Patient-Specific Articulator Joints for Dental Prostheses

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Solution Overview

Problem

Current dental prosthesis production methods rely on generic articulator joints that fail to accurately replicate individual patient jaw movements, leading to poorly fitting dental prostheses that require extensive finishing by dentists, which is skill-dependent and prone to errors.

Innovation Solution

The method involves determining and registering the unique movement paths of a patient's jaw joints using the intercept theorem and pantograph principle to create joint space duplicates, allowing for the production of articulator joints that precisely match the patient's jaw joints, enabling the dental technician to manufacture prostheses that fit accurately without further finishing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If generic articulator joints are used to simulate jaw movements, then the device complexity is reduced and ease of manufacture is improved, but the manufacturing precision and reliability of the dental prosthesis fit deteriorate

Engineering Contradiction:
Improveprecision of prosthesis fitVSAvoidcomplexity of articulator joints
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent creates joint space duplicates that are exact copies of the patient's actual jaw joint movement paths. These duplicates are produced using the intercept theorem and pantograph principle to replicate the precise three-dimensional movement trajectories. By copying the actual joint space geometry rather than using generic articulator joints, the system achieves high manufacturing precision for prosthesis fit while keeping the articulator design conceptually simple.

Inventive Principle:
Principle #26Copying

2Manufacturing precision

If individualized joint space duplicates are produced for each patient, then the manufacturing precision of the prosthesis is improved, but the productivity and ease of manufacture deteriorate due to extensive manual finishing required

Engineering Contradiction:
Improveprecision of prosthesis fitVSAvoidproduction efficiency of dental prosthesis
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The patent performs preliminary action by determining and registering the joint space duplicates before the actual prosthesis manufacturing process. The movement paths are captured and stored in the articulator joints in advance, allowing the dental technician to work with pre-programmed articulator joints that automatically guide the prosthesis fabrication. This eliminates the need for time-consuming manual finishing and adaptations by the dentist, significantly improving productivity while maintaining high precision.

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If the dentist performs extensive finishing of the prosthesis after insertion, then the adaptability to patient-specific conditions is improved, but the loss of time and productivity deteriorate

Engineering Contradiction:
Improveadaptation to patient conditionsVSAvoidtime for finishing work
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent implements self-service by enabling the dental technician to manufacture the prosthesis with built-in patient-specific adaptations using the individualized joint space duplicates. The articulator joints contain all necessary information about the patient's jaw movement characteristics, allowing the prosthesis to be self-adapted during manufacturing without requiring subsequent dentist intervention. This eliminates extensive finishing time while maintaining full adaptability to patient conditions.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS10092378B2Method for producing dentures and articulator for carrying out the method
Publication Date: 2018.10.09 AVOSAX GMBH
  • US10092378B2 patent drawing
  • US10092378B2 patent drawing
  • US10092378B2 patent drawing

AI summary

For producing dentures, a new method and device render it possible to evaluate and shape movements generated by the individual jaw joints of the patient such that work with appropriate articulators becomes possible, which employ the individual jaw joints as articulation joints and thus carry out the identical movements. The known articulators are equipped with joint-space duplicates such that they can be employed with optimal equipment for the respective patient. The support pin is moved back as fixing pin in the retral space of the articulator such that it does not constitute an impediment when working on and when inspecting the jaw models arranged on the frame upper part and the frame base part. Moreover, setting different biting positions is made significantly easier, because the frame upper part is fixed to a swivel arch of the frame base part by an adjustable position stabilizer but can also be detached.