Descriptive study of fluorescence in different fixation materials exposed to 405 nm LED light

Abstract

Objective: To evaluate the fluorescence of various fixation materials exposed to 405 nm LED light.

Methods: A descriptive and observational study was conducted. Samples measuring 1 cm in diameter and 0.8 mm thick were designed using a Smile Line #7015 stainless steel fixture. Ten samples of different light-curing and dual-curing luting composites were manufactured (Variolink LC: Neutral, Warm, Light+, and Warm+; Variolink DC: Neutral, Light+, Warm+, and Light; and Variolink Hybrid Abutment, all from Ivoclar Vivadent; and Panavia Universal Cement - Kuraray). These samples were exposed, along with a tooth, to a 405 nm LED light source located at a distance of 4 cm. Images were obtained with a fixed mobile device.

Results: All samples responded differently when exposed to light. The Variolink DC Light and Variolink DC Neutral (Ivoclar Vivadent) samples were the most tooth-like, while the Variolink LC Light+ and Variolink DC Light+ samples exhibited superfluorescence.

Conclusions: The fluorescence response of light-curing and dual-curing composite luting materials varied under 405 nm LED light. Greater translucency resulted in lower fluorescence, and greater opacity resulted in higher fluorescence.