Comparision of True Nano with Microhybrid and Nanocluster Composite Before and After Tooth Brushing .

V. Prakash, Pavan kumar, Sherin Banu, V. G. Sukumaran, A. Subbiya and P. Vivekanandhan

Department of  Conservative dentistry and Endodontics ,Sree Balaji Dental College and Hospital, Bharath University, Chennai, Tamilnadu, India.

Corresponding Author E-mail: drprakashmds@gmail.com

DOI : http://dx.doi.org/10.13005/bbra/2407

ABSTRACT: This in vitro study was undertaken to compare flowable true nano with microhybrid and nano cluster composites with references to polymerization shrinkage , surface roughness and wear resistance before and after tooth brushing. Three different composites G-Aenial Flo (true nano particles), Filtex P-90 (microhybrid) and Filtex Z 350 XT (Nano clusters) were used in this study and polymerization shrinkage was measured with stereo microscope (80 x magnification).The weight of the samples was checked using micro weighing balance (Mettler-Toledo).Tooth brush wear of the samples were done with the help of reciprocating toothbrush (Colgate 360) and universal testing machine. Three  body wear was carried out with 72,000 strokes for 8 minutes with continuous force of 1.7 newtons (200 grams load).The tooth paste slurry (150 mg of tooth paste diluted with 75ml of deionised water) were injected on to the sample continuously with the help of a syringe. Then weights of the samples were recorded after wear and surface roughness were checked before and after tooth brush wear by surface profilometer. Filtex Z350XT had significantly less weight loss and wear as compared to Filtex P-90 and G-aenial flo. G-aenial flo had significantly less roughness before and after wear. P 90 had significantly less polymerization shrinkage followed by Z350 XT and G-aenial flo. G-aenial flo showed better clinical performance in relation to wear and roughness compared to Filtek P90 and Filtek Z 350 XT.

KEYWORDS: Composite resin; polymerization shrinkage; surface roughness; tooth brush wear resistance

[ HTML Full Text]