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Scanner Tip Dimensions and Their Impact on Accurate Scanning

An often overlooked characteristics of an intra-oral scanner is the scan area / window. The larger the area, the more likely it is that your scanner will stay on track and not derail and introduce errors. In this video, we demonstrate how a small scan area, rendered either digitally or by small sized tips, can readily introduce errors known as the Veersing Effect. We can overcome this easily just by holding the camera in a proper orientation.  Some scanners make this much easier because of their tip dimensions.  The Trios 5 is 19mm x 13mm, the Medit tip is 15 x 13, and the DEXIS 3800 Side Tip can capture up to 19.6 mms.  The 19 mm tip size makes these scanners the preferred ones for larger implant cases with extended edentulous spaces between the suprastructures.

In the video below, we will explain how the capture window size (field of view) affects the accuracy of intraoral scanning and provide tips on how to optimize the capture of data during scanning

Medit Tip Dimensions

DEXIS 3800 Tip Dimensions

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“Veersing” Effect – How Intra-Oral Scanners Introduce Errors in Edentulous Jaws and Flat Planes

In the world of digital dental scanning, precision and accuracy are paramount. To shed light on the potential pitfalls and challenges faced by dental professionals, Dr. Armen Mirzayan of CAD-Ray has put together an eye-opening video. In this demonstration, Dr. Mirzayan explores the intriguing concept of The “Veersing” Effect and how it can lead to scanning errors when using digital dental scanners. We’ll delve into the video to understand the nuances of these errors, using examples from some of the leading brands we sell, including the Trios 5, Dexis 3800, and Medit 700. Each of these devices possesses its own unique features and capabilities, making them essential tools in modern dentistry.

Understanding Scanning Errors:

Scanning errors can have significant consequences in the dental industry. From inaccurate digital models to flawed treatment planning, these errors can compromise patient care and results. In Dr. Mirzayan’s video, we uncover the ‘Veersing’ phenomenon and its relevance to scanning errors. “Veersing” is essentially the involuntary loss of awareness of a digital scanner, causing it to not recognize its position and create errant or double images.

Additional Note: It’s essential to understand that in dentate cases, the properties of enamel can introduce errors. These errors arise from refraction, reflection, and light transmission through enamel. The asymmetric tooth morphologies can help your scanner stay on track. In edentulous cases, we face a different set of challenges related to the symmetric anatomy of the object being scanned, making it easy for the software to plot data points where they don’t belong.

Handheld vs. Desktop Scanners:

One of the video’s key takeaways is the difference between handheld and desktop dental scanners. Handheld scanners, like the ones we’ve featured, capture images and stitch them together to create digital models. Desktop scanners, on the other hand, take multiple views of a stationary object (also, with a wider field of view), resulting in higher accuracy and less room for errors. Understanding this distinction is vital in avoiding ‘Veersing’ and other scanning errors.

Examples of Scanning Errors:

Dr. Mirzayan demonstrates the potential for scanning errors with real-world examples from the video. These examples provide a visual insight into how ‘Veersing’ can affect the accuracy of digital models created with these scanners.

Preventing Scanning Errors:

To prevent ‘Veersing’ and other scanning errors, proper scanner positioning is crucial. Maximizing the field of view is key, as it allows for more accurate data capture. Additionally, considering the virtues of desktop scanners, which inherently provide multiple views of stationary objects, is another important step toward achieving precision.

Importance of Accuracy in Digital Dentistry:

The overarching message of Dr. Mirzayan’s video is clear – accuracy in digital dental scanning is non-negotiable. Avoiding scanning errors is a cornerstone in treatment planning, leading to better patient outcomes and more precise dental work, and steps can be taken to reduce the potential for those errors.

Conclusion:

In a world where dental technology is constantly evolving, understanding and preventing scanning errors are paramount. Dr. Armen Mirzayan’s video is a valuable resource that highlights the nuances of ‘Veersing’ and scanning errors, providing insights for professionals to enhance their scanning processes. We invite you to watch the video and embark on a journey to a more accurate and precise dental practice.

Share your thoughts and experiences with us regarding digital dental scanning. If you have any questions or concerns about the scanners mentioned in the video or any other dental technology, don’t hesitate to reach out to CAD-Ray. For more information, please visit our website at www.cad-ray.com and watch Dr. Mirzayan’s video to gain a deeper understanding of ‘Veersing’ and the importance of avoiding scanning errors.

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The Veersing Effect
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Meet the OXO Akura Photogrammetry Machine

OXO has made capturing implant locations very easy. The software is very simple and intuitive and we can get you from a to z very quickly.  But first lets showcase how to set up the machine: In this video we discuss how the scanflags are seated on multi unit abutments: this next video shows how simple […]
To access this page and view the premium content and support, you must either be a customer of CAD-Ray or purchase CAD-Ray Membership.
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A Preview of the Fastest Way to Design a Large Temporary Prosthesis

DOWNLOAD THE CASE TO DESIGN ALONG

One of the most challenging designs to do chairside is the design of a multi unit temporary that needs to be printed.  This is incredibly time consuming as you spent significant amount of time just marking margins on a dozen units.  With this technique pioneered by CAD-Ray you can bypass the margination step and design a large case in about a minute.

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Short Version

There are specific rules and steps you need to follow and one mis-step can cost you a lot of time.  You must also understand that you need to keep slicing software limitations in mind so you are not frustrated with the results.  Here is a summary:

  1. you cannot have any holes or gaps in any model or between two models that you are trying to combine/unite
  2. you must understand the difference between working and non working surfaces and how to manipulate them
  3. in your wax up designs, you must make sure that the wax up model ALWAYS extends past the margins of your preps.
More Detailed Version
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More Detailed Version

join us in one of our seminars to learn how to expedite this process and learn it in detail

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Capturing Dynamic Mandibular Movements with Medit, an Unapologetic Patent Infringing Feature of 3Shape’s Proprietary and Intellectual Property?

The clash of the titans are in full effect.  We are not smart enough to understand all the dynamics of patented software and hardware. While we let the manufacturers sort it out, we wanted to demonstrate how the new mandibular jaw movements are captured in Meditlink


 

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Additional Scans Catalog Box in Medit Software

Many scanners limit the number of scans you can take on a patient.  This becomes cumbersome when you want to image pre-existing conditions, tissue scans for implantology, and other advanced needs

With version 3.0 in Meditlink software, launched in October of 2022, you can import or scan multiple models in the same patient chart

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Setting Occlusal Plane and Vertical Midline in 3D

Download the 3D Occlusal Plane and Vertical Line
horizontal plane and Vertical line

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Here’s a tutorial on how to use tinkercad in more depth

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Scanbodies and Edentulous Ridges

Scanning long span edentulous is a very likely culprit with rendering dimensionally accurate models because to the software and camera, the geometric shapes are too identical across the ridge.

The more we can disrupt the symmetry with large, short, non-reflective and asymmetric scanbodies, the more likely we are to keep the models accurate. This video presentation address some of those issues and how to overcome them.

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Introducing Powerball 2.0 by Dr. Johnathan Abeneim

This webinar hosted by CAD-Ray is an information program detailing the specific screw called the Powerball for Full Arch Hybrid Restorations

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New 3Shape Trios 5 Pricing and Catalogs

Scan Assistant

Why is this a significant step?

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Product Brochures

3Shape TRIOS Product Catalogue 22.1

 

PC Catalog 21.4
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Self Guided Tours of CAD-Ray Facility and its Offerings

Are you interested in an office build out or incorporating technology into your practice?

feel free to visit us when we are conducting courses or sign up to take a self guided tour at your convenience when you come out to Las Vegas for a business trip. You can reach us by emailing support@cad-ray.com

 

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Do NOT use the Double Cord Technique in the Traditional Manner for Digital Impressions

There is a concept in digital dentistry that is called “mixing good and bad data”.  What you have to appreciate is that two different objects can’t occupy the same space in the same 3D model.  The clinical example of this is when you pack 2 cords, image the margins, then remove the top cord and image the preparation some more.

This introduces a lot of errors and distortion at the margins. You either have to image with 2 cords retracting the tissue at once or take top cord out and the image the only remaining cord.  This is a habit that has carried over from analog that most users can’t seem to get past and often get frustrated with the results. See the video for a detailed explanation

 

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margin visualization
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Medit’s Artificial Implant Supra-structure Identification System in Action

In this presentation we detail the implant suprastructure identification system where an existing abutment is removed and scanned extra-orally to capture the margins readily after the abutment is anodized

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abutment identification preview
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Capturing a Dynamic Bite with the Trios 4 Wireless Scanner

In this video we demonstrate for new and potential users of digital dentistry a implant restoration where the dynamic bite is captured.  We initially imaged the upper and lower jaws with 2 bites. Then we captured the dynamic bite and the returned for the jaw scan with the scanbody. There are many ways to approach this but this sequence we have found to be easiest for new users to digest.

The scanbody was captured after the bite because it usually is taller than the adjacent teeth. There is a chance you may injure the patient if you don’t follow the proper sequence

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Patient Specific Motion Capture

Here is the fabrication process with Amber Mill Direct and DOF craft milling machine

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Introducing the Medit i700 Wireless Intra-Oral Scanner

In April of 2022, Medit launched its wireless version of the i700 intra-oral scanner.  We’ve been testing it ever since and are impressed with the range that it has. You want to be within 10 meters but more importantly you want to have clear line of site from the scanner to the hub. Much like anything else that is wireless, the further you are from the receiver the more difficult it is to maintain connection. In this video we demonstrate the distance at which you can maintain good connectivity.

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Testing the Range of the i700 Wireless

After connectivity we tested its ergonomics. Some users get frustrated with tangled cords that are teathered to the laptop computer. This is a great solution and there is not much weight added to the device making it very easy to handle

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Ergonomics of Medit i700 Intra-Oral Scanner

In this video we show the layout of the battery pack, the scanner, and the dimensions of the battery pack.  It is very easy to remove them and swap them with fully charged nodes.

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Wireless Medit i700 Battery Configuration

In this video we had the chance to scan a full set of upper and lower temporaries. You can see all the great features of the scanner in action where we capture the maxilla and mandible in little time.

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Full Mouth Rehab under Sedation

  the patient was sedated and intubated for the case so we could not keep track of the bite. Instead, we imaged all 30 prepared teeth and used medit compare / design to digitally mount them to the wax ups. In the link provided you can download the models and relate them to each other […]
To access this page and view the premium content and support, you must either be a customer of CAD-Ray or purchase CAD-Ray Membership.
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Fast and Easy Full Arch Temporary by Medit Design Software

Medit Compare, now called Medit Design, now has a boolean cut feature that lets you extract a temporary shell model from wax up or mock up model and prep model for easy and quick designs without painful margin marking on multiple units

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Proper Cooling Will Increase Tool Life and Reduce Milling Time

Most if not all milling machines do not adequately cool the tools or restoration while milling.  At CAD-Ray we have developed augmenting tools that reduce or eliminate any dry milling of glass ceramic restorations.  We can either run tubing from the holding tank or we can submerge the block for soaked milling

 

 

Coolicant Spray
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Top Reasons Why Restorations from Digital Impressions Don’t Fit

Much like conventional impressions, digital impressions can render ill-fitting restorations.  It is imperative to figure out the source of the problem and to understand if it is a scanning or manufacturing issue.  We have compiled the top reasons for such errors in this article:

    1. If the restoration is manufactured on printed models, you should be alarmed! There are so many variables that can be introduced in additive manufacturing process that can lead to less than desired results.  Printed models should only be used after restorations are milled to assess contacts or to dial back bulky material to the margin on they die.
    2. Translucent / transparent enamel can lead to inaccurate scans.  This is most magnified when we work on conservative preparations made on enamel.  See this article to understand the troubles that can be introduced while scanning glass. aa

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Comparing Intra-Oral Scan with Printed Model

3. We highly recommend that the clinician places his or her margins as soon as they image the preparation. Oftentimes, labs only work with STL models instead of color models and this leaves a lot of room for open interpretation and errors.  Labs can then print the models to finish work like contacts and reducing margins they have bulked out to protect the material whilst milling.

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Mark your own margins