Preliminary Clinical Application of Removable Partial Denture Frameworks Fabricated Using Computer-Aided Design and...

Area of Science:

• Biomaterials Science
• Dental Technology
• Prosthodontics

Background:

• Removable partial dentures (RPDs) are crucial for restoring function and aesthetics.
• Traditional fabrication methods for RPD frameworks can be time-consuming and labor-intensive.
• Advancements in digital technologies offer potential improvements in RPD fabrication.

Purpose of the Study:

• To investigate the application of computer-aided design and rapid prototyping (CAD/RP) for removable partial denture (RPD) frameworks.
• To evaluate the clinical applicability and fit of CAD/RP manufactured RPD frameworks.

Main Methods:

• Three-dimensional (3D) imaging of dentition defects using a lab scanner.
• Design of RPD frameworks using commercial dental software.
• Manufacturing of frameworks via selective laser melting (SLM) technique.
• Comparative analysis of CAD/RP and traditional investment casting frameworks in 15 patients.
• Evaluation of framework fit using silicone impression and gap measurement.
• Statistical comparison of framework thickness and gap dimensions.

Main Results:

• Successful design and direct manufacturing of RPD frameworks using SLM.
• CAD/RP frameworks exhibited satisfactory retention, stability, and absence of undesired rotation.
• While the gap between occlusal rest and rest seat was slightly larger in CAD/RP frameworks compared to investment casting (P < .05), it was clinically acceptable.

Conclusions:

• Digital techniques, specifically CAD/RP, enable direct design and fabrication of RPD frameworks.
• The evaluated CAD/RP technique yields acceptable clinical results for RPD frameworks.
• This digital approach presents a promising alternative for RPD framework fabrication.