How to Evaluate the Indications of an Intraoral Scanner

In recent years, intraoral scanners have significantly advanced the field of digital dentistry, these scanners offer numerous advantages over traditional impression techniques, such as increased patient comfort, improved accuracy, and streamlined workflows. However, with a wide array of options available in the market, it is important to know how to evaluate the indications of an intraoral scanner to ensure you select the right one for your practice. In this article, we will discuss key factors to consider when assessing the capabilities of an intraoral scanner.

1. Scan Accuracy (Trueness and Precision)

One of the primary factors to evaluate in an intraoral scanner is its scan accuracy. Trueness refers to how closely the digital scan matches the actual physical model, while precision refers to the consistency of repeated scans. A reliable scanner should exhibit high trueness and precision to ensure accurate digital representations of the patient's oral structures. Look for scanners that have been validated through accuracy studies and have demonstrated excellent accuracy levels such as Sirona Primescan, 3shape Trios 5/4/3, Alliedstar AS 200E/AS 260.

Be cautious of those intraoral scanners that have accuracy shift issue(low precision with data accuracy not predictable each time), such as brand DMI.

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2. Scan Accuracy at Different Speeds

Another important consideration is how the scanner performs at different scanning speeds. Some scanners may struggle to maintain accuracy when the scanning speed is increased or decreased. Assess if the scanner can consistently produce accurate scans, regardless of the speed at which it is moved. This is particularly crucial when capturing dynamic oral structures or areas that require slower movement due to their complexity.

Choosing those intraoral scanners enable you to do fast & accurate scan, rather than fast but poor scan.

3. High Definition Capabilities

The quality of the scanned images plays a vital role in the success of digital dentistry. Evaluating a scanner's high-definition capabilities involves assessing its ability to capture fine details, such as margin lines, occlusal surfaces, and mesh layouts. Look for scanners that offer superior image resolution and clarity, as this will enhance the precision and accuracy of the subsequent digital models.

There is a misleading concept that the data looks more sharpness, the data is better with more definition, enhancing the sharpness by increasing the contrast rate is not hard by compromising the accuracy, but that makes data errors at the same time, so only good sharpness based on accurate data make senses.

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4. Accurate Bite Scans

An intraoral scanner should be capable of accurately capturing different bite positions. Whether it is a normal bite, overbite, or multi-occlusion, the scanner should be able to capture the occlusal relationship with precision. Assess how well the scanner can capture occlusal details and ensure that it provides accurate bite registration for proper treatment planning and fabrication of restorations.

Through different bite pressure may cause the overbite issue, but the real accurate bite scan challenge is from those missing teeth part!

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5. Color Performance

Realistic color data is important not only for patient engagement but also for diagnostics. The scanner should be able to accurately capture and reproduce natural tooth shades and textures. By providing realistic color information, the scanner enhances the visualization of the final restoration for both the dentist and the patient.

Realistic color data display is the foundation of patient engagement, but most scanners has issue on overcoming the dark color rendering issue on transparent teeth part, while, we can see some scanners are doing well with that, such as iTero Element 5D， Alliedstar AS 200E/ AS 260, 3shape Trios.

6. Solutions for Complex Cases

Evaluate whether the scanner offers solutions for complex cases such as scanning long bridges, edentulous patients, or full arch implants. These challenging scenarios require a scanner that can capture extensive oral structures accurately. Additionally, consider the specific workflow supported by the scanner for handling such cases. Look for features like seamless stitching of multiple scans, efficient data processing, and compatibility with advanced treatment planning software.

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By thoroughly evaluating these factors, you can make an informed decision when selecting an intraoral scanner for your practice. Remember to prioritize scan accuracy, considering both trueness and precision. Assess the scanner's performance at various scanning speeds and ensure it offers high-definition capabilities for detailed image capture. Accurate bite scans and realistic color performance are essential for precise treatment planning and patient satisfaction. Lastly, choose a scanner that provides solutions for complex cases and supports a workflow that aligns with your practice requirements. With the right intraoral scanner, you can enhance your clinical workflow, improve treatment outcomes, and deliver exceptional patient care.