A Comparison of Bond Strength of Three Types of Acrylic, Composite, and Nanocomposite Artificial Teeth to Heat-cured Acrylic Denture Base Resin

  • Tahereh Ghaffari Gharebagh Associated prof. Department of the Dental Faculty of Tabriz University of Medical Sciences –Tabriz-Iran
  • Fahimeh Hamedirad department of prosthtodontics of dental faculty of Babol medicine science university
  • Keyvan Miruzadeh dentist
Keywords: Heat-cured denture base resin, Shear bond strength, Artificial teeth

Abstract

Objectives: Considering the use of artificial teeth for edentulous patients, it is essential to improve denture quality. The present study was performed to evaluate the bond strength of heat-cured denture base resins to newly designed Iranian artificial acrylic teeth.

Methods: In this in vitro experimental study, the shear bond strength of three types of teeth, including Ivoclar acrylic, Apple composite, and B-Star nanocomposite teeth, to heat-cured acrylic resin denture base resins was compared. A total of 18 samples were selected from each group. According to ISO 3336 standards, the samples were attached to heat-cured resins. For the assessment of bond strength, the samples were placed in a universal testing machine and subjected to shear forces at a speed of 1 mm/min; then, the fracture load was recorded. Descriptive statistics, including frequency, mean, and standard deviation, were calculated using SPSS version 20. Two-way ANOVA test was also used to compare shear bond strength between two groups (with and without monomers) and three types of artificial teeth.

Results: The mean shear bond strengths of Ivoclar acrylic teeth were 392.22 and 337.11 with and without adding monomers to the tooth surface, respectively. On the other hand, the mean shear bond strengths were 250.44 and 238.33 (without monomers) and 438.33 and 311.55 (with monomers) for the Apple composite and B-Star nanocomposite artificial teeth, respectively.

Conclusion: The greatest shear bond strength was attributed to Ivoclar acrylic teeth, followed by Apple composite and B-Star nanocomposite artificial teeth, respectively. Addition of monomers to the tooth surface significantly strengthened the shear bonding of acrylic base resin to teeth.

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Published
2019-01-30
How to Cite
1.
Ghaffari Gharebagh T, Hamedirad F, Miruzadeh K. A Comparison of Bond Strength of Three Types of Acrylic, Composite, and Nanocomposite Artificial Teeth to Heat-cured Acrylic Denture Base Resin. Front Dent. :Uncorrected Proof.
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Original Article