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Clinical Precision with a Streamlined Digital Restorative Workflow

Categories: Digital Impressions, Restorative Dentistry

Author(s): Brian Wilk, DMD

Date: 01-15-2020 07:58:00 am

The iTero Element 2 intraoral scanner is equipped with next-generation computing power that enables reduced scan processing and faster start-up time, allowing a full-arch scan to be performed in as little as 60 seconds.

There are many benefits to digital intraoral scanning, but the greatest is that you can really zoom in and see whether you’ve captured everything.

And if you missed something, such as debris on a tooth, you can delete the scan in just that area, rescan that one little spot, and seamlessly reinsert it into the original scan. If you miss an area using impression material, you’d have to take a new impression of the entire arch or quadrant.

In my practice, digital scans are the vehicle that drives the entire restorative process, and this case is a great example. The patient was a 52-year-old man who had a cantilevered restoration that was in need of replacement. It was determined that replacing the cantilevered restoration with a single-tooth implant would be the best long-term option. I prepped tooth No. 12 to the gingival margin and made a cantilevered temporary over that area so the implant could be placed.

About 8 weeks later, I took a digital impression (iTero Element 2 Intraoral Scanner, Align Technology). There’s a myth circulating around dentistry that you can’t scan anatomy that’s subgingival, but with proper gingival retraction, this is something I’ve been doing successfully for years. By contrast, traditional impression taking can force impression material below the gingival margin and create a thin film of impression material. This thin film doesn’t create the most accurate impression because it can distort easily. iTero Element 2 intraoral scanner

Once I hit the send key on my iTero Element 2 scanner, Align Technology received the case and sent it to Dentsply Sirona, who digitally designed the custom Atlantis abutment with the proper clearance, angulation, and parallelism to the adjacent prepped tooth. It’s important that the abutment is designed in parallel with the prep so that there is no insertion issue with the crown and implant crown. My lab, Broadway Dental in Feasterville, PA, approved the design the next day.

The round-headed implant scan body (Dentsply Sirona) was converted to a replica of the abutment in the milled model right next to the adjacent natural prepared tooth No. 12. Before receiving a physical model, my dental lab was able to use the digital fi le to design the crown and implant crown on the digital model. So, within 3 days, the implant abutment was milled and shipped to my lab along with the model from Align.

The implant (Astra Tech Implant System EV, Dentsply Sirona) has a unique interface that provides one-position-only placement, which eliminates any difficulty when inserting the implant abutment and crown. The final crown was placed 2 weeks after the final impression was captured. Because of the digital scan, I had perfect impressions, perfect preps, and the case wrapped up beautifully when I inserted the final restoration.

Clinical precision is only one advantage of using the intraoral scanner. Treatment acceptance is another—it’s amazing how patients can self-diagnose once they see their problems on the screen. Sometimes, I’ll show patients a scan and they’ll ask, “Why aren’t you doing this other crown?” It’s tough to hit a patient with a $3,000 dental bill, so I might tell them that since it’s not horrible, we can take care of it down the road. To my surprise, once they see the scan, the patient will often say, “Let’s do them both.”

Intraoral scanning with a system like the iTero Element 2 scanner doesn’t just create revenue through case acceptance. It’s important to note that every time you scan, you save money. In the long run, you’ll get a better-fitting restoration with fewer remakes, fewer problems, and a “wow” factor that leaves patients with the feeling that dentistry is actually a science instead of someone just drilling on their teeth.

preop radiograph

Figure 1: Preop radiograph

 

 

 

digital impression using itero element 2

Figure 2: Digital Impression (iTero Element 2
Intraoral Scanner, Align Technology) of natural
tooth and scan body simultaneously

 

occlusal view of impression showing natural tooth

Figure 3: Occlusal view of impression showing
natural tooth and scan body

 

 

milled model showing tooth prep

Figure 4: Milled model showing tooth prep No. 12
and implant abutment analog No. 13

 

 

occlusal view of final restoration

Figure 5: Occlusal view of final restoration

 

 

 

buccal view of final restoration

Figure 6: Buccal view of final restoration

 

Go-To Product Used in this Case: iTero Element 2 

The iTero Element 2 provides improved screen resolution while minimizing scanner footprint due to its slim 21.5" monitor and 16:9 widescreen viewing format. The enhanced color offers a more thorough look at patients' oral health. Designed with a center-mounted wand cradle, the system provides ideal ergonomics during scanning. The integrated lithium-ion battery provides easy mobility from operatory to operatory without the need to plug in for power or reboot. The improved wand touchpad is as intuitive as gesturing on a smartphone and can be used to switch between scanning segments or rotate the model on screen. 

 

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