Bone Anchor Delivery System with Removable Punch Driver
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bone anchor systems for securing sutures to bone often leave metal fragments or tips in the body during installation, which is undesirable and can cause complications.
Innovation Solution
A bone anchor delivery system with a retractable punch driver assembly and a bone anchor assembly that uses a hollow body with an intermediate lock to expand diametrically, securing the anchor to the bone without leaving metal fragments, and features non-slip suture openings to prevent backsliding, utilizing a synthetic material like PEEK for the components to avoid metal residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stainless steel punch with a steel tip is used to drive the bone anchor, then the bone anchor can be easily driven into the bone, but metal tip fragments are left in the bone opening
Solution Approach 1:
The punch tip is designed to be removable from the bone anchor after installation. The punch shaft can be detached from the bone anchor assembly, allowing the punch tip to be completely extracted from the body rather than being permanently embedded, thus eliminating metal fragment residue while maintaining easy installation capability
Solution Approach 2:
The bone anchor is designed with a compressible body that changes volume during installation. The compressible body allows the punch to be inserted and then removed after the anchor is set in place, changing the physical state of the installation process to enable removal of the punch tip while maintaining secure anchor placement
2Ease of operation
If the suture anchor has a self-driving feature with a steel tip, then the installation is simplified, but the steel tip remains trapped in the bone opening
Solution Approach 1:
The punch shaft is designed to be separable from the bone anchor after installation. The punch can be driven into the bone to install the anchor, then the punch shaft is removed from the bone anchor assembly, completely extracting the steel tip from the body while maintaining the self-driving installation benefit
3Reliability
If the hollow body of the bone anchor expands diametrically to secure the anchor, then the anchor holds sutures reliably, but the structure becomes more complex
Solution Approach 1:
The hollow body of the bone anchor is designed to dynamically change its diameter. It starts in a compressed state for easy insertion, then expands diametrically after installation to secure the anchor in place and hold sutures reliably. This dynamic transformation allows a relatively simple structure to achieve reliable fixation without requiring complex mechanisms
Data Source
AI summary
A bone anchor delivery system device has a retractable punch driver assembly and a bone anchor assembly for attachment onto the punch driver assembly. The punch driver assembly has a retractable punch shaft and a guide for receiving the retractable punch shaft. The punch shaft is linearly movable relative to the guide and the punch shaft having an extended length with bone penetrating tip at a first end. The bone anchor assembly has a bone anchor having a hollow body, a punch, an intermediate lock. The intermediate lock is stowed at a distal end portion inside the hollow body of the bone anchor near a proximal end of the punch and when moved toward a proximal end of the bone anchor the intermediate lock moves inside and expands the hollow body diametrically increasing in size to secure the bone anchor to a bone opening.