Dental alumina processed material

JP7874111B2Active Publication Date: 2026-06-15KURARAY NORITAKE DENTAL
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Patent Information

Application Number
JP2023570869
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-12-27
Filing Date
2022-12-16
Publication Date
2026-06-15
Estimated Expiration
2042-12-16

AI Technical Summary

Technical Problem

Existing dental prostheses made from zirconia lack sufficient translucency and aesthetic appeal, requiring additional ceramic coatings to mask metallic glare, and traditional methods struggle to replicate the natural translucency and strength of natural teeth.

Method used

A dental alumina workpiece with varying average crystal grain sizes along its length, specifically at different points corresponding to the incisal edge and cervical area, to achieve a gradient-like translucency and strength similar to natural teeth, without the need for additional ceramic coatings.

Benefits of technology

The dental alumina workpiece achieves high translucency, strength, and linear light transmittance, mimicking natural teeth aesthetics, while eliminating the need for additional ceramic coatings and ensuring structural integrity.

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Abstract

The present invention provides an alumina workable body for dental use which, upon sintering, produces a sintered body which has excellent translucency, strength and linear light transmittance. The present invention pertains to an alumina workable body for dental use, wherein D1 and D2 differ from one another, if D1 is the average crystal grain diameter after sintering at a first point within an interval extending from one end P of the alumina workable body for dental use to 25% of the entire length along a straight line which extends in a first direction from said one end P toward the other end Q, and D2 is the average crystal grain diameter after sintering at a second point within an interval extending from the other end Q to 25% of the entire length along said straight line.
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Citation Information

Patent Citations

  • Sintered alumina and its manufacturing method and use

    JP2001213664A

  • Aluminum oxide wear resistant member and its production process

    JP2004026513A

  • Wear-resistant aluminum oxide member with layered structure and preparation method therefor

    JP2004307239A

  • Polycrystalline Translucent Alumina Ceramic Materials

    JP2005514305A

  • Ceramics blank for multilayer-structure dental cutting processing having high color tone reproducibility

    JP2017185163A