Multi-diameter Drill Bit Curved Lands Friction Reduction
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Solution Overview
Problem
Existing implant drill bits cause significant thermal and mechanical damage during dental implant procedures due to high friction, leading to inefficient energy transfer and potential bone tissue damage, with conventional lubricants offering limited solutions.
Innovation Solution
The development of a multi-diameter drill bit with a unique design featuring cylindrical and conical portions, helical flutes, and radially curved land areas to minimize surface contact and reduce friction, along with a parabolic flute option for enhanced debris removal and deeper drilling capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard mechanical drill bits are used with close contact to surrounding hard tissue, then drilling torque and drilling drag are generated, but friction increases significantly causing thermal and mechanical damage to bone tissue
Solution Approach 1:
The drill bit incorporates radially curved land areas instead of straight lands, creating a curved contact surface that reduces the contact area between the drill bit and bone tissue. This curvature modification decreases friction and heat generation while maintaining drilling effectiveness, directly addressing the technical contradiction between reliable drilling and tissue damage prevention.
Solution Approach 2:
The drill bit features multi-diameter sections with different land configurations - cylindrical portions with curved lands and conical portions with varying contact characteristics. Each section is optimized for specific drilling conditions, allowing the drill to maintain effectiveness while minimizing friction and thermal damage at different depths and angles of insertion.
2Manufacturing precision
If multiple surgical implant drill bits of varying diameters are used, then implant bed preparation is achieved, but treatment time increases and friction losses accumulate
Solution Approach 1:
The drill bit integrates multiple functional sections in a single tool - including cylindrical and conical portions with different diameters and curved land areas - enabling it to perform multiple drilling functions that traditionally required separate drill bits. This multi-functionality reduces treatment time while maintaining the precision needed for proper implant bed preparation.
Solution Approach 2:
The invention combines multiple drill bit functions and diameter variations into a single integrated tool, merging the capabilities of several separate drill bits into one device. This consolidation eliminates the need for multiple tool changes and reduces cumulative friction losses, directly addressing the time loss issue while preserving manufacturing precision.
3Power
If drill bit operating surface is in close contact to surrounding hard tissue, then drilling torque is generated for rotation, but friction reduces operational efficiency and increases energy loss
Solution Approach 1:
The radially curved land areas reduce the linear contact length between the drill bit surface and bone tissue, decreasing frictional forces. This curvature modification allows the drill bit to generate necessary drilling torque for rotation while minimizing friction energy loss, directly resolving the contradiction between power generation and energy efficiency.
4Object-affected harmful factors
If conventional lubricants are used to reduce friction, then some friction reduction is achieved, but compatibility, efficacy and biologic compliance issues arise
Solution Approach 1:
The invention extracts and eliminates the need for external lubricants by modifying the drill bit geometry itself. The radially curved land areas and multi-diameter design inherently reduce friction and heat generation through geometric optimization, removing the dependency on lubricants with their associated compatibility and biologic compliance issues.
Solution Approach 2:
The drill bit is designed to reduce its own friction and heat generation through its geometric features - the curved lands and multi-diameter configuration create reduced contact areas that self-regulate friction without requiring external lubricating substances. This self-service approach avoids all lubricant-related compatibility and compliance problems.
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 multi-diameter drill bit significantly reduces friction and heat generation, minimizing bone tissue damage and allowing for more precise and efficient implant bed preparation, reducing treatment time and improving implant stability.
Implementation Method 1
The multi-diameter drill bit is divided into a drill tip, a drill body and a drill shank. The drill body includes a first cylindrical portion and a second cylindrical portion, which are integrally formed with each other. The first cylindrical portion has a first length and a first diameter. The second cylindrical portion has a second length and a second diameter. Along the extension of the axis, the first length is smaller than the second length; the first diameter is smaller than the second diameter. A plurality of helical flutes and a plurality of helical lands, which are provided circumferentially alternatively with respect to each other, extending from the drill tip to the drill shank.
Implementation Method 2
The helical flutes and helical lands provide a rounded margin, which is configured to reduce the overall friction between the drill bit and surrounding bone. In another embodiment, the multi-diameter drill bit includes a parabolic flute, which provides enhanced debris removal and deeper drilling capabilities.
Implementation Method 3
During the drilling procedures, some temperature rises are due to friction of the drill in contact with surrounding bone tissue, such as bone walls or bone fragments. If the bone temperature is higher than 47°C for 1 minute, human bone cells will show damage, necroses, apoptoses and be replaced by connective tissue.
Data Source
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AI summary
A multi-diameter drill bit for implant bed preparation is provided. The drill bit has a drill shank that can be coupled with a driving tool to transfer drilling torques and forces to a drill body distal to the drill shank and a drill tip distal to the drill body. The drill body is divided into a first cylindrical portion having a first diameter and a second cylindrical portion having a second diameter. The drill tip is connected to the first cylindrical portion of the drill body and defines multiple first land areas and multiple cutting lips each at least partially bordering a respective first land areas. The second diameter is greater than the first diameter to define a plurality of faces of second lands at the interface between the first cylindrical portion and the second cylindrical portion, for reducing friction between the drill bit and surrounding bone tissue.