Modular Glenoid Reamer with Interchangeable Cutting Heads
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Solution Overview
Problem
Current glenoid reamers lack adaptability and interchangeability, making it difficult for surgeons to prepare bone surfaces for various implant geometries and anatomies, and are often complex and difficult to assemble and disassemble.
Innovation Solution
A modular reamer system with a flexible design that allows for easy assembly and disassembly, featuring a locking collar and adjustable axis of rotation, enabling the use of multiple implant geometry angles and facilitating intuitive operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-axis cutting head is used in existing glenoid reamers, then the reamer can maintain a simple structure, but it cannot adapt to different implant geometries and anatomies requiring multiple axes of rotation
Solution Approach 1:
The reamer is divided into modular components: a base tool and interchangeable cutting heads. Each cutting head is designed for a specific axis of rotation and implant geometry. This segmentation allows surgeons to select the appropriate cutting head without carrying multiple complete reamer systems, thus improving adaptability while keeping individual components relatively simple.
Solution Approach 2:
The base tool is designed as a universal platform that can accommodate multiple types of cutting heads with different axes of rotation. The standardized interface and mounting mechanism allow a single base tool to perform multiple functions by simply changing the cutting head, resolving the contradiction between versatility and complexity.
2Adaptability or versatility
If multiple complete reamer systems are provided for different implant geometries, then adaptability is improved, but device complexity and the number of components to manage increases
Solution Approach 1:
Instead of providing multiple complete reamer systems, the invention provides one universal base tool that can accept various cutting heads. This universality reduces the total number of systems from many complete reamers to a single modular system, improving adaptability while reducing complexity.
Solution Approach 2:
The system is segmented into a common base tool and specialized cutting heads. This segmentation allows the complex adaptive functionality to be distributed across interchangeable components rather than requiring multiple complete systems, making the overall system more manageable and less complex.
3Ease of operation
If existing reamers are designed for easy assembly and disassembly, then ease of operation is improved, but reliability and consistent use may be compromised
Solution Approach 1:
The modular design with standardized interfaces allows for easy assembly and disassembly of cutting heads on the base tool. The segmentation creates natural break points that simplify manipulation while maintaining connection integrity through precision-engineered mating surfaces.
Solution Approach 2:
The universal mounting mechanism designed for easy operation incorporates features like standardized interfaces and simple attachment/detachment procedures. This universality ensures that the same reliable connection method is used across all cutting heads, maintaining consistency while enabling ease of operation.
Data Source
AI summary
Reamer instruments and related methods are disclosed for use in preparing bone, such as a glenoid bone surface, to receive an implant requiring one of two or more possible surface geometries. Described reamer instruments can have a modular or multi-component design. A minimal number of components can be particular to a particular required geometry, which can allow assembly and use of reamer instruments of the present disclosure to be flexible, intuitive, and efficient. In some embodiments, a disposable reamer head assembly can be driven by a disposable drive tip through a pin-on-pin connection. The remaining components of the reamer instrument can be sterilized and re-used. To prepare bone for a half-wedge implant, a half-wedge housing can be coupled to a reamer instrument handle and a depth stop can be coupled to the housing to achieve the required geometry. Alternatively, a full-wedge housing can be coupled to the instrument handle.