Dental Milling Adapter with Elevated Clamping Surfaces
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Solution Overview
Problem
Existing dental milling block holders and adapters face challenges in maintaining stability and preventing rotation during machining processes, particularly with round holders of smaller cross-sections, which can lead to malformation of dental restorations due to insufficient clamping force and anti-turn locking mechanisms.
Innovation Solution
An adapter for dental milling block holders featuring a fastening screw with an internal thread and elevated clamping surfaces, providing a 90° displacement for force distribution and a positive connection to prevent rotation, along with a symmetrical design allowing for secure fixation in both 0° and 90° positions, and a pointed cone for easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a round holder with smaller cross-section is used to reduce cost, then manufacturing cost is reduced, but rotation prevention becomes insufficient and reliability deteriorates
Solution Approach 1:
The holder is segmented into a round body and a separate anti-turn locking device with a groove in the flange, allowing the main holder structure to remain simple and economical while adding rotation prevention functionality through a dedicated component
Solution Approach 2:
A nose on the adapter acts as an intermediary element that engages with the groove in the holder's flange to prevent rotation, separating the rotation prevention function from the holder's main clamping structure
2Ease of manufacture
If the holder flange thickness is limited to 1 mm for cost reasons, then manufacturing cost is reduced, but the anti-turn locking device cannot be effectively attached
Solution Approach 1:
The adapter with the anti-turn locking nose is nested over the holder's flange, with the nose engaging the groove from the adapter side, allowing rotation prevention without requiring additional flange thickness on the holder itself
3Reliability
If the holder is inserted far enough for the nose to lock in with the groove, then rotation prevention is achieved, but insertion precision requirements increase and operation becomes more difficult
Solution Approach 1:
The grooved flange and corresponding nose are designed to engage automatically upon insertion, preventing rotation before machining forces are applied, rather than requiring precise post-insertion adjustment
4Reliability
If a distinct neck is provided in the holder for anti-turn locking, then rotation prevention is improved, but the holder becomes subject to breaking at the neck position and strength is reduced
Solution Approach 1:
The anti-turn locking function is segmented into a separate adapter component with the groove and nose, rather than being integrated into the holder's neck area, preserving the holder's structural integrity
Solution Approach 2:
The adapter acts as an intermediary that provides the anti-turn locking mechanism without requiring modifications to the holder's neck structure, preventing stress concentration and potential failure points
Data Source
AI summary
The invention provides an adapter for a dental milling block holder with a dental milling block (52 and 54) or dental grinding block, which is attached to a dental milling block holder, in particular glued on, wherein the dental milling block holder is provided with a round shank which is mounted in the adapter (40). It is characterized in that the adapter (40) is provided with at least one internal thread (92) for the mounting of a fastening screw (31) which acts on the shank, to which fastening screw (31) inside the shank mount of the adapter (40) of the fastening screw (31) positioned opposite of it, at least one in particular elevated, in particular at least two elevated clamping surfaces (74 and 76) are formed against which the shank abuts.