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 2023

Publication Date / Copyright Date

1-1-2023

Abstract

Objectives: The objective of this study was to evaluate the surface staining, color stability, blending effect, and depth of cure of a new generation resin composite. Materials and methods: Surface staining was tested using a total of 45 samples for each of the three resin composites (Tetric Prime, Filtek Supreme Ultra, and Omnichroma). Baseline spectrophotometer measurements were made before immersing into the following beverages: distilled water, cola, and coffee for 14 days. Specimens were then prepared and polished. To determine color stability, 30 resin composite specimens were prepared and measured using a spectrophotometer immediately after thermal cycling (between 5ºC and 55ºC), and 14 days of water storage (at 60°C). A total of 45 specimens were used to evaluate the blending effect. The evaluation was done using denture teeth (VITA Classical A1-D4 shades, SR Orthoplane DCL, LML3 Ivoclar, Amherst, NY) restored with the tested resin composites. The color difference (ΔE) values were obtained by using a spectrophotometer. The depth of cure was evaluated by using a total of 15 Typodont teeth. Preparation was created in the center of each tooth (4 x 4 mm diameter), then filled with the resin composites in single increments and photopolymerized. The surface hardness was measured using a Vickers microhardness indenter. Results: There was significantly higher staining caused by coffee compared to other solutions for all groups. Omnichroma showed the least staining in coffee solution with a significant difference compared to the other groups (p < 0.0001). Regarding color stability, there was a significant difference between Omnichroma and other resin composite groups in both water and thermal groups; Omnichroma had the least color stability. The best blending effect values were found in Omnichroma compared to other groups. None of the tested resin composites demonstrated a 4 mm depth of cure. Filtek Supreme Ultra presented better microhardness values at 0- and 0.5-mm depth. While Tetric Prime and Omnichroma showed a significantly higher percentage of polymerization from 0.5 to 3.5 mm depth. Conclusions: Omnichroma had the least surface staining and the best blending effect values. However, it had the lowest color stability. Tetric Prime and Omnichroma presented a higher percentage of polymerization than Filtek Supreme Ultra. While Filtek Supreme Ultra presented with better microhardness.

Disciplines

Dentistry

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