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Related Experiment Videos

Clinically versus laboratory photocured facings.

E Raviv1, M Zalkind, Z Yoeli

  • 1Hebrew University-Haddassah, School of Dental Medicine, Jerusalem, Israel.

The Journal of the Michigan Dental Association
|March 1, 1992
PubMed
Summary

Dental composite facings can fracture, but smooth surfaces are achievable. Polishing with sof-lex discs produced the best results, regardless of whether clinical or laboratory techniques were used for fabrication.

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Area of Science:

  • Dental Materials Science
  • Prosthodontics
  • Surface Engineering

Background:

  • Acrylic and composite resin facings are prone to fracture and detachment from metal frameworks.
  • Causes include insufficient retention, abrasion, and trauma.
  • Light-curing composite systems are used for fabricating dental facings.

Purpose of the Study:

  • To evaluate the effect of different polishing methods on the surface texture of composite resin facings.
  • To compare surface textures produced by clinical and laboratory fabrication techniques.

Main Methods:

  • Composite resin samples were fabricated using light-curing systems.
  • Finishing and polishing were performed using fine finishing diamonds, diamond burs, and sof-lex discs.
  • Scanning Electron Microscopy (SEM) was used to analyze surface texture.

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Main Results:

  • Sof-lex discs produced significantly smoother and more lustrous surfaces compared to other finishing instruments.
  • Little difference in surface texture was observed between clinical and laboratory techniques when using the same finishing instruments.

Conclusions:

  • Finishing discs are effective in achieving smooth and lustrous surfaces on composite resin dental facings.
  • The choice of polishing instrument is more critical than the fabrication technique (clinical vs. laboratory) for surface quality.