The key technologies of a computer-aided design system for removable partial denture frameworks.

Area of Science:

• Biomaterials Engineering
• Dental Technology
• Computer-Aided Design

Background:

• Developing accurate and efficient computer-aided design (CAD) systems for removable partial denture (RPD) frameworks is crucial for addressing dentition defects.
• Existing methods often face challenges in precision, efficiency, and seamless integration of components.

Purpose of the Study:

• To present a novel CAD system for the design of RPD frameworks.
• To leverage advanced modeling techniques for accurate and efficient RPD framework generation.
• To validate the system's performance against commercial CAD solutions.

Main Methods:

• Utilized optical scanning to obtain digitized dental models.
• Implemented spline curve editing in a 2D parameterized domain via conformal mapping.
• Employed iterative approximation with adaptive mesh simplification for precise mesh offsetting.
• Integrated texture mapping for interactive modeling of denture components.
• Applied an enhanced Boolean algorithm for seamless component fusion.

Main Results:

• The CAD system successfully generates RPD framework models suitable for 3D printing.
• The system demonstrated high accuracy and efficiency in spline curve editing and mesh offsetting.
• Component fusion resulted in seamless and natural integration of various parts.
• Clinical evaluations confirmed performance comparable to advanced commercial CAD systems.

Conclusions:

• The developed CAD system offers a reliable and efficient solution for designing RPD frameworks.
• The system successfully addresses challenges in accuracy and component integration for digital dental prosthetics.
• Over 30,000 clinical designs were completed, meeting high standards and demonstrating clinical applicability.