Bonding of acid-etch and self-etch adhesives to human fluorosed dentine

Waidyasekera, P.G.K.; Nikaido, T.; Weerasinghe, D.D.S.; Tagami, J.

doi:10.1016/j.jdent.2007.09.002

« Previous Next »Journal of Dentistry
Volume 35, Issue 12 , Pages 915-922, December 2007

Bonding of acid-etch and self-etch adhesives to human fluorosed dentine

P.G.K. Waidyasekera
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate school, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
- Corresponding author. Tel.: +81 3 5803 5483; fax: +81 3 5803 0195.
T. Nikaido
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate school, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
D.D.S. Weerasinghe
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate school, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
J. Tagami
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate school, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
- Center of Excellence Program for Frontier Research on Molecular Destruction and Reconstruction of Tooth and Bone, Tokyo Medical and Dental University, Tokyo 113-8549, Japan

Received 6 July 2007; received in revised form 28 August 2007; accepted 3 September 2007.

Abstract

Objective

The objective of our laboratory study was to determine the bonding efficacy of two-step self-etching primer system (Clearfil SE Bond), all-in-one adhesive (Clearfil Tri S Bond) and acid-etching system (Single Bond) to human fluorosed dentine.

Methods

Forty-eight human molars were grouped according to modified Thylstrup-Fejerskov index (TFI) into normal (N, TFI 0), mild fluorosis (ML, TFI 1–3) and moderate fluorosis (MD, TFI 4–6). Superficial dentine was exposed and ground with 600-grit silicon carbide paper. Teeth of each group were randomly divided into three sub-groups. Each sub-group was treated with one of the three bonding systems. A resin composite was built up on the bonded surfaces and stored in water at 37°C for 24h. They were serially sectioned in buccal-lingual direction into 0.7–1.0mm thick slabs. Slices were trimmed for microtensile bond test and stressed in tension at a crosshead speed of 1mm/min. The data were analyzed with two-way ANOVA (p=0.05). The adhesive/dentine interfaces of the bonded specimens were examined by a FE-SEM.

Results

Significantly higher microtensile bond strength (μTBS) was found with Clearfil SE Bond to mild fluorosed dentine than did Single Bond and Clearfil Tri S Bond. Lower μTBS were found for Single Bond (not significant) and Clearfil Tri S Bond than Clearfil SE Bond with moderately fluorosed dentine. Thickness of the hybrid layer produced by Clearfil SE Bond in mild and moderately fluorosed groups was less than with normal dentine.