Disposable Bone Reamer With Center Drill for Single-Step Bore Prep
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Solution Overview
Problem
Current bone reamers are costly, time-consuming to manufacture, prone to dullness and contamination, require multiple steps for preparation, and do not easily assess cutting efficiency, leading to potential surgical complications and increased costs due to varying surgeon preferences and kit complexity.
Innovation Solution
A disposable bone reamer with a novel blade and adjustable outer profile design, allowing for simultaneous reaming and drilling in one step, featuring a shaft, removable members for customizable shape, and a center drill bit for precise bore hole creation, reducing manufacturing costs and minimizing tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional reamer cutting heads are manufactured using intricate precision machining techniques, then manufacturing precision is improved, but manufacturing time and cost increase
Solution Approach 1:
The reamer cutting head is divided into separate components: a reusable hub and disposable cutting inserts. The cutting inserts are manufactured using simpler, more cost-effective processes while the hub is precision-machined once and reused. This segmentation allows low-precision components to be made cheaply while maintaining overall precision through the reusable hub.
Solution Approach 2:
The invention uses disposable cutting inserts that replace the traditional permanent cutting head. These inserts are made from cheaper materials and simpler manufacturing processes, eliminating the need for expensive, time-consuming precision machining of the entire reamer head, while maintaining sufficient precision for the surgical application.
2Ease of manufacture
If reamer cutting heads are reused multiple times, then cost is reduced, but reliability deteriorates due to blade dullness and contamination
Solution Approach 1:
The reamer is segmented into a reusable hub and disposable cutting inserts. The hub maintains sterility and structural integrity through reuse, while the cutting inserts are discarded after single use to ensure sharpness and eliminate contamination risks. This resolves the contradiction by allowing the expensive hub to be reused while the critical cutting elements are replaced.
Solution Approach 2:
The cutting inserts are designed as disposable, single-use components that are discarded after one application. This ensures that each insert is always sharp and sterile, eliminating the reliability issues associated with reusing cutting blades, while the reusable hub amortizes the cost over multiple procedures.
3Manufacturing precision
If a wide array of reamer sizes is maintained to achieve close prosthetic fit, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The reusable hub is designed with a standardized interface and geometry that can accept multiple types of cutting inserts with different diameters. This universal hub design allows a single hub to perform multiple functions across different reamer sizes, reducing the total number of unique components needed while maintaining precision for various bore diameters.
Solution Approach 2:
By separating the size-specific cutting inserts from the universal hub, the system reduces complexity in the reusable components while maintaining the full array of sizes needed for precision fitting. The inserts are simple, single-use elements that vary only in diameter, eliminating the need for complex precision machining of multiple complete reamer assemblies.
4Manufacturing precision
If multiple reaming steps are performed sequentially, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The invention merges multiple reaming functions into a single tool by providing the hub with multiple cutting inserts of different diameters that can be quickly exchanged. This allows a surgeon to perform multiple reaming operations with different precision requirements in sequence without removing the hub, significantly reducing surgical time while maintaining the precision benefits of multiple steps.
Solution Approach 2:
The reamer system is designed to be dynamically reconfigurable during surgery, allowing the cutting inserts to be quickly changed on the hub to match different surgical requirements. This dynamic adaptability enables precise bone preparation for various implant sizes without requiring multiple separate tools or lengthy setup procedures.
Data Source
AI summary
A bone reamer includes a shaft having a first and a second end. The second end is configured to connect to a rotating power source. A head of the reamer includes a rear face connected to the first end of the shaft, a cutting face on an opposing side of the head relative to the rear face, and a perimeter portion having an inner perimeter diameter and an outer perimeter diameter. The outer perimeter diameter defines outer boundaries of the rear face and the cutting face. A blade member of the reamer is disposed upon the cutting face and extends at least across the inner perimeter diameter of the perimeter portion. A center drill bit is disposed on the cutting face. The drill bit and cutting blade are concentric about a center axis of the reamer.