Telescopic Double Crown Design via 3D Scanning and CAD
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Solution Overview
Problem
The precision and accuracy of telescopic crowns or double crowns are difficult to control in manual work, leading to challenges in achieving a good fit, and the size and expansion of materials used in wax casting are hard to predict and control.
Innovation Solution
A method for designing telescopic double crowns using 3D scanning to virtually design both the primary and secondary parts, ensuring their surfaces match with a well-defined angle, allowing for precise digital manufacturing and eliminating the need for casting, thereby improving the fit and reducing production time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual work is used to make telescopic crowns, then flexibility and ease of manufacture are maintained, but precision and accuracy of fit deteriorate
Solution Approach 1:
The patent replaces manual mechanical work with a computerized system that uses 3D scanning to capture tooth impressions and CAD software to design the double crown components. This substitution of manual mechanics with digital design tools directly resolves the contradiction by providing both high precision through software-controlled design and ease of manufacture through automated digital workflows.
Solution Approach 2:
The patent transforms the manufacturing process from manual physical modeling to digital parameter-based design. By changing the state of the design process from tactile manual manipulation to computer-controlled digital parameter adjustment, the system achieves superior precision while maintaining ease of manufacture through software automation.
2Manufacturing precision
If wax casting is used to manufacture crowns, then traditional manufacturing methods are followed, but size and expansion of materials become difficult to predict and control
Solution Approach 1:
The patent replaces the wax casting process with direct digital manufacturing methods. By eliminating the casting step entirely and using CAD/CAM technology to design and manufacture the crowns, the system gains precise control over material dimensions and eliminates the unpredictable expansion issues inherent in wax casting, while reducing overall process complexity.
3Productivity
If traditional design methods are used, then existing workflows are maintained, but production time and costs increase
Solution Approach 1:
The patent replaces traditional manual design and manufacturing workflows with automated computerized systems. The 3D scanning and CAD design automation eliminate time-consuming manual steps, directly reducing production time and associated costs while increasing the level of automation in the dental prosthesis manufacturing process.
Data Source
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AI summary
Method for designing a partial removable denture for a patient comprising the steps of: - providing a 3D scan of the patient's teeth; - virtually designing a framework; - virtually designing at least one telescopic double crown, wherein the at least one telescopic double crown comprises an internal crown which is defined as a primary part, and an external crown which is defined as a secondary removable part, and wherein virtually designing the at least one telescopic double crown further comprises the steps of: - virtually designing the primary part; - virtually designing the secondary part; and - automatically generating the external surface of the primary part and the internal surface of the secondary part to have matching shapes, where at least a region of the external surface of the primary part and the corresponding region of the internal surface of the secondary part are substantially straight having the same well-defined angle.