Micro-Shear Bond Strength of Scotchbond Universal Adhesive to Primary and Permanent Dentin: A Six-Month in Vitro Study.

  • Masoud Fallahinejad Ghajari Professor of Pediatric Dentistry, Dental Research Center, Research Institute Of Dental Siences, Department 0f Pediatric Dentistry, School Of Dentistry, Shahid Beheshti University Of Medical Sciences, Tehran Iran
  • Amir Ghassemi Professor of Reparative Dentistry, Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
  • Mohammadreza Badiee Dentofacial Deformities Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
  • Zahra Abdolazimi Assistant Professor of Pediatric Dentistry, Pediatric Department, Dental School, Semnan University of Medical Sciences, Semnan, Iran.
  • Alireza Akbarzadeh Baghban PhD in Biostatistics, Associate Professor, Proteomics Research Center, Department of Basic Sciences, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Keywords: Shear bond strength, Scotchbond, Dentin, Bonding Agents


Objectives: This study aimed to assess the micro-shear bond strength of Scotchbond Universal adhesive used in self-etch and etch and rinse modes to primary and permanent dentin at 24 hours and six months.

Material and Methods: This study was conducted on 88 composite micro-cylinders that were divided into eight groups (n=11) as follows: (A) Etch and rinse, 24 hours, primary dentin; (B) Self-etch, 24 hours, primary dentin; (C) Etch and rinse, 6 months, primary dentin; (D) Self-etch, 6 months, primary dentin; (E) Etch and rinse, 24 hours, permanent dentin; (F) Self-etch, 24 hours, permanent dentin; (G) Etch and rinse, 6 months, permanent dentin; (H) Self-etch, 6 months, permanent dentin. The micro-shear bond strength was measured by a testing machine at a crosshead speed of 0.5 mm/minute. Data were analyzed using three-way ANOVA.

Results: The mean micro-shear bond strength was 12.3±2.3 MPa in A, 18.8±4.1 MPa in B, 11.9±3.7 MPa in C, 16±2.9 MPa in D, 19.1±2.7 MPa in E, 22.8±4.1 MPa in F, 16.2±2.6 MPa in G and 17.2±4.4 MPa in H. In self-etch mode, the micro-shear bond strength was significantly higher than that in etch and rinse mode (P<0.001). The micro-shear bond strength in permanent teeth was significantly higher than in primary teeth (P<0.001). At six months, the micro-shear bond strength significantly decreased in all groups (P<0.001).

Conclusion: The micro-shear bond strength of Scotchbond Universal adhesive depended on the type of tooth and mode of application of adhesive and decreased with time.


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How to Cite
Fallahinejad Ghajari M, Ghassemi A, Badiee M, Abdolazimi Z, Akbarzadeh Baghban A. Micro-Shear Bond Strength of Scotchbond Universal Adhesive to Primary and Permanent Dentin: A Six-Month in Vitro Study. Front Dent. :Uncorrected Proof.
Original Article