Tips & Tricks for successful Lucitone Digital Print Dentures

1. Always immediately cap the bottle after pouring the resin – ensure cap is tight.
2. Immediately close the printer door after pouring resin.
3. Do not leave the resin in the cassette/vat for an extended period of time.
4. Minimize the exposure to ambient light with the resin in the cassette/vat.
5. Immediately pour resin back into the bottle after the print job is complete – refer to the Recycle instructions in the Illustrated Technique Guide (ITG) or Instructions for Use.
6. Do not expose resin to excessive light or heat (always store the resin between 60°F/16°C and 80°F/27°C). 

Improve your cleaning process by following these tips:

1. Use ≥ 99% Isopropyl Alcohol (IPA) for first and second wash. The use of lesser concentrations of IPA can result in improper cleaning of excess resin, and result in whitening/discoloration. 

2. Confirm only Lucitone Digital Print™ (LDP) is being washed in each container. Washing multiple materials (ex: model resin and LDP) in the same container could result in cross contamination and whitening/discoloration. Do not wash Lucitone Digital IPN denture teeth in IPA that was used to clean Lucitone Digital Print™ 3D Denture Base.

3. Follow cleaning instructions for the ultrasonic cleaner. As instructed in the IFU, always perform both the first and second wash cycles. Using an ultrasonic bath, wash for 2 minutes (first cycle), then wash for 1 minute (second cycle). The container should be closed when placed in the ultrasonic bath. Wash each denture individually. Ensure all excess resin (appears white) is brushed away using a brush soaked in clean ≥ 99% IPA in between the first and second wash. Use fresh IPA for the second ultrasonic wash. Prolonged exposure to IPA could cause changes in the physical properties and discoloration. When using a brush to wipe away remaining resin, always use a brush soaked in clean ≥ 99% IPA.

4. Do not use a steam cleaner on the digital denture. The use of a steam cleaner can cause whitening/discoloration of the finished and polished denture. Dentsply Sirona recommends the use of an ultrasonic cleaner.

Improve your Fuse & Cure process by following these tips:

1. Confirm correct use of Lucitone Digital Fuse™ Steps 1, 2 & 3 Total for the bonding process. When using Lucitone Digital Fuse™ Step 1 3D Tooth Conditioning Agent with DS Multilayer PMMA denture teeth or IPN 3D™ Digital Denture Teeth, allow the teeth to air dry for 2 minutes. Do not wipe dry. When using Lucitone Digital Fuse™ Step 2 3D Denture Bonding Resin, ensure that each tooth is tack cured for 10 seconds. Ensure that Lucitone Digital Fuse™ Step 3 Total is applied to the cervical areas of all carded teeth or milled teeth (avoid thick application or puddling). Ensure that Lucitone Digital Fuse™ Step 3 Total is applied to the entire surface of printed teeth (avoid thick application or puddling). Ensure that all excess Lucitone Digital Fuse™ Step 2 3D Denture Bonding Resin is removed before tack curing and final curing.

2. Follow validated tack curing and curing procedures for the Lucitone Digital Print Denture™ System. Inadequate tack curing or final curing can cause an air inhibition layer to be formed, which can lead to whitening. Validated curing units are the DS Digital Cure Large Capacity Unit, DS Digital Cure unit and the inLab Speedcure^® unit.

3. DS Digital Cure Large Capacity Unit Precuring Step. After applying Lucitone Digital Fuse™ Step 3 Total or Step 3 3D Sealer to printed denture teeth, tack cure the denture teeth prior to final curing in the DS Digital Cure Large Capacity curing unit using the UV Tack-Cure Light. For 1 minute, rotate the arch under the UV-Tack Cure Light ensuring light exposure to all tooth surfaces. The sealer will be slightly sticky/tacky to the touch - avoid excess handling.

4. Follow curing unit cool-down procedures. It is important to leave the digital denture(s) in the curing unit for the entire cool-down timeframe. Removing prematurely could result in the denture(s) not being fully cured which can lead to whitening and discoloration:

• inLab Speedcure^® Processing Unit: 3-minute cool down for both cure cycles
• DS Digital Cure Large Capacity Unit: wait until the temperature indicator reaches 50°C before removing the denture.
• DS Digital Cure Unit: Up to 30 minutes.

How to solve common problems with Posterior Teeth

• Occlusion at rest is misaligned. This happens when the centric is not captured correctly, the design is not articulated or when no bite registration material was used. To improve the Try-In, try to modify it using new occlusal records ensuring centric registration is repeatable. Also, fabricate a bite registration and reprint the Try-In.

• The Vertical is open. The likely cause is an inaccurate bite registration or the centric not being captured correctly. To improve, adjust any areas that may be impeding proper closure of bite, add wax to close and re-establish correct vertical, and rescan, redesign, and reprint the Try-In.
• The Vertical is closed. Several reasons may cause this, including the bite registration was not performed accurately, there can be a burn-through on the custom tray, the centric is not captured correctly or there is insufficient vertical space. To overcome these issues, adjust the Try-In for intaglio high spots, establish a centric relationship, take a new impression with registration bite, and then rescan, redesign, and reprint the Try-In.