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  1. Home
  3. Traditional Alginate Impressions Vs Digital Optical Impressions Using Reverse-engineering Technology: A Comparative Study.
  1. Home
  3. Traditional Alginate Impressions Vs Digital Optical Impressions Using Reverse-engineering Technology: A Comparative Study.

Related Experiment Video

Measuring the Complete-arch Distortion of an Optical Dental Impression
06:51

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Traditional Alginate Impressions vs Digital Optical Impressions Using Reverse-Engineering Technology: A Comparative

Manlio Santilli, Gianmaria D'addazio, Bruna Sinjari

    The International Journal of Prosthodontics
    |May 19, 2025

    View abstract on PubMed

    Summary
    This summary is machine-generated.

    Digital impressions offer superior accuracy and precision compared to traditional alginate methods, even for inexperienced dental students. This study highlights the benefits of digital intraoral scanning for consistent clinical outcomes.

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    Area of Science:

    • Dental materials science
    • Digital dentistry
    • Biomedical engineering

    Background:

    • Traditional alginate impressions are prone to dimensional instability.
    • Digital intraoral scanning offers potential for improved accuracy and reproducibility.

    Purpose of the Study:

    • To compare the precision and accuracy of traditional alginate impressions versus digital optical impressions.
    • To evaluate these methods when performed by second-year dental students.

    Main Methods:

    • 128 impressions (64 alginate, 64 digital) were taken by 20 dental students.
    • Impressions were analyzed using reverse engineering software and compared to expert reference models.
    • 3D and point-by-point analyses assessed precision and accuracy.

    Main Results:

    • Digital impressions showed significantly smaller deviations from reference models.
    • Digital impressions demonstrated superior accuracy, precision, and trueness.
    • The null hypothesis of no significant difference was rejected (p < 0.05).

    Conclusions:

    • Digital impressions are more accurate and precise than alginate impressions, even with inexperienced operators.
    • Intraoral scanners enhance standardization and consistency in dental practice.
    • Integrating digital impression techniques in dental education improves proficiency and outcomes.