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The effect of thermocycling on the adhesion of self-etching adhesives on dental enamel and dentin.
J Contemp Dent Pract. 2007 Feb 01; 8(2):17-24.JC

Abstract

AIM

The aim of the present study was to investigate the effectiveness of one total-etch self-priming adhesive and two one-step self-etching adhesive systems on the adhesion of a resin composite to both dentin and enamel. The effect of thermocycling on the adhesion was also investigated. The null hypothesis tested was thermocycling would not affect bond strengths to enamel and dentin treated with self-etching adhesives or a total-etch adhesive.

METHODS AND MATERIALS

Two single-step self-etching adhesives [Xeno III (XE3) and Prompt L-Pop (PP)] and one two-step total-etch adhesive system (Prime & Bond NT) (P&B NT) were used in this study. Thirty caries-free unrestored human third molars were used to make specimens of enamel and dentin. Different adhesives were applied on enamel and dentin surfaces according to the manufacturer's instructions then hybrid composite restorative material was condensed on the surface using a mold. The bonded specimens were stored in distilled water at 37 masculineC for 24 hours before being tested. Half of the bonded specimens were tested for shear bond strength without thermocycling. The other half of the test specimens were thermocycled using a thermocycling apparatus in water baths held at 5 masculineC and 55 masculineC with a dwell time of one minute each for 10,000 cycles prior to shear testing. The mean shear bond strength before and after thermocycling was calculated, and the results were subjected to two-way analysis of variance (ANOVA) and repeated measure design to show the interaction between different materials and different times.

RESULTS

The results showed shear bond strength on both enamel and dentin of the total-etch adhesive and the self-etching adhesives decreased after the specimens were subjected to thermocycling.

CONCLUSIONS

The null hypothesis tested "thermocycling would not affect bond strengths treated with self-etching adhesives" was rejected. Furthermore, the study revealed the following: 1. The shear bond strength to both enamel and dentin of the total-etch adhesive and the self-etching adhesives decreased after the specimens were subjected to thermocycling. 2. XE3 achieved the highest bond strength to both enamel and dentin (26.994+/-1.17 and 25.22+/-1.26, respectively). 3. XE3 showed even better bonding after thermocycling to enamel and dentin than the total-etching system or PP. 4. Although PP bonded to enamel showed lower shear bond strength value than XE3, it has durable bond strength even after thermocycling.

Authors+Show Affiliations

Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.No affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17277823

Citation

El-Araby, Alaa Morsy, and Yousef F. Talic. "The Effect of Thermocycling On the Adhesion of Self-etching Adhesives On Dental Enamel and Dentin." The Journal of Contemporary Dental Practice, vol. 8, no. 2, 2007, pp. 17-24.
El-Araby AM, Talic YF. The effect of thermocycling on the adhesion of self-etching adhesives on dental enamel and dentin. J Contemp Dent Pract. 2007;8(2):17-24.
El-Araby, A. M., & Talic, Y. F. (2007). The effect of thermocycling on the adhesion of self-etching adhesives on dental enamel and dentin. The Journal of Contemporary Dental Practice, 8(2), 17-24.
El-Araby AM, Talic YF. The Effect of Thermocycling On the Adhesion of Self-etching Adhesives On Dental Enamel and Dentin. J Contemp Dent Pract. 2007 Feb 1;8(2):17-24. PubMed PMID: 17277823.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of thermocycling on the adhesion of self-etching adhesives on dental enamel and dentin. AU - El-Araby,Alaa Morsy, AU - Talic,Yousef F, Y1 - 2007/02/01/ PY - 2007/2/6/pubmed PY - 2007/2/22/medline PY - 2007/2/6/entrez SP - 17 EP - 24 JF - The journal of contemporary dental practice JO - J Contemp Dent Pract VL - 8 IS - 2 N2 - AIM: The aim of the present study was to investigate the effectiveness of one total-etch self-priming adhesive and two one-step self-etching adhesive systems on the adhesion of a resin composite to both dentin and enamel. The effect of thermocycling on the adhesion was also investigated. The null hypothesis tested was thermocycling would not affect bond strengths to enamel and dentin treated with self-etching adhesives or a total-etch adhesive. METHODS AND MATERIALS: Two single-step self-etching adhesives [Xeno III (XE3) and Prompt L-Pop (PP)] and one two-step total-etch adhesive system (Prime & Bond NT) (P&B NT) were used in this study. Thirty caries-free unrestored human third molars were used to make specimens of enamel and dentin. Different adhesives were applied on enamel and dentin surfaces according to the manufacturer's instructions then hybrid composite restorative material was condensed on the surface using a mold. The bonded specimens were stored in distilled water at 37 masculineC for 24 hours before being tested. Half of the bonded specimens were tested for shear bond strength without thermocycling. The other half of the test specimens were thermocycled using a thermocycling apparatus in water baths held at 5 masculineC and 55 masculineC with a dwell time of one minute each for 10,000 cycles prior to shear testing. The mean shear bond strength before and after thermocycling was calculated, and the results were subjected to two-way analysis of variance (ANOVA) and repeated measure design to show the interaction between different materials and different times. RESULTS: The results showed shear bond strength on both enamel and dentin of the total-etch adhesive and the self-etching adhesives decreased after the specimens were subjected to thermocycling. CONCLUSIONS: The null hypothesis tested "thermocycling would not affect bond strengths treated with self-etching adhesives" was rejected. Furthermore, the study revealed the following: 1. The shear bond strength to both enamel and dentin of the total-etch adhesive and the self-etching adhesives decreased after the specimens were subjected to thermocycling. 2. XE3 achieved the highest bond strength to both enamel and dentin (26.994+/-1.17 and 25.22+/-1.26, respectively). 3. XE3 showed even better bonding after thermocycling to enamel and dentin than the total-etching system or PP. 4. Although PP bonded to enamel showed lower shear bond strength value than XE3, it has durable bond strength even after thermocycling. SN - 1526-3711 UR - https://www.unboundmedicine.com/medline/citation/17277823/The_effect_of_thermocycling_on_the_adhesion_of_self_etching_adhesives_on_dental_enamel_and_dentin_ DB - PRIME DP - Unbound Medicine ER -