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Related Experiment Videos

4-META polymethyl methacrylate shear bond strength to titanium

K B May1, M C Van Putten, D A Bow

  • 1University of Michigan, School of Dentistry, Department of Prosthodontics, Ann Arbor 48109-1078, USA.

Operative Dentistry
|January 1, 1997
PubMed
Summary

Alumina abrasive pretreatment significantly improves the bond strength of denture base materials to titanium substructures. This enhancement is crucial for durable fixed complete arch prostheses, improving dental restoration longevity.

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Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Surface Engineering

Background:

  • Machined titanium substructures are used in fixed complete arch prostheses.
  • Enhancing acrylic bonding to titanium is critical due to limitations in traditional mechanical retention methods.
  • Silane and surface abrasives are common pretreatments for improved retention.

Purpose of the Study:

  • To evaluate the bond strength between a metal bonding denture base material and machined titanium.
  • To determine the efficacy of alumina abrasive pretreatment on this bond strength.

Main Methods:

  • Fifteen Grade 2 titanium rods were prepared and divided into control (no pretreatment) and experimental (110-micron alumina abrasive pretreatment) groups.
  • Heat-cured polymethyl methacrylate was processed around the titanium rods.

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  • A Shell-Nielsen shear test was conducted at a crosshead speed of 0.5 mm/minute to measure bond strength.

    • Main Results:

    • The experimental group, pretreated with alumina abrasive, showed a mean bond strength 3.7 times greater than the control group.
    • The difference in bond strength was statistically significant (P = 0.0001, ANOVA).

    Conclusions:

    • Pretreatment with 110-micron alumina air abrasive significantly enhances the bond strength of heat-cured metal bonding polymethyl methacrylate to titanium.
    • This surface modification technique offers a promising method for improving the durability of titanium-based dental prostheses.