The technology behind dental 3D printing solutions has amazed many application engineers. In particular, a revolutionary solution like Truedent, based on PolyJet's technology and multi-material jet printing, enables dental labs to produce beautiful, precise one-piece dentures at scale.
Now let's reveal how exactly truedent works.
Polyjet technology
The Polyjet uses material jetting (inkjet) technology to deposit tiny liquid photopolymer droplets layer by layer, curing and bonding each layer with ultraviolet light. In the Truedent device application, five base color resins (cyan, magenta, yellow, white, and clear) are loaded into the J5 DetentaJet PolyJet 3D printer and jetted with precise combinations to create specific tonal contours, resulting in a single denture containing the base and teeth.
Other 3D printing technologies, such as DLP, can only produce dentures in sections, and the base and dentures must be assembled manually. The PolyJet is capable of producing full-color dentures in a single, continuous print job, achieving high fidelity between design and finished product, resulting in a better fit for a better bite in the patient's mouth.
During this process, a unique support material is also sprayed at the same time as the resin material used to make the dentures, encapsulating each part in its entirety, ensuring a complete replica of the denture's geometry. This support structure is then removed by a high-pressure water jet without any damage to the surface of the denture.
How Truedent uses PolyJet technology to produce dentures
TrueDent resin material is an exclusive application of the J5 DentaJet platform to create accurate, full-color dentures through a digital workflow, and not only that, but also to reprint exact replicas when needed. Let's take a brief look at how this process works.
Digital design
The dental laboratory usually receives a request from the dentist for the production of dentures. Dentists can choose the most suitable denture color for their patient from 10 base colors and 19 different translucent tooth shades available from Truedent, or obtain denture color information through intraoral scanning. Dentures are designed based on patient data on dental CAD software, and the final design is imported into the Grabcad Print software platform as an STL 3MF file.
Choose the color of the base and teeth
The operator assigns shades to the teeth and substrates via GrabCAD printing software, and can even assign a different shade to each tooth in a set of dentures. Once the tone is dispensed and boxed, the software automatically nests and orients each part on the tray to optimize the print job.
Unattended printing
In J5 DetentaJet operation, two sets of each resin base color and support material combination are loaded for "hot swapping" to ensure that the resin does not run out during the printing process. Unlike other technologies, with the PolyJet, the operator does not need to deal with uncured resin, which also ensures a safer working environment.
Multi-material jetting
Using five base colors and support materials, each resin is attached to a printhead, and a single nozzle drops the resin one drop at a time to produce a predetermined shade, including the appearance of the basal capillaries and the internal structure and translucency of the teeth.
Precise layer control
After the resin droplets are deposited, each layer is leveled.
UV curing
Each layer is cured with a UV lamp and then the layers are bonded. Once the monolayer is cured, the jetting, mixing, and leveling steps are repeated to form a new print layer before curing it.
Supporting structures
The support material in the PolyJet process wraps the model in its entirety and can be removed with a high-pressure stream of water, so there is no need to recontour and leave no traces of the support material.
The Truedent solution, powered by PolyJet technology, enables the creation of up to 30 dentures simultaneously in a single print job, each with a different color paletteIt can be said to be the best solution for denture making.