Truncated-Conical Disc Bur for Low-Torque Crown Cutting
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Solution Overview
Problem
Existing dental burs for cutting ceramic crowns face challenges in maneuverability and generate excess torque, affecting the lifetime of dental handpieces due to vertical cutting alignment.
Innovation Solution
A conical-disc-cutting-bur (CDCB) with a truncated conical disc and shank, coated with abrasive material, designed for precise cutting, which can be associated with high-speed turbines or dental handpieces, offering improved maneuverability and reduced torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cylindrical or tapered cutting bur is used for vertical cutting along the tooth axis, then the cutting function is achieved, but the maneuverability is poor and excess torque is generated affecting DHP lifetime
Solution Approach 1:
The patent inverts the conventional cutting bur geometry by using a conical-disc shape instead of cylindrical or tapered forms. The conical disc with its angled cutting surface allows the bur to cut ceramic crowns at oblique angles rather than requiring strict vertical alignment, thereby improving maneuverability while reducing torque on the DHP components
Solution Approach 2:
The conical-disc geometry introduces a new dimensional aspect to the cutting action. The conical surface with its slant height creates an angled cutting path that adds rotational freedom around the tooth axis, enabling the dentist to access difficult areas without generating excessive torque on the handpiece
2Manufacturing precision
If vertical cutting alignment is maintained with conventional burs, then cutting precision is achieved, but excess torque is generated on the tooth and DHP components
Solution Approach 1:
By inverting from vertical-cutting geometry to conical-disc geometry, the patent achieves cutting precision through the angled surface while simultaneously reducing torque. The conical disc's slant height creates a mechanical advantage that distributes cutting forces more favorably, maintaining precision without excessive torque on the tooth and DHP
3Productivity
If conventional cylindrical or tapered burs are used, then the cutting function is achieved, but maneuverability is difficult due to vertical axis alignment requirements
Solution Approach 1:
The conical-disc geometry adds a rotational dimension to the cutting bur's operation. The angled cutting surface allows the bur to effectively cut while rotating around the tooth axis at various angles, improving access to difficult areas and enhancing overall cutting efficiency without compromising maneuverability
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
The CDCB provides precise cutting of ceramic crowns with reduced torque, enhancing the longevity of dental handpieces and improving cutting efficiency.
Implementation Method 1
the surface of the truncated conical disc can be coated with an abrasive material. Non limiting examples for abrasive material can be natural diamond powder or synthetic diamond powder
Data Source
AI summary
A novel disc-cutting bur to be used by a dentist in order to cut ceramic crowns is disclosed. The disc cutting bur may comprise a shank and a cutting disc, wherein the shape of the cutting disc is a truncated cone.