Self-etch and etch-and-rinse adhesive systems in clinical dentistry

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Restorative Dentistry

Background:

• Current dental adhesive systems utilize either etch-and-rinse or self-etch approaches.
• These systems differ in their interaction mechanisms with natural tooth structures like enamel and dentin.
• Both methods aim to create a hybrid layer for resin impregnation.

Purpose of the Study:

• To compare the efficacy and application of etch-and-rinse and self-etch dental adhesive systems.
• To elucidate the optimal use cases for each adhesive system based on tooth substrate and restoration type.

Main Methods:

• Review of current literature on etch-and-rinse and self-etch adhesive systems.
• Analysis of the chemical interactions and structural outcomes of each system on enamel and dentin.
• Evaluation of bond strengths and clinical predictability based on existing evidence.

Main Results:

• Etch-and-rinse systems use phosphoric acid for pretreatment, creating a pronounced etch pattern on enamel.
• Self-etch systems use acidic monomers for simultaneous etching and priming, offering superior bond strength to dentin.
• Multi-step systems generally show higher bond strengths and predictability than one-step systems.

Conclusions:

• The choice between etch-and-rinse and self-etch systems often depends on clinical preference and specific application.
• Etch-and-rinse systems are preferred for indirect restorations and enamel-dominant preparations.
• Self-etch systems are recommended for direct composite restorations, particularly when dentin provides primary support.