Document Type


Date of Degree

Summer 2009

Degree Name

MS (Master of Science)

Degree In

Operative Dentistry

First Advisor

Steven R. Armstrong

First Committee Member

Saulo Geraldeli

Second Committee Member

Marcela Hernandez

Third Committee Member

Justine Kolker

Fourth Committee Member

Fang Qian


Ethanol‐wet bonding (EW) has been proved to effectively infiltrate hydrophobic monomers into the demineralized hydrophilic dentin matrix and create a more degradation‐resistant network when bonding to normal dentin. Caries-affected dentin (CAD) has consistently demonstrated lower bond strength than normal dentin.

Objective: To evaluate effect of EW on resin-CAD bond strength.

Methods: Seventy five human molars with occlusal caries were randomly divided into water-wet (WW) and EW groups. CAD was obtained using the combined criteria of visual examination, surface hardness to an excavator and carbide bur and staining with 1% acid red in propylene glycol dye solution (Caries detector, Kuraray). For EW, the etched and water rinsed dentin was subsequently rinsed with absolute ethanol for 15s x3 before primer application. Four bonding agents, Bis-GMA/TEGDMA (ER2), Bis-GMA/HEMA (ER3), Bis-GMA/2-MP/HEMA (ER5), and Adper Scotchbond Multi Purpose (SBMP) were applied followed by resin-based composite (Heliomolar, Ivoclar Vivadent) incrementally built-up. Specimens (549) with a square cross-sectional area of approximately 0.7 mm2 were formed. Specimens (one day: 263; 6 month: 276) were subjected to micro-tensile bond test. Data were analyzed by one two-way and three-way ANOVA, two-sample t-test, and the parametric Weibull regression models.

Result: There was a significant difference in the mean microtensile bond strength between WW and EW substrate condition for ER2 (p=0.0443). The mean microtensile bond strength with EW was significantly greater.

Conclusion: Unlike prior research using normal dentin, EW bonding had significant effect only on 6 month bond strength to CAD for ER2.


bonding, caries, dentin


vii, 79 pages


Includes bibliographical references (pages 71-79).


Copyright 2009 Tipapat Attathom