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  • Can digital impression methods eliminate the current problems of conventional impression techniques?

    Conventional impression materials remain a cornerstone of routine dental practice, yet they carry well-documented drawbacks, including a pronounced gag reflex, limited patient comfort, potential soft-tissue trauma, dimensional changes with temperature and elapsed time, the need for disinfection, cross-infection risk, and susceptibility to distortion during transport, storage, and laboratory handling. Digital impression systems have been introduced to overcome these limitations, and their use in dentistry—particularly in prosthodontics—continues to expand. This review compares conventional and digital impression techniques and examines whether digital workflows can resolve the shortcomings inherent to conventional methods. Conventional elastomers such as polyether and addition-type silicones offer excellent dimensional stability and detail reproduction and are currently regarded as the gold standard. Digital impressions, obtained with intraoral or extraoral scanners, provide clear advantages in patient comfort, procedure time, reduced cross-infection risk, elimination of polymerization shrinkage and gypsum expansion, and convenient digital archiving and transfer. However, their accuracy is influenced by scanning area, scanner sensitivity, operator experience, moisture, patient movement, and inter-implant distance. The reviewed literature indicates that intraoral scanners achieve clinically acceptable accuracy for single units and single-quadrant restorations, whereas evidence for full-arch and multiple implant-supported prostheses remains inconsistent, with several studies still favoring conventional impressions. Accuracy—comprising trueness and precision—is especially critical for passive fit in implant-supported restorations. Most comparative data derive from in vitro models that do not reproduce intraoral conditions such as saliva, blood, and patient movement, underscoring the need for further in vivo research. In conclusion, although the benefits of digital impressions are evident, their long-term clinical efficacy and safety require additional investigation, and technique selection should weigh accuracy, time efficiency, learning curve, and cost. A case-specific combination of digital and conventional approaches may offer added benefit.
    Digital impression, intraoral scanner, conventional impression, trueness and precision, prosthodontics
    Yakup Kantaci
    27.08.2026
    e260815
    Abstract Views: 234 Download: 81 DOI 10.5577/jomdi.e260815
  • Comparison of scanning accuracy of different digital intraoral scanners

    Digital intraoral scanners (IOSs) have gained significant importance in modern dentistry by offering accurate, efficient, and patient-friendly alternatives to conventional impression techniques. This review aims to evaluate and compare the image quality and accuracy provided by various intraoral scanners, focusing on the current literature. Factors influencing image quality, such as scanning technology (confocal microscopy, triangulation, active wavefront sampling), operator experience, and scanning strategy, are also discussed. The evaluation includes commonly used IOS devices, including iTero, Trios, Medit i700, and CEREC Primescan, analyzing their performance in clinical and laboratory conditions. The literature suggests that while each scanner has strengths and limitations, all of them provide clinically acceptable results for prosthodontic and orthodontic applications. Furthermore, advancements in software and hardware are continuously enhancing image resolution, data acquisition speed, and ease of use. However, despite the progress, discrepancies in trueness and precision still exist depending on the scanning environment, scan area size, and material reflectivity. This review concludes that selecting an appropriate IOS should be based on clinical needs, operator preferences, and the specific task at hand. Continuous technological development and standardized evaluation methods are essential to further improve IOS reliability and integration into routine clinical practice.
    Accuracy, intraoral scanners, digital scanning, three-dimensional imaging, digital dentistry
    Elif Atasever, Server Mutluay Ünal
    27.08.2026
    e260823
    Abstract Views: 238 Download: 73 DOI 10.5577/jomdi.e260823
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Vol. 7 No. S1 (2026) Continuous Publication
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2026
  • Vol. 7 No. S1 (2026): Current Developments in Prosthetic Dentistry
  • Vol. 7 (2026): Journal of Medical and Dental Investigations
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  • Vol. 6 No. S1 (2025): Current Developments in Pediatric Dentistry
  • Vol. 6 No. Advanced Online (2025): Journal of Medical and Dental Investigations
  • Vol. 6 (2025): Journal of Medical and Dental Investigations
2024
  • Vol. 5 (2024): Journal of Medical and Dental Investigations
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  • Vol. 4 (2023): Journal of Medical and Dental Investigations
2022
  • Vol. 3 (2022): Journal of Medical and Dental Investigations
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2021
  • Vol. 2 (2021): Journal of Medical and Dental Investigations

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