Orthopedic Drill Tip Geometry for Stable Angled Bone Entry
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Solution Overview
Problem
Conventional orthopedic drill bits tend to move during use, causing damage, heat, and trauma to tissues like bone and cartilage, especially in complex surgical procedures, due to their design and inability to maintain a stable position.
Innovation Solution
The development of cutting elements with specific tip geometries, such as conical tips and shafts with flutes and gashes, that allow for positioning at varying angles relative to the surface, reducing slippage and guiding debris away from the cutting location, thereby enhancing control and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional drill bits with pyramidal shaped ends are used, then the drill bit can engage the material to be cut, but the drill bit tends to move during drilling operations
Solution Approach 1:
The cutting tip is segmented into multiple cutting surfaces (first cutting surface, second cutting surface, third cutting surface) with distinct orientations. Each surface engages the bone at different angles, providing multi-directional control and preventing slippage that occurs with conventional single-geometry tips.
Solution Approach 2:
The cutting surfaces are designed with asymmetric geometry where each surface has a different orientation angle relative to the drill bit axis. The first cutting surface is oriented at a first angle, the second at a second angle, and the third at a third angle, creating an asymmetric configuration that enhances grip and control on the bone surface.
2Adaptability or versatility
If conventional drill bits are used in complex surgical procedures, then the surgical team can work in confined spaces, but the drill bit moves during use posing risks to periosteum and adjacent body parts
Solution Approach 1:
The multi-oriented cutting surfaces are designed to preemptively counteract the slippage tendency of conventional drill bits. By engaging the bone surface from multiple angles simultaneously, the cutting tip creates preliminary resistance against movement before drilling begins, preventing harmful displacement that could damage periosteum and adjacent structures.
Solution Approach 2:
Different cutting surfaces are oriented at different angles to engage specific local regions of the bone surface. This local quality variation allows the drill bit to maintain control in confined surgical spaces while distributing cutting forces across multiple engagement points, reducing the risk of sudden movements that could harm adjacent body parts.
3Manufacturing precision
If drill bits with varying tip geometries are selected, then the ability to bite into material and maintain position can be improved, but the complexity of selection and procedure increases
Solution Approach 1:
The drill bit incorporates multiple cutting surfaces with different orientations within a single tool, making it universally applicable to various drilling scenarios that previously required different specialized bits. The multi-functional tip geometry can engage bone at multiple angles simultaneously, eliminating the need for surgeons to select from multiple different drill bit types while maintaining precision and position control.
Data Source
AI summary
Cutting elements may include points, tips, cutting portions and/or shafts of various geometries depending on requirements of the intended use. Tip geometries described may be used for cutting burrs, k-wires and/or drill bits in many types of applications. In particular, the tip geometries described may be used in medical applications. For example, tip geometries as described herein may be used for drilling bones, cartilage, and similar structures during surgery. Tip geometry may influence cutting ability. Use of the tip geometries described may allow the cutting element to be positioned at varying angles relative to the surface to be cut. In some instances, a tip geometry for a cutting element may be selected such that it reduces and/or inhibits movement of the cutting element during use and/or allows for a predetermined angle of entry into a surface to be cut. Using the designs described herein may reduce and/or inhibit damage, heat, and/or trauma to materials that are to be cut, for example, tissues such as bone and/or cartilage.