By Dr. Eleni Siamplettou | Lead Dentist & Laser Specialist at Dentall Clinic
At Dentall Clinic we believe exceptional dental care is rooted in verifiable science. Your comfort, lasting results, and the ultimate accuracy of your treatment are our highest priorities. This detailed article explores the single most transformative change in modern dentistry, the move from traditional, messy molds to high-precision Digital Scanning.
While the research and data presented here are technical, this guide is designed to show you why we have invested in this advanced technology. We want you to understand how our commitment to evidence-based methods eliminates patient discomfort, reduces your chair time, and guarantees the highest standard of accuracy for all your dental prosthesis and cosmetic dentistry needs, including procedures like crowns, veneers, and implants.
In the evolving world of dentistry, the shift from conventional impression techniques to digital dental scanning represents a significant technological leap. This article explores the differences between these two methods, highlighting the advantages of digital scanning in modern dental practices and reviewing the science that supports this transition.
Traditionally, dental impressions, the mold used to create crowns, bridges, and other restorations, have been captured using physical materials. This process typically involves filling a dental tray with a viscous material, such as alginate or silicone, which the patient must hold still while biting into it until the material sets. While this method has been the standard for decades, it can be uncomfortable for patients (often triggering a gag reflex) and can be time-consuming for dental professionals, sometimes requiring multiple attempts to get a precise mold.
Conventional impressions also carry key disadvantages:
Despite these limitations, many practitioners still use this method due to lower initial costs and familiarity.
Digital dental scanning introduces a high-tech, non-invasive approach to capturing precise dental impressions. Instead of plaster and putty, these systems use advanced Intraoral Scanners (IOS) that rapidly capture thousands of images of the teeth and gums. These images are “stitched” together by software to create a highly detailed, three-dimensional (3D) digital model. This method is quick, comfortable, and highly accurate, offering a clear advantage over traditional methods and forming the essential first step of the modern digital workflow.
Advanced scanners use optical or laser technologies to map the mouth in exceptional detail, creating files that can be used immediately for:
The transition to digital is driven not just by technology, but by measurable gains in the dental office.
Research by Joda et al. (2017) directly compared the two techniques for single-implant impressions in a controlled study. The findings showed a significant difference in time and efficiency:
The study concluded that for single-implant sites, digital scanning was more than twice as time-efficient. Furthermore, both dental students and experienced dentists found the digital method to be less difficult and more applicable than the conventional tray method. While most students preferred the speed of the digital scan, experienced dentists were more evenly split, indicating that clinical comfort and familiarity still play a role.
Medically reviewed by the Clinical Operations Team | Updated January 2026
| Feature | Digital Scanning | Conventional |
|---|---|---|
| Accuracy | High Precision: Eliminates material shrinkage and human error. | Variable; prone to tray movement or putty distortion. |
| Comfort | Gag-Free: Quick, non-invasive wand-based imaging. | Messy impression materials; often triggers gag reflex. |
| ESG / Safety | Eco-Friendly: 100% digital transfer; zero plastic waste. | Physical storage needed; high chemical/plastic waste. |
A comprehensive review of the literature by Mangano et al. (2017) confirms that digital scanning provides numerous operational and patient benefits:
Digital dental scanning is now essential in a variety of modern dental disciplines:
Accuracy is non-negotiable, particularly for complex restorations. A recent in vitro study by Baresel & Baresel (2025) focused on the trueness (how close the scan is to the actual object) and precision (repeatability of the scan) for full-arch impressions.
The research compared five popular scanners using a standardized model with metal spheres as reference points. The key finding relates to the influence of technology:
This finding provides evidence that technology advancements are overcoming one of the longest-standing challenges in digital dentistry: maintaining accuracy over the full dental arch.
The digital impression is only the first step; the true efficiency is realized when that file is used for fabrication. The article by Miyazaki and Hotta (2011) documents the pivotal shift from traditional lost-wax casting to Computer-Aided Design and Manufacturing (CAD/CAM).
Today, the drive toward digital fabrication is fueled by patient demand for metal-free, all-ceramic restorations (like zirconia and highly sintered glass). The digital scan is imported into CAD software, where the crown or bridge is designed. That design is then sent to a milling unit (the CAM part) to carve the restoration out of a ceramic block.
This digital process provides mechanical durability and precise fit and entirely bypasses the need for the older, less predictable casting systems, accelerating the fabrication process and increasing overall practice efficiency.
While the initial price tag for an IOS system is high, dental practices should calculate the Total Cost of Ownership (TCO) and Return on Investment (ROI). TCO includes not just the initial purchase, but also mandatory annual software subscription fees and maintenance. The ROI is realized through:
When using digital scans, practices face a key workflow decision:
While digital technology is rapidly becoming the standard, prospective users must be aware of the investment and learning curve involved:
Digital scanning introduces the challenge of managing vast amounts of sensitive patient health data (PHI). Practices must ensure that the transfer, storage, and retrieval of these large 3D scan files adhere strictly to privacy regulations like HIPAA in the U.S. or GDPR in Europe. This requires secure cloud storage solutions or robust local server management, adding a necessary IT component to the dental workflow.
The integration of Intraoral Scanners continues to pave the way for the next generation of dentistry.
Digital dentistry is moving rapidly toward:
This constant innovation is what drives the field toward a fully digital standard of care.
The comparison between digital dental scanning and conventional impression techniques highlights the innovative strides dentistry has made. While digital scanning requires significant investment, the benefits, enhanced accuracy, patient comfort, time efficiency, and superior results in advanced procedures like DSD and CAD/CAM fabrication, are undeniable. The benefits are leading more dental practices to adopt this advanced method, making digital scanning the rapidly emerging standard of care in modern, patient-centered dentistry.