Custom Bone Resection Template with Cross-Joint Tool Guide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bone resection techniques for knee joint surgery are complex, time-consuming, and prone to errors due to the need for extensive adjustments and measurements, which can lead to prolonged surgery times, increased risk of complications, and suboptimal ligament tension adjustments, especially in arthritic joints where ligament structures are affected.
Innovation Solution
A device with a tool guide and support system that allows for precise cross-jointed adjustment and positioning of the tool guide outside or adjacent to the surgical area, using 3D reconstruction templates made from materials like polyamide, which enable exact resection and ligament tension control, reducing the need for extensive intraoperative adjustments and improving biomechanical alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional templates and implantation aids are used for bone resection, then the surgical procedure can be performed, but the device complexity increases and requires extensive adjustments and measuring steps
Solution Approach 1:
The device is divided into a support element that attaches to the bone and a tool guide element that guides the cutting tool. These elements can be separate or integrated, allowing flexible configuration that reduces overall complexity while maintaining resection precision.
Solution Approach 2:
The support element is pre-adjusted to the patient's bone structure before surgery using CT or MRI data. This preliminary adaptation eliminates the need for extensive intraoperative adjustments, reducing device complexity while ensuring reliable precise resection.
2Manufacturing precision
If extensive adjustments and measuring steps are performed during surgery, then precise bone resection can be achieved, but the surgery time increases
Solution Approach 1:
All necessary measurements and adjustments of the support element to the bone are completed before surgery using pre-operative imaging data. During surgery, the device is simply positioned and fixed, dramatically reducing surgery time while maintaining high resection precision through the pre-planned geometry.
Solution Approach 2:
The support element is created as a digital copy or model of the patient's actual bone structure from CT or MRI scans. This virtual model allows precise pre-planning of resection geometry without requiring time-consuming physical measurements during surgery.
3Reliability
If traditional implantation aids are used, then bone resection can be performed, but the ease of operation decreases due to extensive training and concentration required
Solution Approach 1:
The device uses a digital copy of the patient's bone structure from pre-operative imaging to create a customized support element. This eliminates the need for surgeons to perform complex mental calculations and measurements during surgery, making the procedure easier to execute while maintaining high accuracy through the pre-planned digital model.
Solution Approach 2:
Complex mechanical measurement and adjustment procedures are replaced by a pre-fabricated support element with built-in geometric constraints that automatically ensure accurate resection. The device translates pre-operative digital planning into physical guidance without requiring intricate intraoperative mechanical adjustments.
4Manufacturing precision
If pre-operative imaging and virtual planning are performed, then the manufacturing precision of endoprosthesis can be improved, but the loss of time in the overall process increases
Solution Approach 1:
A digital copy of the patient's bone structure is created from pre-operative CT or MRI scans. This virtual model enables precise planning of both the bone resection geometry and the custom endoprosthesis design, ensuring optimal fit while allowing parallel processing of device fabrication and surgical scheduling to mitigate time delays.
Solution Approach 2:
All planning, measurement, and design work is completed before surgery using pre-operative imaging. The support element and endoprosthesis are manufactured in advance based on this preliminary work, so that during surgery only simple positioning and fixation are needed, effectively distributing the time investment away from the surgical procedure itself.
Data Source
AI summary
The present invention refers to a device for the resection of bones (1) for preparing the attachment of an endoprosthesis to the joints which consists of at least two joint elements cooperating with each other, comprising at least one tool guide (3, 4, 5, 7, 14) and at least one support (6, 9, 10, 15, 21) suitable for orienting the at least one tool guide (3, 4, 5, 7, 14), wherein, either in the immediate vicinity of the joint and/or across joints, the at least one support (15, 21) enables the at least one tool guide (3, 4, 5, 7, 14) to be oriented and positioned on a further joint element, or enables the at least one tool guide (3, 4, 5, 7, 14) to be oriented and positioned at the same joint element distally to the area to be treated and/or outside the surgical area. The at least one tool guide (3, 4, 5, 7, 14) and the at least one support are preferably immovably connected to each other so as to manufacture an individual single-use template. The invention also relates to a method for manufacturing such a device or template, an endoprosthesis suited for this purpose, a method for manufacturing such an endoprosthesis, and a surgical set consisting of said parts.