Porcelain Post and Inlay Core for Endodontic Restoration
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Solution Overview
Problem
Current methods for restoring endodontically treated teeth often result in microleakage, tooth damage, and unaesthetic outcomes due to the use of metal posts and crowns, which can lead to further complications and cosmetic issues.
Innovation Solution
A method involving a modified porcelain post and inlay core with a rhomboid shaped access opening, combined with a porcelain veneer, using materials like EMAX™ zirconia or alumina, and specific cements to prevent microleakage and provide structural support, while minimizing tooth structure removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal posts and porcelain fused to metal crowns are used to restore endodontically treated teeth, then structural strength is provided, but microleakage occurs and aesthetic appearance deteriorates
Solution Approach 1:
The patent removes the metal post and metal crown components from the restoration system, extracting the harmful elements that cause microleakage and aesthetic issues while retaining the essential structural support function through porcelain-only alternatives
Solution Approach 2:
The patent employs composite porcelain materials including porcelain posts, porcelain inlay cores, and porcelain veneers that work together as an integrated restoration system, providing both strength and aesthetic properties without the harmful metal components
2Strength
If metal posts and porcelain fused to metal crowns are used to restore endodontically treated teeth, then structural strength is provided, but aesthetic appearance deteriorates due to dark hue at cervical margin
Solution Approach 1:
The patent eliminates the metal crown component that causes the dark unaesthetic hue at the cervical margin, replacing it with a porcelain veneer that provides a natural, aesthetically pleasing appearance while maintaining structural integrity
Solution Approach 2:
The patent uses composite porcelain materials including translucent porcelain veneers and porcelain inlay cores that provide both structural support and superior aesthetic properties, eliminating the need for metal components that compromise appearance
3Ease of operation
If conventional dental drills and metal posts are used for root canal treatment, then access opening is created and structural support is provided, but tooth structure is excessively removed
Solution Approach 1:
The patent divides the restoration into separate functional components including a porcelain post for structural support, a porcelain inlay core for the access opening, and a porcelain veneer for the facial surface, allowing each component to be optimized with minimal tooth structure removal
Solution Approach 2:
The patent employs composite porcelain restorations that can be designed to match the natural tooth anatomy and require minimal preparation, preserving tooth structure while providing the necessary structural support and aesthetic appearance
Data Source
AI summary
Endodontically treated teeth can be restored with porcelain facial veneer restorations-layering ceramic and porcelains. The method includes the steps of providing a cement material for preventing microleakage into gutta percha and for forming a post-barrier space. A rhomboid access inlay-shaped porcelain core is provided with an anatomical post extension extending below a level of an existing crest of bone into a root canal space, the length of the post extension being less than one-half the length of a root canal. The modified post is seated into a post barrier cement to prevent the egress of moisture or bacterial microleakage to the apex of the root canal.