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Translucent Enamel Is A MotherDoctor For All Intra-Oral Scanners And Their Accuracy

One of the most important lessons a digital dentist has to learn quickly is how to not introduce errors when scanning dentition.  The most likely area when s/he can introduce errors is in the anterior area where the incisor are not only narrower than molars but can also have translucent enamel.  Add just a little spacing between teeth with diastemas and you can quickly distort the accuracy of the model.  This is true of ALL intra-oral scanners in the market

There are a few ways you can overcome these issues and the second video highlights some of our preferred methods. The concept is easy- block the light from travelling through the tooth structure and you are set!  Watch the videos to learn how to do it

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The Problem With Light Travelling Through Enamel and Intra-Oral Scanners

Examples of how light shinning through the enamel instead of bouncing back resulting in errors in model accuracy

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Using the CT as a Remount Jig If You Have Lost The Vertical Dimension For Some Reason or Another

At CAD-Ray, we have now designed over 20,000 implant cases since 2013. One of the most common requests we get is from doctors doing full arches and their desires to reduce the conversion time. A simple thought to keep in mind is that A LOT can be derived from the actual implant plan, even if you don’t do the surgery guided. You can extract the digital implant positions and fabricate temps and based on your level of experience, your conversion / temporary time can drastically reduce.

Another very helpful matter to keep in mind is a concept we preach a lot at our courses. It deals with relating models to each other, both automatically and manually. This can be a CT scan to an intra-oral scan, or a pre-op to a post op. You just have to find redundant landmarks for the software to merge the models together. One thing to keep in mind, particularly with the Medit i500 is that when you merge models to each other and process it, their relationship to each other is preserved.

There is a lot of benefit that can be derived from that. For example, in this video, we have the dicoms converted to surface STL’s which is very easy to do. We also have the intra-oral scan merged to that stl file. You can digitally extract the teeth and do bone reductions, and if you are ever in a bind where you lost track of the vertical dimension, you can use the jaws as the means to related the preop to post-op. Or you can even use the nose if you are really desperate.

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Relating Large Models to Each Other
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A Mix of All of the Medit Features Include Compare, Smile Design, Model Imports, CT scans, Image, Videos, etc…

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Compare and Smile Design Features

in this case we import multiple models, videos, CT scans, and Face Scans so that our users can utilize all of these features. Click here to enter the member’s section to download the whole case and design along

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How Medit’s AI Killed The Tibase Scanbody Star!

here is a list of why the Medit Artificial Intelligent Implant Suprastructure Identification System is significantly more advantageous over all other cadcam systems.

  1.  It s technically a crown and bridge case and the implant location or timing does not matter
  2. You can find margins outside the mouth!  See the first video to appreciate the significance of this
  3. You don’t have to deal with retraction or hemostatis at all
  4.  You don’t have to worry about sprue position. Many other systems force the placement of the sprue to a specific location often making the case more difficult to manage than necessary
  5.  you are not limited to just a few implant lines
  6.  you don’t have to worry about location of anti rotational notch
  7.  you can digitally alter the prep and get a virtual reduction coping in cad
  8.  Use any restorative block you want.  There is no need to order special blocks with pre-fabricated access channels and keep a large inventory of many colors. Your regular block inventory will suffice.  Just make sure the top of the tibase is wider than the diameter of the drill used to mill out the intaglio.  Also, the CAM and the milling machine determine the exact product and different settings maybe utilized to give you relief off the walls.  Some will even remove the antirotational notch because the adaptation is so tight, the restoration will not rotate due to the tall walls of the tibase
  9.  You can check the fit outside the mouth on the same tibase or a one you keep chairside for every case to let you know that if you are not seating, it is clearly a contact or contour issue as opposed to an intaglio issue.

 

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Digital Tibase - Medit's AI Feature

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Fit of Tibase to Milled Restoration

With Medit’s Crown Fit function, you can see exactly how much cement is required to seat the restoration and how well it is adapted to the tibase.

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Medit Crown Fit
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Prep Sequence for Easy Access

The following pictures depict the sequence of burs we recommend that you use to finish a preparation quickly. While patient is getting numb, take a quick look at the clearance you will need to reach proper material thickness. Once the quadrant is isolated with isolite and optragate, take an occlusal router bur and create a trough to gain the proper depth. Follow that with a flat disk, and you can quickly reduce the occlusal height.

A shoulder bur of .8 mm thickness can help you reduce the interproximal areas as well as the buccal and lingual margin lines. Before finishing the prep, place hemostatic agent like expasyl in the sulcus and place retraction cord. while it is setting, check your reduction. If you need more space, now is the time to reduce some more.

Once you have adequate clearance, retraction, and hemostatis, you can readily image and find your margins in the CAD software

 

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Prep Sequence for Easy Access
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Single Click Launches Shining3D CAD Program

Shining3d has a projector and a single camera that takes photos of the surfaces it is scanning. at first, you may think this is a shortcoming, but in many ways, it dramatically reduces errors a new user can introduce.

in the early days of cerec, all you needed to do was capture the margins and the area above the height of contours of the adjacent teeth. This made the try-in and the contacts really easy as the design software just dropped straight a straight wall down to make contacts to. same concept here!

also, after you image and place margins, A SINGLE CLICK takes you to design software where you can finish the case and mill it right away.

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shining3d single click launch into CAD software
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Milling Tibase Crowns to CEREC MCXL with a Medit Scan and exocad design software

One of the big limitations of CEREC (a registered trademark of denstply sirona) with tibases and implant crowns is that it is limited to very few implant lines and the antirotational notch can just ruin your day as it needs to go into a specific location. You also have to deal with making sure the tibase is seated all the way and the scanbody is properly indexed.   The one benefit is that you are dealing with just crown and bridge and you do not need to know implant position or timing at all when doing the design.

In this case, we demonstrate how we utilize the Medit i500 to capture a Tibase from Blueskybio, Biomax NP Conical Connection.  Once the tibase is seated, we simply start scanning and then use the artificial intelligent implant suprastructure identification system to identify the location of the tibase.  This in essence allows you to capture your margins OUTSIDE the mouth and you don’t have to bother with imaging the tibase, which is highly reflective in the patient’s mouth.

Once processed, you can then modify the tissue digitally and gain access to the tibase margins.  You can print the model if you want and manufacture the restoration. In this particular case, we took the design to the CEREC mcxl inlab cam, nested it, and milled it out to demonstrate how we can image with one device from one manufacturer and fabricate a restoration by another company’s manufacturing machine.  But the single greatest benefit is that you can place the sprue wherever you want.

IMPORTANT NOTE: The Tibase that you use MUST be wider than the drill milling the intaglio and the sprue must be thick enough to handle the milling process.

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image tibase in medit i500 and mill with mcxl

 

Once you understand how the digital workflow goes, you can image with one device, design in another, and then either print or manufacture with yet another device. Here we mill a sectional stent with the cerec that was designed in Blueskybio plan, although printing makes more sense because it is less wear and tear on your drills

PRODUCTS USED IN THIS CASE:

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SprintRay Software Announcement Webinar Recap

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SprintRay RayWare 2.5
1.31K subscribers
Last Thursday, we announced RayWare 2.5 – the software update that makes your SprintRay 3D printer new again. Watch the announcement here to learn about Pixel Toning, Parallel Slicing, Ludicrous Speed, and much more. Full-Length Video: https://youtu.be/Cix1DNNQdYY Download RayWare: https://sprintray.com/software/ Request a Dental Model Sample: https://store.sprintray.com/samples
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Multi Unit Abutment on ANY Fixture

If you place enough implants, you may find yourself in need of a prosthetic part that just isn’t manufactured by anyone.  For example, you may have a hybrid case on Bicons and for some reason you wanted to restored them with Multi Unit Abutments (MUA) and photogrammetry, yet there are no parts manufactured for such an endeavor.  The problem is complex because a manufacturer needs to mass produce these parts and get them past regulatory matters.

Some have found a simple solution, which is to have the parts custom made specifically for the implant.  If they need the MUA part before the procedure, they just send a digital or physical model into a lab that can custom make the part.  The lab itself needs a prescription form on the lab analog.  Since it is custom made, you have direct input on how tall you want the height of the margin, how much  you want to displace the tissue, how much would want the restorative head angled, etc..

Most people will order a variety of them to address any situation on the same model and keep it in stock.  What’s important to realize is that from the restorative standpoint, all your CAD software needs to know is the location of your abutment margins.  It doesn’t care where fixture is and how the timing is lined up in the arch form. As long as it knows where the margins are, you can proceed with the design of the prosthesis.

 

 

Contact Andrew Seddler to send a digital or physical model and an Rx to get your custom made MUA’s

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Image in Medit and Mill with CEREC

A dentist from Australia named demonstrates in this video how you can scan with the Medit i500 and import the stl file into CEREC Inlab18, design a restoration, and fabricate a restoration.

This is a great option for CEREC users who want a second intraoral scanner or want to upgrade from bluecam to a color scanner, even though you can’t design in color

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Short Summary of Advantages of in Digital Dentistry

DISTINCT ADVANTAGES OF DIGITAL IMPRESSIONS

Here are two very simple examples of clinical advantages of digital impressions over analog ones.  You can edit or add to your models and you can work independent of time and sequence.

You can also know immediately if you have captured your margins correctly. Once you understand these concepts, there are dozens of ways you can apply these principles to make some of the most challenging clinical cases very easy to manage

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distinct advantages of digital dentistry over analog dentistry

FIND OUT HOW RESTORING IMPLANTS CAN BE THE MOST PREDICTABLE PROCEDURE YOU CAN DO

For decades, placing and restoring implants was a very stressful and unpredictable procedure. Digital dentistry has reversed that trend, making it now the most predictable procedure you can perform. You can easily capture contacts, opposing dentition, and the location of the implant. More importantly, you can design the emergence profile to your liking.

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advantages of digital implant impressions

SEE HOW EASY IT IS TO ADD A CONTACT TO A RESTORATION WITH AN OVEN

Emax restorations are milled in a pre-crystalized state (blue phase) as it is more gentle on the drills than the final crystallized form. A big advantage of emax lithium dissilicate material is that you can easily add contacts with addition powder in the same cycle as glazing. This reduces the stress of try-ins and allows you to recover without wasting precious time. Other materials on the other hand may require extensive oven times or a re-mill (or send the restoration back to the lab)

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adding contacts to emax

 

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Virtual Extractions for Overdenture with Shining 3D

upper denture duplicated with shining 3d. only needed the occlusal and buccal surfaces as the case is for a lower overdenture over immediate extractions, on healed implants. went ahead and just duped the whole denture with the ios. very good results

took off lower temps and scanned lower jaw. remaining teeth were used for long term temp abutments while implants healed. digital extractions performed and right vertical dimension for digital prosthesis design

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duplicating upper denture extra-orally

Full arch imaging of mandible in preparation of overdenture

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lower arch scan for overdenture on healed abutments

buccal bite taken intra-orally to mount arches at proper vertical dimension.  you can see how the camera performs in this challenging case

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intra-oral full arch bite with shining 3d

Digital extractions performed in preparation  for overdentures

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virtual extractions for overdenture

Overdenture Design and Fabrication

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How To Offer Digital Clear Aligner Therapy

Do you want to straighten your teeth but don’t want to pay $5000?
This is how most patients think today.
“I want straighter teeth but I don’t want to go through the pains of an uncomfortable/inconvenient experience or ridiculous price tag.”
Of course you as the clinician first needs to first decide if the case presented is a candidate for clear aligners instead of brackets.
Either way, using technology allows dentists and orthodontists to offer the ultimate customer experience and drive costs down.
This also allows freedom of choice for clear aligner brands you want to work with. You can even offer aligners in-house using a 3D printer for ultimate control and cost savings.
If you’re interested in offering clear aligners in-house and branding them as your own, you will need a full CAD/CAM set up. This involves intraoral scanners, orthodontic planning softwares, 3D printers (with wash & cure stations), and suckdown machines.

 

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Intraoral Scanning: The Basics & How It Works

Demonstrating the clinic to lab connection using technology. So much faster, so much easier.
You can replicate this workflow in your practice for anything from basic crown and bridge to full arch rehabs and clear aligner therapy.
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Open System Technology: What Is It And Why Is It Important?

If you’re experienced with CAD/CAM technologies in dentistry, you probably already know how important file types and system integrations can be for the outcome of a project.

In this video, we briefly preview a workflow that is 100% digital and allows the user to freely select which products and programs they want to use within the phases of production.

 

 

Practicing with open system technologies puts the user in the driver seat allowing them to maintain control & freedom.

Furthermore, as time goes on these users can freely replace and upgrade components according to their treatment plans and the rate of innovation.

In conclusion, once doctors decide to upgrade their practice into digital workflows, they should invest in open system technology. When they make this decision they will experience several advantages such as cost savings, flexibility, more product options, and future proof set ups.

 

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Dental Labs to the Rescue with 3D printed parts for first responders

During these uncertain times with the COVID-19 virus, CAD-Ray has been on the front lines in the 3D printing and 3D design movement trying to help print masks and other goods for Healthcare workers on the front lines.

The other day, one of our CAD-Ray team members needed some help of his own

Story by CAD-Ray.com CTO, Jonathan Acker

It gives me great satisfaction to write this blog post. We are living in a strange time, and I’m glad to be able to share a positive story during this COVID-19 outbreak. This story bridges the gap between my worlds, and shows how the dental industry has A LOT to give during the fight against the virus.

Besides getting to work everyday at CAD-Ray with the most innovative team and customers in the dental profession; a life-long passion of mine has been serving my community in the role of firefighter/EMT at the Fallston Volunteer Fire and Ambulance Company in Harford County, Maryland. I’ve been riding ambulances and fire trucks since I was 16 years old – for the last 5 years at this department in the town where I reside. When I’m not working or home with my family, I can be found driving the ambulance, providing patient care as an EMT, or responding to the fire and rescue calls in our community. Holding the rank of captain, one of my roles is to ensure that all of our men and women in the Fire/EMS service have ample PPE to serve the public in a safe manner.

On Tuesday night March 24th at about 9 PM, the assistant chief of the department was inquiring if we knew anyone with access to a 3D Printer. I let him know that in my day job, I have access to many great dental labs who are experts at 3D printing. It turns out, this connection would allow us to solve a big problem.

In the midst of a massive PPE shortage because of the COVID-19 virus, equipment like N95 respirator masks are hard to come by, and are IMPERATIVE to keeping first responders like the members of my department safe as they interact on 911 calls with the public.

One potential solution to the lack of N95 masks is a filter fitting (that are readily available) that could snap into a firefighter’s own personally issued mask. This is the same mask that firefighters and medics would use to connect to their breathing apparatus regulator in the case of a fire. This seemed like a great solution for our department because it would adapt to our already existing equipment and avoid the use of disposables during this shortage –  except there was one problem – there is a specific 40mm circular adapter that is required to fit the mask mounted housing for the filter to the filter itself – and due to the shortage of supplies – this small part as NOT AVAILABLE FOR 10 WEEKS.

Luckily,we were able to get an  OPEN .STL file of the part we needed. So at 9:30 PM, with the .stl file ready to share – I reached out to some friends in the dental lab business via text, email, and of course, facebook.

Within Minutes. Adam from Triple Crown Lab in Maryland, Rachel from Best Dental Studio in Maryland, Dr. Ho representing BARAN Dental Lab in Virginia, Colin from Red Mountain Dental Arts in Washington, and Rob from Patriot Dental Lab in Michigan all had responded saying they would be happy to help. I sent the file out and awaited some news.

By 11 PM Rob at Patriot Dental Lab had told me that one of his Technicians, Chad was already in the lab loading up resin, and getting the first 9 adapters printed. ( We need 20-40 for the department). By 2 PM the next day I had a message from Rob saying our first batch was printed, and on the way, and by 10 AM Thursday, we had our first set of adapters in hand, verified their fit and function, and issued to members of our department. An additional 18 are on the way from Rob as well as some others from the above mentioned labs.

Needless to say, I am so greatful to all of the lab owners who jumped in to help our department in our time of great need, especially Rob from Patriot Dental Lab who jumped out of bed, got to work and had these much needed parts in our hands in less than 30 hours, from 10 states away!

Dentistry, especially our great labs have so much to give during this time, and on behalf of CAD-Ray.com and the Fallston Volunteer Fire and Ambulance Company commend and thank all of you true Patriots who jumped in to help when we needed it most. It will never be forgotten!

When the time comes, please don’t forget to give Rob and all the labs above a shot next time you need some lab work done – they are In it for the RIGHT reasons. .

 

Mask Mounted n95 filter                    

 

The Problem – Missing the needed adapter

The solution – 3D printed 40mm adapters          
Adapter in place                                                                                         
Adapter in place with n95 filter                                                                  
ready to serve!