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Summary
This summary is machine-generated.

This study investigated factors influencing microtensile bond strength (µTBS) in dental adhesives. Tooth variability and dentin characteristics significantly impact bond strength, highlighting the need to account for these in adhesive performance evaluations.

Keywords:
adhesive dentistryadhesivesdentinmicro-tensileresinsstatistical data analysis

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Adhesion Science

Background:

  • Microtensile bond strength (µTBS) is a critical measure for dental adhesive performance.
  • Understanding factors influencing µTBS variability is essential for accurate material evaluation.
  • Nondestructive testing methods offer potential for quantifying specimen characteristics influencing bond strength.

Purpose of the Study:

  • To clarify the interrelationship of factors affecting microtensile bond strength (µTBS) values.
  • To evaluate the influence of specimen characteristics on µTBS using nondestructive testing.
  • To identify key parameters that correlate with and affect bond strength in dental restorations.

Main Methods:

  • Prepared µTBS specimens from 10 human molars.
  • Evaluated six factors: voids, resin/dentin X-ray absorption, dentin length, adhesion area, and tooth variability.
  • Utilized optical coherence tomography and micro-computed tomography for nondestructive analysis.
  • Analyzed µTBS data using general linear, linear mixed effects, and nonlinear regression models.

Main Results:

  • Significant impact of individual tooth differences on µTBS (P < 0.001).
  • Positive correlation between µTBS and dentin length (P < 0.001).
  • Negative correlation between µTBS and adhesion area size (P = 0.001), with nonlinearity.
  • Positive correlation between µTBS and dentin X-ray absorption coefficient (P = 0.022), with nonlinearity.
  • Significant difference in µTBS based on the presence/absence of voids.

Conclusions:

  • Tooth variability and specimen characteristics significantly influence dental adhesive bond strength.
  • Dentin length and X-ray absorption coefficient correlate positively with µTBS.
  • Adhesion area size negatively correlates with µTBS.
  • Accurate adhesive performance evaluation requires consideration of tooth variability and methods to reduce bond strength variations.