Flexible U-Shaped Mandibular Registration Gauge
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Solution Overview
Problem
Existing protrusion gauges in dental medicine cause an increase in occlusal height due to their thickness and rigidity, leading to inaccurate bite registration and difficult handling during the setup of oral appliances.
Innovation Solution
A protrusion gauge with a U-shaped impression plate capable of elastic deformation and twin bite cones, designed to minimize occlusal height increase, allowing for precise registration and non-destructive removal of the impression material, enabling accurate and easy handling of the registrate during appliance setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid and thick protrusion gauge is used, then the structural strength and stability are improved, but the occlusal height increases significantly leading to inaccurate bite registration
Solution Approach 1:
The patent applies this principle by replacing the traditional rigid thick gauge with a flexible thin-walled structure. The impression plate is made as a thin-walled container that can elastically deform to conform to the curved masticatory surface, while maintaining sufficient structural strength through its flexible design rather than rigidity. This eliminates the excessive occlusal height increase caused by thick rigid structures.
Solution Approach 2:
The patent implements dynamics by making the impression plate capable of elastic deformation. The thin-walled structure can dynamically adapt its shape to match the curved surface of the patient's teeth, allowing the gauge to conform to individual masticatory surfaces while maintaining measurement accuracy. This dynamic adaptability replaces the static rigid structure of traditional gauges.
2Stability of the object's composition
If a thick and rigid protrusion gauge is used, then the structural stability is improved, but the handling difficulty increases during appliance setup
Solution Approach 1:
The flexible thin-walled impression plate provides structural stability through its ability to conform to the masticatory surface rather than through rigidity. This flexibility makes the gauge easier to handle and adapt to different patient mouths, while the thin-walled construction maintains sufficient stability for accurate registration during appliance setup.
3Measurement precision
If a rigid protrusion gauge is used, then the measurement accuracy is improved, but the registrate cannot be easily removed for subsequent model setup
Solution Approach 1:
The flexible thin-walled structure allows the registrate (impression material) to be easily separated from the gauge after measurement. The thin walls enable the registrate to be removed without damaging the gauge or the impression, allowing the registrate to be used independently for subsequent model setup. This flexibility facilitates the separation process that is difficult with rigid thick gauges.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The gauge provides precise registration without altering the occlusal position, allowing for accurate adaptation to the masticatory surface and easy removal of the impression material, ensuring that the registrate can be used freely without the gauge, thus improving the accuracy and usability of the appliance.
Implementation Method 1
the impression plate is capable of limited elastic deformation in this area so that the associated limb of the U as a whole as well as the individual lamellae are able to conform to a curved masticatory surface on the upper and/or lower jaw
Data Source
AI summary
A device for the registration of a mandibular position that is protruded relative to the normal position, with an impression plate that is flat on both sides and whose shape corresponds to the bite of the upper and the lower jaw, whose inner and outer contour is U-shaped, that comprises, in the area of the limbs of the U, finger-like registration surfaces that extend from the inner contour to the outer contour and are arranged at a distance from each other, and that is capable of limited elastic deformation in this area. Centered in relation to the limbs of the U, bite cones for accepting the upper incisors are arranged on the upper surface of the impression plate. A shaft that is of one piece with the impression plate, is centered on the impression plate, extends in an extension of the bite cones, serves for the manipulation as well as a holder of an element that can be moved in the longitudinal direction relative to the shaft, can be moved in a longitudinal slot, and has bite cones on its underside for accepting the lower incisors. Due to its thinness and deformability, the device permits the production of removable registrates with only a small increase of the occlusal height. Due to the chosen thickness of the device it is ensured that no additional bite position change will occur in appliances to be manufactured later.