Student Theses, Dissertations and Capstones

Document Type

Thesis - NSU Access Only

Degree Name

Master of Science (M.S.) in Dentistry

Copyright Statement

All rights reserved. This publication is intended for use solely by faculty, students, and staff of Nova Southeastern University. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, now known or later developed, including but not limited to photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author or the publisher.

Department

College of Dental Medicine

First Advisor

Sibel Antonson

Date of original Performance / Presentation

January 2021

Publication Date / Copyright Date

1-1-2021

Abstract

Objectives: 1-To evaluate the average surface roughness of a new resin composite when subjected to different polishing systems. 2-To evaluate the gloss sustainability of resin composites after being subjected to different polishing systems. 3-To evaluate the radiopacity of a resin composite in comparison to two other products. Materials and Methods: A total of 81 disk-shaped specimens composed of three types of resin composites: (Tetric Prime, Filtek Supreme Ultra, and Omnichroma) were prepared. Samples were polished with one of the 3 polishing systems: (OptraGloss, Super-Snap Polishing disk, and PoGo Polishing disk) until desired outcomes were accomplished. The surface gloss (GU) was measured with a Glossometer. Surface roughness (Ra) was measured with a Profilometer before and after polishing procedures. Gloss sustainability was measured using Glossometer before and after simulated toothbrushing representation of 3 months with 1,500 cycles, by using an automatic brushing device (V-8 Cross Brushing Machine). Radiopacity was examined by preparing new sets of specimens. A total of nine samples, three sets with different thickness of each resin composite were prepared. An aluminum step wedge which is a part of the Phantom device was used as control. Radiographs were taken with size #2 XDR CMOS sensors. The images were analyzed using the ImageJ program to obtain the mean grey values. Results: There was no significant difference in the surface roughness between evaluated resin composites. There was significantly higher roughness caused by Super-Snap group compared to all other groups. PoGo produced the best gloss values, whereas Super Snap had the least surface polish and gloss performance. Regarding gloss sustainability, Tetric Prime had the best results with a significant difference (p<0.001). Statistically significant difference was found among the radiopacities of resin composites. Tetric Prime presented the highest radiopacity values, Omnichroma showed the lowest. Conclusions: Tetric Prime; the new tested resin composite performed superiorly in two out of the three conducted studies (gloss sustainability and radiopacity). For the surface roughness, its results were average compared to other resin composites.

Disciplines

Dentistry

Keywords

composite; gloss; radiopacity ; resin; surface roughness

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