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One-step self-etch adhesive bonding to pre-etched primary and permanent enamel
Tathiane Larissa Lenzi1, Camila de Almeida Brandão Guglielmi, Cristiane Balvedi Umakoshi
1Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Journal of Dentistry for Children (Chicago, Ill.)
|September 10, 2013
Summary
Pre-etching primary and permanent teeth enamel with phosphoric acid significantly boosts the bond strength of 1-step self-etch adhesive systems. This simple step enhances bonding effectiveness for dental restorations.
Area of Science:
- Dental materials science
- Adhesive dentistry
- Enamel bonding
Background:
- 1-step self-etch adhesive systems offer simplified clinical application.
- Enamel conditioning is crucial for optimal adhesion in restorative dentistry.
- Understanding factors influencing bond strength in primary versus permanent teeth is essential.
Purpose of the Study:
- To investigate the impact of phosphoric acid pre-etching on the bond strength of a 1-step self-etch adhesive.
- To compare the bond strength in primary and permanent teeth.
- To determine if pre-etching improves adhesion regardless of tooth type.
Main Methods:
- Microshear bond strength testing was performed on 60 molars (30 primary, 30 permanent).
- Teeth were divided into groups with and without phosphoric acid pre-etching before applying a 1-step self-etch adhesive.
- Bonded composite resin specimens were tested after 24-hour water storage at 37°C.
Main Results:
- Permanent teeth exhibited significantly higher enamel bond strength than primary teeth.
- Pre-etching enamel with phosphoric acid resulted in higher microshear bond strength values.
- Adhesive or mixed failures were the predominant failure modes across all groups.
Conclusions:
- Preliminary enamel etching with phosphoric acid enhances the bonding effectiveness of 1-step self-etch adhesive systems.
- This improvement in bond strength is consistent for both primary and permanent teeth.
- Pre-etching is a valuable adjunctive technique for improving adhesion with 1-step self-etch systems.
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