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Related Experiment Video

Updated: Mar 15, 2026

Measuring the Complete-arch Distortion of an Optical Dental Impression
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Time efficiency, difficulty, and operator's preference comparing digital and conventional implant impressions: a

Tim Joda1, Patrik Lenherr2, Philipp Dedem2

  • 1Department of Reconstructive Dentistry & Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.

Clinical Oral Implants Research
|September 7, 2016
PubMed
Summary

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Intraoral scanning (IOS) is faster and preferred over conventional impressions for single implant sites. This digital method demonstrated higher efficiency and acceptance among dental professionals and students in a simulated environment.

Area of Science:

  • Dental Technology
  • Prosthodontics
  • Digital Dentistry

Background:

  • Accurate dental impressions are crucial for fabricating prosthetics, especially single-implant restorations.
  • Traditional impression techniques can be time-consuming and may present challenges in terms of accuracy and patient comfort.
  • Intraoral scanning (IOS) offers a digital alternative for capturing dental anatomy, potentially improving efficiency and precision.

Purpose of the Study:

  • To compare the time efficiency, perceived difficulty, and operator preference between intraoral scanning (IOS) and conventional impression techniques for single implant restorations.
  • To evaluate the influence of operator experience on the outcomes of digital versus conventional impression methods.
  • To assess the overall acceptance and effectiveness of IOS compared to traditional methods in a standardized setting.
Keywords:
dental implantdigital impressionintraoral scanoperator preferenceprosthodonticsrandomized controlled trial (RCT)time efficiency

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Main Methods:

  • A randomized controlled trial involving 100 participants with varying dental experience levels.
  • Participants were assigned to perform either digital scanning (IOS) or conventional impression first, followed by the other method consecutively on a standardized maxillary model with a single implant.
  • Outcome measures included working time, perceived difficulty, applicability, and subjective preferences, analyzed using statistical tests like Wilcoxon-Mann-Whitney and Kruskal-Wallis.

Main Results:

  • Intraoral scanning (IOS) was significantly more time-efficient, with mean work times ranging from 4.53 ± 1.34 min (dentists) to 5.01 ± 1.56 min (students), compared to conventional impressions (10.09 ± 1.15 min to 12.03 ± 2.00 min).
  • IOS was perceived as less difficult and more applicable than conventional impressions.
  • A majority of students (88%) and dentists (64%) rated IOS effectiveness higher; 76% of students preferred IOS, while 48% of dentists favored conventional impressions.

Conclusions:

  • For single-implant impressions under optimal, standardized conditions, quadrant-like intraoral scanning (IOS) is more time-efficient than conventional full-arch impression techniques.
  • IOS demonstrated a high level of acceptance among both students and dentists, indicating its potential as a valuable tool in modern restorative dentistry.
  • The study highlights the advantages of digital impression techniques in terms of efficiency and operator perception, supporting their integration into clinical practice.