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Self-etch vs etch-and-rinse adhesives: effect of thermo-mechanical fatigue loading on marginal quality of bonded resin composite restorations.
Dent Mater. 2005 May; 21(5):397-412.DM

Abstract

OBJECTIVE

This study evaluated the marginal integrity of dentine adhesives bonded to enamel and dentine, before and after thermo-mechanical loading (TML).

METHODS

MO cavities with proximal boxes beneath the CEJ were prepared in extracted human third molars. Direct resin composite restorations (Tetric Ceram) were bonded with 3-step etch-and-rinse (Syntac Classic, Solobond Plus, OptiBond FL), 2-step etch-and-rinse (Admira Bond, Single Bond), 2-step self-etch (AdheSE, Clearfil SE Bond), and 1-step self-etch (all-in-one) adhesives (Adper Prompt, Xeno III, iBond). Marginal gaps were analyzed using SEM of epoxy resin replicas. Bonded interfaces before TML were examined with TEM to identify pre-existing attributes for subsequent marginal disintegration.

RESULTS

In enamel, high percentages of gap-free margins were initially identified for all adhesives. After TML, etch-and-rinse adhesives exhibited significantly higher percentages of gap-free margins (approximately 90%) compared with two-step self-etch (approximately 75%) and all-in-one (approximately 55%) adhesives (p<0.05). iBond did not completely etch through the enamel smear layer. In dentine, 89-100% gap-free margins were initially observed. After TML, there were no statistical differences among etch-and-rinse (62-70%) and two-step self-etch (62-63%) adhesives (p>0.05). The all-in-one adhesives exhibited significantly less gap-free margins (<40%) in dentine (p<0.05), with iBond showing the worst marginal integrity (15%). The presence of pre-existing water channels within the adhesives probably expedited water sorption when restorations were under functional stresses.

CONCLUSION

Enamel bonding was more effective with phosphoric acid-etching. Etch-and-rinse and 2-step self-etch adhesives showed promising marginal adaptation to dentine and may have a better clinical prognosis than the all-in-one bonding approach.

Authors+Show Affiliations

Dental Clinic I Operative Dentistry and Periodontology, University of Erlangen-Nuremberg, Glückstrasse 11, D-91054 Erlangen, Germany. frankbg@dent.uni-erlangen.deNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

15826696

Citation

Frankenberger, Roland, and Franklin R. Tay. "Self-etch Vs Etch-and-rinse Adhesives: Effect of Thermo-mechanical Fatigue Loading On Marginal Quality of Bonded Resin Composite Restorations." Dental Materials : Official Publication of the Academy of Dental Materials, vol. 21, no. 5, 2005, pp. 397-412.
Frankenberger R, Tay FR. Self-etch vs etch-and-rinse adhesives: effect of thermo-mechanical fatigue loading on marginal quality of bonded resin composite restorations. Dent Mater. 2005;21(5):397-412.
Frankenberger, R., & Tay, F. R. (2005). Self-etch vs etch-and-rinse adhesives: effect of thermo-mechanical fatigue loading on marginal quality of bonded resin composite restorations. Dental Materials : Official Publication of the Academy of Dental Materials, 21(5), 397-412.
Frankenberger R, Tay FR. Self-etch Vs Etch-and-rinse Adhesives: Effect of Thermo-mechanical Fatigue Loading On Marginal Quality of Bonded Resin Composite Restorations. Dent Mater. 2005;21(5):397-412. PubMed PMID: 15826696.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Self-etch vs etch-and-rinse adhesives: effect of thermo-mechanical fatigue loading on marginal quality of bonded resin composite restorations. AU - Frankenberger,Roland, AU - Tay,Franklin R, PY - 2004/01/19/received PY - 2004/05/13/revised PY - 2004/07/13/accepted PY - 2005/4/14/pubmed PY - 2005/7/27/medline PY - 2005/4/14/entrez SP - 397 EP - 412 JF - Dental materials : official publication of the Academy of Dental Materials JO - Dent Mater VL - 21 IS - 5 N2 - OBJECTIVE: This study evaluated the marginal integrity of dentine adhesives bonded to enamel and dentine, before and after thermo-mechanical loading (TML). METHODS: MO cavities with proximal boxes beneath the CEJ were prepared in extracted human third molars. Direct resin composite restorations (Tetric Ceram) were bonded with 3-step etch-and-rinse (Syntac Classic, Solobond Plus, OptiBond FL), 2-step etch-and-rinse (Admira Bond, Single Bond), 2-step self-etch (AdheSE, Clearfil SE Bond), and 1-step self-etch (all-in-one) adhesives (Adper Prompt, Xeno III, iBond). Marginal gaps were analyzed using SEM of epoxy resin replicas. Bonded interfaces before TML were examined with TEM to identify pre-existing attributes for subsequent marginal disintegration. RESULTS: In enamel, high percentages of gap-free margins were initially identified for all adhesives. After TML, etch-and-rinse adhesives exhibited significantly higher percentages of gap-free margins (approximately 90%) compared with two-step self-etch (approximately 75%) and all-in-one (approximately 55%) adhesives (p<0.05). iBond did not completely etch through the enamel smear layer. In dentine, 89-100% gap-free margins were initially observed. After TML, there were no statistical differences among etch-and-rinse (62-70%) and two-step self-etch (62-63%) adhesives (p>0.05). The all-in-one adhesives exhibited significantly less gap-free margins (<40%) in dentine (p<0.05), with iBond showing the worst marginal integrity (15%). The presence of pre-existing water channels within the adhesives probably expedited water sorption when restorations were under functional stresses. CONCLUSION: Enamel bonding was more effective with phosphoric acid-etching. Etch-and-rinse and 2-step self-etch adhesives showed promising marginal adaptation to dentine and may have a better clinical prognosis than the all-in-one bonding approach. SN - 0109-5641 UR - https://www.unboundmedicine.com/medline/citation/15826696/Self_etch_vs_etch_and_rinse_adhesives:_effect_of_thermo_mechanical_fatigue_loading_on_marginal_quality_of_bonded_resin_composite_restorations_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0109-5641(04)00124-1 DB - PRIME DP - Unbound Medicine ER -