Artificial Teeth with Pre-set Occlusal Facet Angles
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Solution Overview
Problem
Achieving bilateral balanced occlusion in denture production is a time-consuming and demanding process due to errors in alignment and grinding adjustments, making it challenging to replicate the occlusal state effectively using existing artificial teeth.
Innovation Solution
The artificial teeth are designed with specifically set angles for occlusal facets of various teeth relative to the occlusal plane, ensuring homogeneous contact and glide between incisal edges and occlusal facets, facilitating easier adjustment and production of reliable occlusion using a mean value articulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional artificial teeth are used requiring grinding adjustment to achieve bilateral balanced occlusion, then reliable occlusion can be achieved, but the production process becomes time-consuming and labor-intensive
Solution Approach 1:
The occlusal facets of the artificial teeth are pre-formed with specific angles relative to the occlusal plane during manufacturing. This preliminary action eliminates the need for time-consuming grinding adjustments later, while still achieving reliable bilateral balanced occlusion through the pre-configured geometric relationships between cusps and fossae.
2Reliability
If conventional artificial teeth are used requiring grinding adjustment, then proper occlusal contact can be achieved, but the complexity of the production process increases
Solution Approach 1:
The invention specifies precise angular parameters for the occlusal facets relative to the occlusal plane. By controlling these geometric parameters during manufacturing, the complex grinding adjustment process is replaced with a simpler assembly process, reducing production complexity while ensuring proper occlusal contact.
3Adaptability or versatility
If preliminary grinding adjustment is performed to achieve bilateral balanced occlusion, then occlusal state can be adapted to patient-specific mandibular movements, but the precision requirements increase the difficulty of the work
Solution Approach 1:
The artificial teeth are manufactured with pre-calculated angular relationships that account for mean value articulator settings. This preliminary configuration provides a standardized foundation that maintains adaptability to mandibular movements while eliminating the need for high-precision custom grinding, reducing manufacturing precision requirements.
Data Source
AI summary
It is intended to provide artificial teeth designed to easily enable bilateral balanced occlusion with less grinding adjustment. According to the present invention, angles formed by occlusal facets of the artificial teeth with an occlusal plane are suitably set. An artificial tooth for maxillary central incisor, for example, has a protrusive facet and a retrusive facet on an incisal edge thereof. Of angles formed by the protrusive facet with the occlusal plane, the angle in cross section along a sagittal plane is 22.0° to 25.5°, and the angle in cross section along a coronal plane is 1.5° to 6.5°. Of angles formed by the retrusive facet with the occlusal plane, the angle in cross section along the sagittal plane is 20.5° to 23.0°, and the angle in cross section along the coronal plane is 1.5° to 6.5°.