Effects of toothbrushing on surface characteristics of microhybrid and nanofilled resin composites following different finishing and polishing procedures

To evaluate the effects of simulated tooth brushing (STB) on the surface roughness of microhybrid and nanofilled resin composites following different finishing and polishing procedures. Ninety cylindrical-shaped specimens of Filtek Supreme XT (a universal nano resin composite) and Filtek Z250 (a uni...

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Bibliographic Details
Published in:Journal of dentistry 2020-08, Vol.99, p.103376-103376, Article 103376
Main Authors: Daud, Alaa, Adams, Alexander J., Shawkat, Athra, Gray, Gordon, Wilson, Nairn H.F., Lynch, Christopher D., Blum, Igor R.
Format: Article
Language:English
Subjects:
Aesthetics
Biofilms
Composite materials
Composite Resins
Dental Polishing
Dentistry
Diamonds
Finishing
Finishing procedures
Irregularities
Materials Testing
Microscopy, Electron, Scanning
Morphology
Mylar
Polishing
Polymer matrix composites
Profilometers
Resin composites
Resins
Scanning electron microscopy
Surface Properties
Surface roughness
Surface treatment
Toothbrushing
Tungsten
Tungsten carbide
Variance analysis
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Summary:To evaluate the effects of simulated tooth brushing (STB) on the surface roughness of microhybrid and nanofilled resin composites following different finishing and polishing procedures. Ninety cylindrical-shaped specimens of Filtek Supreme XT (a universal nano resin composite) and Filtek Z250 (a universal microhybrid resin composite) were prepared. The specimens were allocated at random into 9 paired groups each of 10 specimens. The finishing and polishing systems included were Tungsten Carbide bur (TC); Diamond bur (Db); Sof-Lex discs (S); PoGo discs (PG); TC + S; Db + S; TC + PG; Db + PG. Polymerisation against a Mylar strip without finishing and polishing acted as the control. Surface roughness was measured using a 3D non-contact optical profilometer and surface morphology was examined by scanning electron microscopy. Specimens were subjected to the equivalent of four years STB and surface roughness was measured again. Mylar formed surfaces were the smoothest for both composites before and after STB. Finishing with the diamond finishing bur caused significantly greater surface irregularity (p 
ISSN:0300-5712
1879-176X
DOI:10.1016/j.jdent.2020.103376