SPECTROPHOTOMETRIC ANALYSIS OF DISCOLORED ANTERIOR TEETH RESTORED WITH PREFAPRICATED COMPOSITE RESIN VENEERS

Abd Elbaky, Mahmoud A; Shalaby, Yousreya A; Azer, Amir S; ElSharkawy, Fatma M

doi:10.21608/adjalexu.2016.58042

SPECTROPHOTOMETRIC ANALYSIS OF DISCOLORED ANTERIOR TEETH RESTORED WITH PREFAPRICATED COMPOSITE RESIN VENEERS

Document Type : Original Article

Authors

¹ Bachelor of Dentistry, BDS, Faculty of Dentistry, Alexandria University, Alexandria, Egypt

² Professor of Fixed prosthodontics, BDS, MSc, PhD, Faculty of Dentistry, Alexandria University, Alexandria, Egypt

³ Lecturer of Fixed prosthodontics, BDS, MSc, PhD, Faculty of Dentistry, Alexandria University, Alexandria, Egypt

⁴ Researcher at Photometry and colorimetry Department, National Institute of Standards, Cairo, Egypt.

10.21608/adjalexu.2016.58042

Abstract

INTRODUCTION: Veneers are considered the least invasive most reliable solution for treatment of discolored anterior teeth. Edelweiss system is a polymerized, prefabricated, laser-machined, radiopaque, highly-filled nano-hybrid composite enamel shells with a highly glossy inorganic surface. They have a facial anatomical pattern in the shape of a thin composite shell bonded to labial surface of anterior teeth with composite resin, which allows for easy direct veneering of single and multiple anterior teeth.
OBJECTIVES Spectrophotometric analysis of discolored anterior teeth restored with Edelweiss veneer system bonded with different shades of composite resin.
MATERIALS AND METHODS: Twenty Edelweiss veneers bonded with different shades of composite resin (A2, opaque white and translucent shades) to dies of different shades. Specimens were divided into four groups, each group consists of five specimens, according to the shade of the bonding composite resin used and the shade of the dies. Spectrophotometer was used to evaluate the effect of using different shades of the bonding composite on the final shade of the restoration. Also, to assess the light reflection, transmission and absorption of the Edelweiss Veneer System.
RESULTS: The L*a*b* coordinates values of the Edelweiss Veneer Systems were affected by the shade of bonding composite (P<0.05). The use of an opaque bonding composite resulted in an increase of the color coordinates a*, b*, L*, producing the greatest effect on color change, light transmission and light reflection (P<0.05). Light absorption values of the specimens were not affected by the shade of the bonding composite. CONCLUSIONS: On using Edelweiss veneer system, the greatest color shifts and change in light transmission and light reflection were obtained when using opaque shade composite for bonding of the veneers to the substrates. While light absorption was of a non-significant value among the groups.

Keywords

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