Gradient Dental Milling Blank for Adhesive-Free Bonding
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Solution Overview
Problem
Existing methods for producing dental moldings, such as dental prostheses and occlusal splints, face challenges including high material loss, time-consuming processes, wear on tools, and aesthetic issues due to adhesive bonding and material limitations.
Innovation Solution
A milling body with a solid body made of a biocompatible first material, featuring a cavity for receiving a fluid polymerizable plastics material, allows for the direct joining of two materials without adhesives, enabling rapid and resource-saving production of dental moldings using subtractive CAM methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive bonding is used to connect base and tooth portions, then connection is achieved, but aesthetic quality deteriorates due to visible adhesive layers and imperfect transitions
Solution Approach 1:
The patent merges the base and tooth portions into a single integrated milling blank with a gradient structure. The base portion and tooth portion are not separately bonded but are continuously integrated through a transition zone with varying material composition, eliminating the need for adhesive bonding and achieving seamless aesthetic transitions.
Solution Approach 2:
The milling blank uses composite materials with a gradient structure where the material composition varies continuously from the base portion to the tooth portion. This composite structure allows different regions to have optimized properties while maintaining a seamless appearance without visible bonds or transitions.
2Ease of manufacture
If traditional subtractive milling is used to produce dental moldings, then manufacturing is achieved, but material loss increases and tool wear accelerates
Solution Approach 1:
The patent applies preliminary action by pre-forming the milling blank with the exact gradient structure and geometry required for the final dental prosthesis. The blank is prepared in advance with the correct material distribution and shape, minimizing the need for extensive material removal during the milling process and thereby reducing material waste.
3Adaptability or versatility
If prosthetic teeth are shortened by basal grinding, then occlusal height is adjusted, but processing time increases and tool wear increases
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the occlusal height of prosthetic teeth during the manufacturing of the milling blank itself. The gradient structure and preliminary shaping ensure that the correct occlusal height is achieved before the final milling process, eliminating the need for time-consuming basal grinding and reducing tool wear.
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
This approach reduces material waste and tool wear, simplifies the production process, and achieves high accuracy and aesthetic quality by eliminating the need for adhesive bonding and allowing for direct milling of the final shape.
Implementation Method 1
a cavity for receiving a fluid polymerizable plastics material
Data Source
AI summary
The invention relates to a milling body for producing a dental molding, the milling body comprising a solid body made of a biocompatible first material, a cavity for receiving a fluid polymerizable plastics material being arranged on an upper side of the milling body, the cavity having a bottom and, starting from the edge of the bottom, the cavity being laterally delimited by a circumferential wall, the circumferential wall being annular, and the first material forming the bottom and the solid body extending as far as a lower side of the milling body, which lower side is arranged to be opposite the upper side of the milling body.The invention also relates to a method for producing dental prostheses using such a milling body, to a set, and to a dental molding produced using such a method.