Spherical Dental Drill Bit for Oblique Bone Drilling
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Solution Overview
Problem
Existing dental drill bits are not suitable for drilling holes in oblique bone surfaces due to their design, which can lead to improper hole angles and template dislocation during guided surgery.
Innovation Solution
A dental drill bit with a spherical drill head and helical flutes, designed for guided surgery, that includes a surgical template with a guide hole to accurately drill oblique surfaces by maintaining engagement and preventing sideways movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional drill bit with a point angle is used, then it can be used in guided dental surgery, but it cannot effectively drill oblique bone surfaces without causing template dislocation
Solution Approach 1:
The drill bit features a spherical drill head instead of a conventional pointed tip. This spherical geometry allows the drill to maintain contact with the oblique bone surface throughout the drilling process, preventing sideways movement and template dislocation while effectively drilling at various angles.
Solution Approach 2:
The drill bit is divided into distinct functional sections: a spherical drill head for engaging oblique surfaces, a cylindrical intermediate portion with helical flutes for chip removal, and a shank for machine attachment. This segmentation allows each portion to perform its specific function optimally.
2Manufacturing precision
If a spherical drill head is used to drill oblique surfaces, then accurate hole placement is achieved, but chip removal efficiency must be maintained
Solution Approach 1:
The drill bit separates the spherical cutting head from the chip evacuation function by adding a cylindrical intermediate portion with helical flutes. This allows the spherical head to maintain precise contact with oblique surfaces while the helical flutes efficiently remove chips through the cylindrical section.
Solution Approach 2:
The cylindrical intermediate portion acts as an intermediary between the spherical drill head and the drill machine shank. It provides a pathway for chip removal while maintaining the precision of the spherical head and the mechanical connection of the shank.
3Adaptability or versatility
If the spherical drill head diameter is increased to match the cylindrical portion diameter, then side cutting capability is improved, but the overall device complexity increases
Solution Approach 1:
The spherical drill head geometry provides inherent side cutting capability across its entire surface. By making the sphere's diameter equal to the cylindrical portion's diameter, the transition between sections is smooth and the side cutting function is maximized without requiring additional complex features.
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 drill bit effectively drills holes in oblique bone surfaces with precise angle control, ensuring accurate hole placement and efficient chip removal through the helical flutes, preventing template dislocation.
Implementation Method 1
at least one helical flute extending from the spherical drill head towards the second end
Data Source
AI summary
A dental drill bit is combined with a surgical template provided with a guide hole adapted to guide the dental drill bit directly or via a guide sleeve provided in the guide hole. The dental drill bit has a first end, a second end, a spherical drill head arranged at the first end, and at least one helical flute extending from the spherical drill head towards the second end. The portion of the dental drill bit having the at least one helical flute is substantially cylindrical. A use of such a dental drill bit and a method of drilling a hole in an oblique bone surface of a jaw bone of a patient are also provided.