Degree of Conversion and Oxygen-Inhibited Layer Effect of Three Dental Adhesives

Lindsay Robertson; Melissa Phaneuf; Asmaa Haimeur; Igor Pesun; Rodrigo França

doi:10.3390/dj4040037

Degree of Conversion and Oxygen-Inhibited Layer Effect of Three Dental Adhesives

Dent J (Basel). 2016 Oct 27;4(4):37. doi: 10.3390/dj4040037.

Authors

Lindsay Robertson¹, Melissa Phaneuf², Asmaa Haimeur³, Igor Pesun⁴, Rodrigo França^{5

6}

Affiliations

¹ Dental Biomaterials Research Lab, College of Dentistry, University of Manitoba, Winnipeg, Manitoba R3E0W2, Canada. robertson_lindsay@hotmail.com.
² Dental Biomaterials Research Lab, College of Dentistry, University of Manitoba, Winnipeg, Manitoba R3E0W2, Canada. melissa.j.phaneuf@live.ca.
³ Department of Restorative Dentistry, College of Dentistry, University of Manitoba, Winnipeg, Manitoba R3E0W2, Canada. Asmaa.Haimeur@umanitoba.ca.
⁴ Department of Restorative Dentistry, College of Dentistry, University of Manitoba, Winnipeg, Manitoba R3E0W2, Canada. Igor.Pesun@umanitoba.ca.
⁵ Dental Biomaterials Research Lab, College of Dentistry, University of Manitoba, Winnipeg, Manitoba R3E0W2, Canada. Rodrigo.Franca@umanitoba.ca.
⁶ Department of Restorative Dentistry, College of Dentistry, University of Manitoba, Winnipeg, Manitoba R3E0W2, Canada. Rodrigo.Franca@umanitoba.ca.

Abstract

This study investigated the effect of the oxygen-inhibited layer on the degree of conversion (DC) of three dental adhesives, comparing two different protocols. Quartz-tungsten-halogen (QTH) light curing and light-emitting diode (LED) were used to cure three adhesives: OptiBond All in One (OAIO), Adper Easy Bond (AEB) and ExciteF (EXF). The DC was calculated utilizing Fourier Transform infrared spectroscopy (FTIR) (n = 12). The two protocols used were as follows: (i) prevent the oxygen-inhibited layer using a Mylar plastic strip pushed onto each bonding adhesive; and (ii) polymerize samples without a plastic strip. The data was analyzed statistically by a three-way ANOVA, and Tukey Test (a = 0.05). The presence of an oxygen-inhibited layer reduced the DC of the adhesives by 64% for EXF, 46% for AEB and 32% for OAIO. This study suggests that there are differences among the oxygen-inhibited layers present for the adhesives tested.

Keywords: degree of conversion; oxygen-inhibited layer; self-etch adhesives.