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Keys to Predictable Digital Impressions.

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|March 11, 2022
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Summary
This summary is machine-generated.

Dental impressions using PVS and polyether materials are accurate, but many still have errors like voids or bubbles. Achieving an accurate final dental restoration requires careful technique beyond just material precision.

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Area of Science:

  • Dental materials science
  • Prosthodontics
  • Clinical dentistry

Background:

  • Polyvinyl siloxane (PVS) and polyether impression materials are considered the gold standard for dental replication.
  • Despite material accuracy, the impression process itself presents risks to the final outcome.
  • Numerous studies indicate frequent deficiencies in dental impressions submitted to laboratories.

Purpose of the Study:

  • To highlight the discrepancy between the inherent accuracy of dental impression materials and the prevalence of errors in clinical practice.
  • To emphasize that successful dental restorations depend on technique, not solely on material properties.

Main Methods:

  • Review of existing literature on dental impression accuracy and material properties.
  • Analysis of studies reporting deficiencies in PVS and polyether impressions.
  • Examination of common error types, such as voids, tears, and air bubbles at finish and margin lines.

Main Results:

  • PVS and polyether materials demonstrate high intrinsic accuracy.
  • A significant percentage of dental impressions exhibit critical deficiencies upon arrival at laboratories.
  • Common defects include voids/tears (50.7%) and air bubbles (40.4%) at critical areas.

Conclusions:

  • The accuracy of dental impressions is compromised by factors beyond material selection.
  • Technical execution during impression taking and model fabrication is crucial for predictable clinical outcomes.
  • Improving clinical techniques is essential to minimize impression errors and enhance the success of fixed partial denture (FPD) fabrication.