughness values (Sa, Sq) were measured with a spinning disc confocal microscope, and contact angles and surface free energy (SFE) were measured with a contact angle meter. The specimens were covered with sterilized human saliva and immersed into suspensions for bacterial adhesion. The biofilm was allowed to form for 24 h. Sa values were in the range of 0.008-0.139 µm depending on the material and surface treatment. Curette and ultrasonic scaling increased the surface roughness in LDS-Glaze ( < 0.05), Ti ( < 0.01) and CoCr ( < 0.001), however, surface roughness did not affect bacterial adhesion. Zr C and US had a higher bacterial adhesion percentage compared to LDS-Glaze C and US ( = 0.03). There were no differences between study materials in terms of biofilm accumulation.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14041027