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Related Experiment Videos

Selected variables in bonding to dentin.

S Uno1, E Asmussen

  • 1School of Dentistry, Hokkaido University, Sapporo, Japan.

Scandinavian Journal of Dental Research
|April 1, 1992
PubMed
Summary

Material thickness and light guide distance significantly impact composite resin bond strength to dentin. Irradiation time had minimal effect, suggesting light transmission is key for dental bonding.

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Area of Science:

  • Dental Materials Science
  • Adhesive Dentistry
  • Biomaterials

Background:

  • Achieving optimal shear bond strength between composite resins and dentin is crucial for durable dental restorations.
  • The simplified Gluma system is used for dentin treatment, but its effectiveness can be influenced by various factors.
  • Understanding these factors is essential for improving clinical success rates.

Purpose of the Study:

  • To investigate the influence of material thickness, light guide distance, and irradiation time on the shear bond strength of composite resin to Gluma-treated dentin.
  • To determine which of these variables have a significant impact on bond strength.
  • To provide insights into optimizing light curing protocols for enhanced adhesion.

Main Methods:

  • Experimental study design involving composite resin bonded to dentin treated with a simplified Gluma system.
  • Variables tested included material thickness (2 or 3 mm), light guide distance (0, 1, 3, 5 mm), and irradiation time (10, 20, 40, 60 s).
  • Shear bond strength was measured to quantify the adhesive performance under different conditions.

Main Results:

  • Both material thickness and the distance between the light guide and the composite resin surface significantly affected shear bond strength.
  • Irradiation time showed minimal influence on bond strength within the tested range.
  • A trend suggests that greater light transmission through the composite is associated with higher bond strength.

Conclusions:

  • Material thickness and light guide distance are critical factors influencing the shear bond strength of composite resins to dentin using the Gluma system.
  • Optimizing light curing parameters, particularly minimizing distance and considering thickness, is essential for maximizing bond strength.
  • Further research should focus on the relationship between light transmission and bond strength for improved clinical application.

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