Effect of resin and photoinitiator on color, translucency and color stability of conventional and low-shrinkage model composites

Dragica Manojlovic; Miroslav D Dramićanin; Maja Lezaja; Pong Pongprueksa; Bart Van Meerbeek; Vesna Miletic

doi:10.1016/j.dental.2015.11.027

Effect of resin and photoinitiator on color, translucency and color stability of conventional and low-shrinkage model composites

Dent Mater. 2016 Feb;32(2):183-91. doi: 10.1016/j.dental.2015.11.027. Epub 2015 Dec 29.

Authors

Dragica Manojlovic¹, Miroslav D Dramićanin², Maja Lezaja¹, Pong Pongprueksa³, Bart Van Meerbeek³, Vesna Miletic⁴

Affiliations

¹ University of Belgrade, School of Dental Medicine, DentalNet Research Group, Rankeova 4, Belgrade, Serbia.
² University of Belgrade, Institute of Nuclear Sciences "Vinča", P.O. Box 522, Belgrade, Serbia.
³ BIOMAT, Department of Oral Health Sciences, KU Leuven (University of Leuven) & Dentistry, University Hospitals Leuven, Leuven, Belgium.
⁴ University of Belgrade, School of Dental Medicine, DentalNet Research Group, Rankeova 4, Belgrade, Serbia. Electronic address: vesna.miletic@stomf.bg.ac.rs.

PMID: 26743968
DOI: 10.1016/j.dental.2015.11.027

Abstract

Objective: To study the effect of a low-shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on color, translucency, and color stability of model resin-based composites (RBCs).

Methods: Four micro-hybrid RBCs were prepared containing barium-glass fillers in bisphenol A-glycidyl-methacrylate (BisGMA) and triethyleneglycol-dimethacrylate (TEGDMA) or urethane-based low-shrinkage monomer FIT-852 (FIT; Esstech Inc.) and TEGDMA matrix. Camphorquinone (CQ)/amine or Lucirin TPO were used as photoinitiators. Commercial low-shrinkage RBCs (Charisma Diamond, Heraeus Kulzer and N'Durance, Septodont) and conventional RBCs (Tetric EvoCeram, Ivoclar Vivadent and Filtek Z250, 3M ESPE) were used as controls. Color and translucency were measured using Thermo Scientific Evolution (Thermo Fisher Scientific) and SpectroShade™ Micro (MHT Optic Research) spectrophotometers. Color stability was evaluated after immersion in black tea (pure, with milk or lemon) and distilled water. Data were analyzed using analyses of variance with Tukey's post-test (α=0.05).

Results: Photoinitiators had no significant effect on baseline color. Initially whiter FIT-based RBCs showed greater staining in all staining solutions than BisGMA-based RBCs. TPO-containing RBCs showed better color stability than CQ-containing RBCs irrespective of the base monomer. Tea and tea with lemon induced greatest color changes. Adding milk to tea significantly reduced material staining.

Significance: Urethane-based low-shrinkage monomer FIT and conventional BisGMA affected color, translucency and color stability of their respective RBCs. Despite being used in posterior teeth, low-shrinkage RBCs are expected to have favorable optical and esthetic properties. Manufacturers are urged to provide information on optical properties of monomers and monomer mixtures in their low-shrinkage RBCs to allow understanding of interaction with fillers and photoinitiators.

Keywords: BisGMA; Camphorquinone; Color; Composite; Low-shrinkage; Lucirin TPO; Photoinitiator; Resin; Staining; Translucency.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Camphor / analogs & derivatives
Camphor / chemistry
Citrus
Color*
Composite Resins / chemistry*
Materials Testing
Milk
Phase Transition
Phosphines / chemistry
Photoinitiators, Dental / chemistry*
Polyethylene Glycols / chemistry
Polymethacrylic Acids / chemistry
Surface Properties
Tea

Substances

Charisma composite resin
Composite Resins
Filtek Z250
N'Durance composite resin
Phosphines
Photoinitiators, Dental
Polymethacrylic Acids
Tea
Tetric EvoCeram
triethylene glycol dimethacrylate
Polyethylene Glycols
Camphor
camphorquinone