Evaluation of Degree of Conversion, Resin-Dentin Bond Strength, and Durability of Polydopamine Incorporated Total Etch Adhesive System

  • Vandhana James Department of Conservative Dentistry and Endodontics, Tagore Dental College Melakkottaiyur Post, Rathinamangalam, Tamil Nadu, India
  • Manavalan Madhana Madhubala Mail Department of Conservative Dentistry and Endodontics, SRM Dental College, Ramapuram, Chennai, Tamil Nadu, India
  • Shari S Devarajan Department of Conservative Dentistry and Endodontics, SRM Dental College, Ramapuram, Chennai, Tamil Nadu, India
  • Sekar Mahalaxmi Department of Conservative Dentistry and Endodontics, SRM Dental College, Ramapuram, Chennai, Tamil Nadu, India
  • Shanmugasundaram Sathyakumar Thanam Nagar, Mugalivakkam, Chennai, Tamil Nadu, India
Keywords:
Polydopamine, 3M Single Bond Dental Adhesive, Dental Etching, Polymerization, Dental Bonding

Abstract

Objectives: This study aimed to evaluate the degree of conversion (DC%), shear bond strength (SBS), bond durability, and the resin-dentin interface of polydopamine (PDA) incorporated total-etch adhesive system.
Materials and Methods: Five percentage by weight (wt%) concentration of PDA incorporated adhesive was prepared and its polymerization was evaluated using Fourier-transform infrared spectroscopy. The results were compared with the DC% of conventional total-etch adhesive (Adper Single Bond 2) using independent t-test. Occlusal surfaces of 80 freshly extracted human premolars were sectioned to expose the dentin, which was acid-etched. The samples were divided into two groups (n=40) of total-etch adhesive and total-etch adhesive+PDA. Composite resin blocks were built up over the bonded surface and cured. Each group was subdivided into two subgroups (n=20) of immediate and post-aging evaluation. Samples were immersed in 10% sodium hypochlorite for five hours, and then, the SBS was evaluated using a universal testing machine at a crosshead speed of 1 mm/minute. The resin-dentin interface was evaluated using confocal laser scanning microscopy. Data were analyzed using two-way analysis of variance and post-hoc Bonferroni test.
Results: DC% was not affected by the addition of 5% PDA to the adhesive (group 2). The SBS of group 2A was significantly higher than that of group 1A. There was no significant reduction of SBS in group 2B. The hybrid layer was less degraded after aging in group 2B compared to group 2A.
Conclusions: PDA incorporated adhesive increased the immediate bond strength and durability without changing the DC%.

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Published
2021-01-06
How to Cite
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James V, Madhubala M, Devarajan S, Mahalaxmi S, Sathyakumar S. Evaluation of Degree of Conversion, Resin-Dentin Bond Strength, and Durability of Polydopamine Incorporated Total Etch Adhesive System. Front Dent. 17.
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