Radial Strut Bone Cutter for Hip Reaming
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Solution Overview
Problem
Traditional acetabular reamers used in orthopedic surgery are difficult to manufacture, costly, and prone to contamination due to their complex design, which affects their structural rigidity and accuracy during hip joint procedures.
Innovation Solution
A bone cutter with a design featuring a plurality of spaced struts radiating from an apex to a base, providing structural rigidity while minimizing material usage, and incorporating cutting teeth and optional shields to enhance precision and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional reamers are constructed with a hemispherical cup-like shape and multiple cutting surfaces, then structural rigidity and cutting precision are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The reamer is divided into multiple discrete struts radiating from an apex, each strut being a separate structural element. This segmentation allows each strut to be manufactured independently and assembled together, reducing overall manufacturing complexity while maintaining the hemispherical shape and structural rigidity through the radial arrangement of struts.
Solution Approach 2:
The invention transitions from a traditional solid hemispherical cup design to a radial strut arrangement that utilizes three-dimensional spatial distribution. The struts are positioned at different radial distances and angles, creating a lightweight yet rigid structure that achieves the required mechanical properties without the manufacturing complexity of traditional solid hemispherical reamers.
2Manufacturing precision
If traditional reamers are made with precise cutting surfaces on a curved shell, then cutting precision is improved, but the difficulty of cleaning and sterilization increases
Solution Approach 1:
The cutting surfaces are segmented and positioned on individual struts rather than on a continuous curved shell. This segmentation creates discrete cutting edges that are easier to access, clean, and sterilize compared to the continuous curved surfaces of traditional reamers, while still maintaining precise cutting capability through the radial arrangement of struts with cutting surfaces.
3Ease of manufacture
If single use cutting tools are used, then ease of cleaning and sterilization is improved, but structural rigidity decreases
Solution Approach 1:
The reamer uses multiple thin struts arranged radially to create a structure that is both lightweight and rigid. This segmented construction allows the tool to maintain structural integrity without requiring a thick, complex shell, thereby reducing material usage and cost while providing sufficient rigidity for precise cutting operations.
Solution Approach 2:
The radial arrangement of struts creates a hemispherical geometry that naturally distributes mechanical loads throughout the structure. This spherical geometry provides inherent structural rigidity through geometric stability, allowing the use of minimal material while maintaining the required strength for cutting operations.
4Strength
If additional support substrate is added to reinforce the cutting tool, then structural rigidity is improved, but the amount of material and manufacturing complexity increase
Solution Approach 1:
The radial strut arrangement creates a hemispherical structure that utilizes geometric shape to provide structural rigidity. The spherical geometry naturally resists deformation through its form, eliminating the need for additional support substrates or reinforcement materials. The struts themselves are positioned to optimize structural strength while minimizing material usage.
Data Source
AI summary
An orthopedic bone cutter for cutting bone and tissue is described. The cutting device comprises a plurality of radially extending struts that form a frame to which a base is connected thereto. Each of the struts that form the frame comprise sidewalls having left and right sidewall portions that are positioned at an angular relationship with respect to a primary strut sidewall portion. A plurality of cutting teeth reside along each of the struts have a tissue cutting surface that is raised above the exterior strut surface. The base of the orthopedic bone cutter may comprise a cross bar or bar and boss interface which secure bone cutter to a drive shaft.