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Do denture processing techniques affect the mechanical properties of denture teeth?

Jody L Clements1, Daranee Tantbirojn2, Antheunis Versluis3

  • 1Resident, Advanced Prosthodontics Program, University of Tennessee Health Science Center, Memphis, Tenn.

The Journal of Prosthetic Dentistry
|March 20, 2018
PubMed
Summary
This summary is machine-generated.

The injection-molded technique enhances the strength of nanohybrid composite (NHC) and interpenetrating network (IPN) denture teeth, improving their longevity. Compression molding did not significantly alter the mechanical properties of these dental materials.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Dental Prosthetics

Background:

  • Denture tooth fracture can compromise the durability of dental prostheses.
  • The impact of denture processing techniques on the mechanical strength of denture tooth materials remains incompletely understood.

Purpose of the Study:

  • To evaluate how different denture processing techniques influence the mechanical properties of various denture tooth materials.

Main Methods:

  • Three types of denture teeth—nanohybrid composite (NHC), interpenetrating network (IPN), and microfiller-reinforced polyacrylic (MRP)—were processed using injection molding and compression molding techniques.
  • Unprocessed teeth served as controls.
  • Mechanical properties, including elastic modulus and maximum stress, were assessed using three-point bend tests and analyzed with two-way ANOVA.

Main Results:

  • Both processing technique and material type significantly affected elastic modulus and maximum stress.
  • Injection molding yielded higher elastic modulus for NHC and IPN, and increased maximum stress for IPN and MRP.
  • MRP exhibited the highest elastic modulus but lowest maximum stress, while IPN showed the lowest elastic modulus but high maximum stress.

Conclusions:

  • The injection-molded technique significantly enhances the elastic modulus of NHC and IPN denture teeth and the maximum stress of IPN teeth.
  • Compression molding did not yield significant improvements in the mechanical properties of the tested denture tooth materials.