Resin adhesion to caries-affected dentine after different removal methods.
BACKGROUND
Caries-affected dentine is the common bonding substrate when treating a patient. At present, there are many methods used for caries removal. The aim of this study was to evaluate the microtensile bond strength of two adhesives (Clearfil Protect Bond and OptiBond Solo Plus Total-Etch) to caries-affected dentine after three different caries removal methods.


METHODS
Extracted carious human third molars were used and caries-affected dentine surfaces were obtained from one of the three removal methods: (i) round steel bur in a slow-speed handpiece; (ii) Er:YAG laser; or (iii) 600-grit silicon carbide abrasive paper. Each of the adhesives was used to bond resin composite to the caries-affected dentine according to the manufacturers' instructions. Hourglass-shaped specimens were prepared and stressed in tension at 1mm/min. Data were analysed using two-way analysis of variance and least significant difference test.


RESULTS
Clearfil Protect Bond showed significantly lower bond strength than OptiBond Solo Plus Total-Etch after caries removal with round steel bur, but the opposite was found for specimens treated with silicon carbide abrasive paper. For laser-treated dentine, no significant differences between the adhesives were revealed.


CONCLUSIONS
Besides the differences in adhesives, different caries removal methods seem to influence resin adhesion to caries-affected dentine.
Sattabanasuk
V
V
Department of Conservative Dentistry and Prosthodontics, Srinakharinwirot University, Bangkok, Thailand. mengvanthana@hotmail.com
Burrow
M F
MF
Shimada
Y
Y
Tagami
J
J
D000704:Analysis of Variance; D016009:Chi-Square Distribution; D003731:Dental Caries / Q000628:therapy*; D003804:Dentin / Q000737:chemistry*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D053685:Laser Therapy; D008689:Methacrylates / Q000737:chemistry*; D018709:Statistics, Nonparametric; D019246:Tooth Preparation / Q000379:methods*
C503075:Clearfil Protect Bond; D017220:Dentin-Bonding Agents; D008689:Methacrylates; C500960:OptiBond Solo Plus Self-Etch