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Related Experiment Videos

A new technique for determining the denture tooth bond

J L Cunningham1, I C Benington

  • 1Department of Restorative Dentistry, School of Clinical Dentistry, Queen's University of Belfast, U.K.

Journal of Oral Rehabilitation
|March 1, 1996
PubMed
Summary

Denture tooth bond failures are common. Ineffectual wax elimination, not tooth contamination, is the primary cause of weak denture tooth to acrylic resin bonds.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Prosthodontics

Background:

  • Defective bonds between artificial denture teeth and the denture base material are a frequent cause of denture failure.
  • Existing research on this topic is limited and fragmented due to diverse experimental methodologies and varying international standards for specimen preparation and testing.

Purpose of the Study:

  • To critically evaluate current standards for testing denture tooth to acrylic resin bond strength.
  • To introduce and validate a novel procedure for assessing the bond strength between denture teeth and acrylic resin.

Main Methods:

  • A critical review of existing national and international standard specifications for denture tooth-resin bonding was performed.
  • A new standardized methodology for determining denture tooth to acrylic resin bond strength was developed and implemented.
  • The influence of physical tooth modification and alginate contamination on bond strength was investigated using the new technique.

Main Results:

  • The novel procedure provided a consistent method for evaluating denture tooth-acrylic resin bond strength.
  • Physical modification of the denture tooth surface did not significantly impact bond strength.
  • Alginate contamination of the tooth surface also showed no significant detrimental effect on the bond strength.
  • The primary mode of bond failure identified was ineffectual wax elimination during denture fabrication.

Conclusions:

  • Ineffectual wax elimination is the critical factor leading to bond failures between denture teeth and acrylic resin bases.
  • The newly developed procedure offers a reliable method for assessing denture tooth-resin bond strength, addressing limitations of previous standards.
  • Further research should focus on optimizing wax elimination techniques to improve denture longevity and reduce failure rates.

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