Digital Denture Design

Digital Denture Design

Step 1: Check the situation of patient’s teeth
Step 2: Make a treatment plan

Treatment plan:

Step1: chose a digital workflow using the Ivotion Digital Denture System from Ivoclar Viva-dent. Ivotion gives the dental team the freedom of multiple workflow.

Step 2: options: the lab can scan a conventional impression or the doctor can use an IOS chairside and send an electronic file directly to the lab. The monolithic Ivotion disc— incorporating both tooth and denture base materials—allows for complete dentures to be milled in one uninterrupted process, increasing efficiency and reducing manual labor. Since the step of bonding denture teeth is eliminated, production time is reduced
and a stronger denture is created.

Case study

Step 1: Took a wash impression of the existing denture, scanned the impression using 3Shape TRIOS and sent the file to the laboratory. Since the wash impression serves as both a final impression and a bite registration, the team would be able to proceed straight to a milled try-in, saving an appointment.

Step 2: The lab imported the scan into the Ivotion system, which is integrated into the 3Shape Dental System. The software identified the anatomical landmarks and the border of the denture, then generated the appropriate size tooth mold from the Phonares II tooth library which can be changed as desired based on a patient’s features.

Step 3: The scan of the patient’s existing denture was digitally faded in (shown in blue) to assist with the new setup. Doing so clearly showed the differences between the old and new denture and allowed Wiand to work with the existing denture to make changes, including moving the midline, showing more or less of the tooth, having more or less flare or widening the buccal corridor. At this stage, teeth can easily be moved individually or as a group, similar to a conventional setup. It was determined that the patient’s VDO was excessive, resulting in a “gummy” smile. Using the digital articulator in the 3Shape software, Wiand closed the VDO four millimeters and chose a longer tooth than the one used in the existing denture. The photo shown under Step 3 illustrates the setup with improvements including the VDO reduction resulting in less gum display.

Step 4: Upon completion of the setup, the denture base was finalized. The blue ribbon shown above represents the outline of Ivotion’s shell geometry (the three-dimensional tooth and arch structure contained in the Ivotion denture disc). The ribbon shows precisely where the tooth material meets the denture base material and the blue lines on the top and bottom of the setup show the border of the disc. At this stage, the blue ribbon can be moved in any direction using the handles to adjust the gingiva into the proper position.

Step 5: After the setup was aligned in the disc and completed the final contour of the waxup and then sent the case to the PrograMill PM7 Mill to manufacture the try-in.

Step 6: At the try-in appointment, both the doctor and patient praised the precise fit of the Ivotion try-in and approved it. And doctor milled the final denture and then refined the inter-proximal and pumiced using conventional polishing techniques.

Final Result
The final denture was delivered. The Ivotion Denture System addressed and overcame all of the patient’s complaints, improved esthetics and resulted in a denture with precise fit and excellent strength. “Ivotion helps us continue to improve our processes and options resulting in more benefits for our doctors. It’s another valuable tool in our toolbox”