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Related Experiment Videos

Marginal accuracy of temporary composite crowns.

A H Tjan1, A H Tjan, B E Grant

  • 1Department of Restorative Dentistry, Loma Linda University, School of Dentistry, Calif.

The Journal of Prosthetic Dentistry
|October 1, 1987
PubMed
Summary

This study compared four temporary crown materials. Protemp, Trim, and Provisional showed comparable accuracy, while Scutan had open margins, indicating poorer marginal adaptation.

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Area of Science:

  • Dental Materials Science
  • Prosthodontics

Background:

  • Accurate marginal adaptation of temporary crowns is crucial for maintaining tooth vitality and preventing secondary caries.
  • Several materials are available for fabricating temporary restorations, each with unique properties.

Purpose of the Study:

  • To quantitatively compare the marginal adaptation of temporary crowns fabricated from Protemp, Scutan, Provisional, and Trim materials using an in vitro model.

Main Methods:

  • A direct fabrication technique was employed to create temporary crowns on prepared teeth.
  • Impressions served as matrices for the direct fabrication process.
  • Marginal adaptation was quantitatively assessed for each material group.

Main Results:

  • Temporary crowns fabricated from Protemp, Trim, and Provisional materials demonstrated comparable marginal accuracy.
  • Temporary crowns made from Scutan material exhibited open margins, suggesting inferior marginal adaptation.

Conclusions:

  • Protemp, Trim, and Provisional are suitable materials for achieving accurate temporary crowns.
  • Scutan material may not provide adequate marginal seal for temporary restorations, potentially compromising clinical outcomes.

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