Bone Adhesive Application Device Low Surface Energy
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Solution Overview
Problem
Conventional bone adhesives face challenges with poor handling, adhesion to undesirable surfaces, and contamination issues, leading to reduced adhesive strength and mechanical properties during bone repair procedures.
Innovation Solution
A bone adhesive application device with a pliable or rigid structure featuring a low surface energy application surface to minimize adhesion, allowing for improved handling and manipulation of the adhesive without direct contact, and a method using a reactive biocompatible polyurethane material for enhanced bonding with bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polymeric bone adhesives are applied in liquid state to provide chemical adhesion, then adhesive strength is improved, but adhesion to undesirable surfaces (gloves, instruments, containers) increases making handling difficult
Solution Approach 1:
A release liner or barrier layer is introduced between the bone adhesive and undesirable surfaces (gloves, instruments, containers) to prevent unwanted adhesion. This intermediary allows the adhesive to be handled and applied without sticking to surrounding elements, while maintaining its adhesive properties for bonding to bone.
2Ease of operation
If conventional liquid solutions (saline, blood, fat) are used to reduce adhesion to instruments, then handling is improved, but adhesive strength at the bone interface is reduced
Solution Approach 1:
Instead of using liquid solutions that compromise adhesive strength, a solid release liner or barrier layer is used as an intermediary. This solid barrier provides handling ease without introducing liquids that would interfere with the chemical adhesion mechanism at the bone interface.
3Shape
If bone adhesive is applied while liquid to allow shaping, then molding capability is improved, but adhesion to application surfaces increases causing contamination
Solution Approach 1:
A release liner serves as a barrier between the liquid bone adhesive and application surfaces during the molding process. This allows the adhesive to be shaped and molded while preventing adhesion to and contamination from the application tooling, maintaining both molding capability and cleanliness.
4Ease of operation
If adhesion to application surfaces is reduced using liquid solutions, then release from instruments is improved, but mechanical properties are degraded due to contamination
Solution Approach 1:
A solid release liner provides a clean barrier that enables easy release from instruments without introducing liquid contaminants. This maintains the mechanical properties of the cured bone adhesive by preventing contamination during the release process, unlike liquid solutions that can degrade mechanical strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces adhesion to the application device, enables easier shaping and application of the adhesive, prevents contamination, and enhances the cohesive strength of the bond between the adhesive and bone, resulting in improved handling and surgical efficiency with reduced operating room time and cost savings.
Implementation Method 1
The application surface has a surface energy substantially equal to or less than a surface energy of the bone adhesive to reduce adhesion between the bone adhesive and the bone adhesive application device
Data Source
AI summary
A bone adhesive application device has a pliable structure with an application surface upon which a bone adhesive may be applied. The application surface has a surface energy substantially equal to or less than a surface energy of the bone adhesive to reduce adhesion between the bone adhesive and the bone adhesive application device. The bone adhesive application device may be included in a kit for repairing bone defects having a bone adhesive formed from a reactive biocompatible polyurethane material. The bone adhesive may be applied to a bone defect by positioning the pliable structure over at least a portion of the bone defect, delivering the bone adhesive to the bone defect and removing the pliable structure from the bone adhesive.