Ball-Joint Cutting Guide for Fast, Stable Bone Resection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cutting guides for bone resection, such as in total shoulder arthroplasty, are cumbersome and time-consuming to adjust, limiting flexibility and accuracy, and lack efficient integration with computer-assisted surgical systems.
Innovation Solution
A cutting guide with a ball-joint coupling mechanism and quick release mechanism, allowing for precise and rapid adjustment of the cutting slot, and integration with a computer-assisted surgical system for enhanced tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple screws are used to adjust and secure the cutting slot position, then the cutting guide can be secured to the bone, but the adjustment process becomes cumbersome and time-consuming
Solution Approach 1:
The cutting guide is divided into modular components: a body portion that attaches to the bone, and a cutting slot assembly that can be independently adjusted and secured. This segmentation allows the cutting slot to be positioned and locked without requiring multiple separate screw operations, reducing adjustment time while maintaining secure attachment.
Solution Approach 2:
The cutting slot assembly incorporates a dynamic adjustment mechanism with a single screw that allows for quick positioning followed by secure locking. The mechanism transitions from a movable state during adjustment to a fixed state during use, enabling fast repositioning while maintaining reliability during the cutting procedure.
2Stability of the object's composition
If multiple screws are used to adjust the cutting slot, then positional stability can be achieved, but the range of motion during adjustment is limited
Solution Approach 1:
The cutting slot assembly uses a dynamic locking mechanism where a single screw provides both adjustment capability and positional stability. During adjustment, the cutting slot can be freely repositioned within a wide range; once positioned, the screw locks it securely, achieving both adaptability and stability with a single component.
Solution Approach 2:
The single adjustment screw serves multiple functions: it acts as both a positioning tool during adjustment and a locking mechanism for securing the position. This multi-functional design eliminates the need for separate adjustment and locking screws, providing full range of motion during setup while ensuring stable fixation during use.
3Ease of operation
If free-hand technique is used for resection, then surgical flexibility is maintained, but precision and accuracy of the planar cut are reduced
Solution Approach 1:
The cutting guide serves as an intermediary device between the surgeon's intent and the actual cutting action. It provides a physical reference frame with a precisely positioned cutting slot that guides the saw blade, ensuring accurate planar cuts while allowing the surgeon to maintain operational flexibility through easy adjustment of the guide's position and orientation.
Data Source
AI summary
A cutting guide for resecting a portion of a patient's bone such as, for example, a humeral head of a patient's humerus. The cutting guide including a body component, a cutting slot component including a cutting slot configured to receive a cutting instrument for resecting the portion of the patient's bone, a ball-joint coupling or clamping mechanism for coupling the cutting slot component to the body component, and a quick release mechanism moveable between a first position and a second position. In the first position, the release mechanism applies a clamping or spring force on the ball-joint coupling or clamping mechanism to inhibit movement of the cutting slot component relative to the body component. In the second position, the release mechanism releases the clamping or spring force on the ball-joint coupling or clamping mechanism so that the cutting slot component can be moved (e.g., rotated) relative to the body component.