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The microtensile bond test: a review.

D H Pashley1, R M Carvalho, H Sano

  • 1Dept. of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, Georgia 30912-1129, USA. dpashley@mail.mcg.edu

The Journal of Adhesive Dentistry
|December 1, 2001
PubMed
Summary

The microtensile bond test offers versatile methods for assessing dental material adhesion. This review details its modifications, aiding researchers in selecting optimal techniques for bond strength evaluation.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Adhesion Science

Background:

  • Conventional bond tests have limitations in assessing adhesion at clinically relevant sites.
  • The microtensile bond test has emerged as a valuable technique for evaluating resin-tooth interfacial strength.

Purpose of the Study:

  • To comprehensively review and describe various modifications of the microtensile bond test.
  • To provide investigators with guidance for selecting the most suitable microtensile bond test modification for their research needs.

Main Methods:

  • The core of the microtensile test involves sectioning resin-bonded teeth into thin slabs (0.5–1.0 mm).
  • Specimens are trimmed to concentrate tensile force on the bonded interface during testing.
  • This method allows for multiple specimens per tooth and eliminates the need for a matrix to define bonded surface area.

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Main Results:

  • Microtensile bond testing has been used to measure regional bond strength variations in dentin (occlusal, root surfaces, root canals).
  • It effectively compares bond strengths between normal and affected dentin (caries, sclerotic).
  • The technique is highly suitable for assessing the long-term durability of resin-hard tissue bonds.

Conclusions:

  • Microtensile bond test methods provide unparalleled versatility compared to conventional approaches.
  • While more labor-intensive, these methods offer significant potential for understanding restorative material adhesion in clinical contexts.