DOI: 10.4103/sjoralsci.sjoralsci_107_25 ISSN: 2542-7849

Comparative evaluation of enamel bond strength between self-etch and total-etch adhesives on cut and uncut enamel: An in vitro study

Sharvari Deshmukh, Arshia Baig, Lalit Pawar, Aniruddha Deshpande, Nikita Kale, Sumedha Thosar
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Abstract

Introduction:

Effective bonding to enamel is essential for the long-term success of adhesive restorative procedures. While total-etch adhesive systems are traditionally regarded as reliable for enamel bonding, self-etch systems have gained popularity due to their simplified clinical application. The influence of enamel surface characteristics, particularly whether enamel is cut or left uncut, remains clinically relevant.

Aim:

The aim of this study was to evaluate and compare the enamel bond strength of a self-etch adhesive (Adper™ Easy One, 3M ESPE) and a total-etch adhesive (Single Bond™, 3M ESPE) on cut and uncut enamel surfaces under in vitro conditions.

Materials and Methods:

Forty extracted human permanent mandibular molars were randomly allocated into four groups ( n = 10) based on the condition of their enamel surfaces and the adhesive protocol used. Bonding was performed according to the manufacturer’s instructions, followed by composite resin buildup. Shear bond strength was measured using a universal testing machine. Statistical analysis was carried out using one-way analysis of variance and Student’s t -test ( P < 0.05).

Results and Discussion:

Single bond demonstrated significantly higher bond strength than Adper Easy One on both enamel surfaces. On uncut enamel, Adper Easy One showed lower bond strength (3.40 ± 0.843 MPa) compared to single bond (9.90 ± 2.885 MPa) ( P < 0.05). Cut enamel showed higher bond strength irrespective of the adhesive used.

Conclusion:

Within the limitations of this in vitro study, total-etch adhesives showed superior bonding to enamel. Enamel surface preparation significantly enhances bond strength.

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