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Process parameter optimization for removable partial denture frameworks manufactured by selective laser melting.

Seyeon Hwang¹, Sangsup An², Ubaldo Robles³

¹Team Manager, ICT Business Division, Dentium Co, Ltd, Suwon, Gyeonggi-do, Republic of Korea.

The Journal of Prosthetic Dentistry

|June 13, 2021

Summary

This summary is machine-generated.

Optimizing selective laser melting (SLM) process parameters significantly improves the accuracy of 3D-printed removable partial denture (RPD) frameworks. This advanced additive manufacturing technique shows potential to replace traditional casting methods for RPD fabrication.

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Area of Science:

Additive Manufacturing
Biomaterials Engineering
Dental Prosthetics

Background:

Selective laser melting (SLM) is a promising additive manufacturing technology for removable partial denture (RPD) frameworks.
Limited studies compare SLM RPD framework accuracy and process parameter effects against traditional lost-wax casting.

Purpose of the Study:

To optimize SLM process parameters for enhanced accuracy of 3D-printed RPD frameworks.
To quantitatively analyze the impact of process parameters on RPD framework precision using an in vitro model.

Main Methods:

RPD frameworks (Kennedy Class II) were designed using CAMbridge and Magics software.
Optimized melt-pool parameters (laser power, scan speed, hatch distance, layer thickness) were determined empirically.
Framework accuracy was assessed via 3D scanning and comparison to STL designs using Geomagic software.

Main Results:

Optimal melt-pool parameters identified for density, surface roughness, and productivity.
Optimized SLM parameters yielded significantly higher accuracy (167 ±105 μm) compared to non-optimized parameters (180–222 ±136 μm).
Transverse orientation and interconnected support structures resulted in the best accuracy.

Conclusions:

Optimized SLM process parameters enable the production of clinically acceptable RPD frameworks.
SLM technology demonstrates variability in RPD framework accuracy based on process parameter design.
SLM is a viable alternative to traditional lost-wax casting for RPD framework fabrication.