Histo-anatomic 3D printing of dental structures

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Digital Dentistry

Background:

• Achieving natural aesthetics and biomechanics in dental restorations is a significant challenge.
• Manual fabrication of high-aesthetic restorations relies heavily on dental technician skill.
• Computer-Aided Design/Computer-Aided Manufacturing (CAD/CAM) restorations are increasingly adopted due to process simplicity.

Purpose of the Study:

• To explore the potential of '4D-printing' technologies for fabricating multi-layered dental restorations.
• To introduce digital manufacturing processes for multi-layered anterior teeth using 3D multipart printing.
• To demonstrate the fabrication of natural tooth replicas using advanced digital techniques.

Main Methods:

• Investigating available '4D-printing' technologies for dental applications.
• Describing the digital manufacturing workflow for multi-layered anterior restorations.
• Utilizing 3D multipart printing to replicate the structure of natural teeth, focusing on the dentine-enamel junction (DEJ) and outer enamel surface (OES).

Main Results:

• Multi-layered restorations offer aesthetic advantages over monolithic ones but are difficult to produce digitally.
• The form of the dentine core, defined by the DEJ, is crucial for automated digital fabrication.
• Successful digital fabrication requires a transparent layer mimicking enamel to create the OES.

Conclusions:

• '4D-printing' and 3D multipart printing offer promising avenues for the automated digital fabrication of aesthetic, multi-layered dental restorations.
• Replicating the natural tooth structure, including the DEJ and OES, is key to achieving lifelike restorations.
• These digital technologies have the potential to overcome the limitations of current manual and digital fabrication methods for complex dental restorations.