Bone Implant Mesh Deployment Kit for Defect Conformability
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Solution Overview
Problem
Conventional bone grafts and implants face challenges such as limited customization, migration from the surgical site, and inadequate mechanical support due to their solid and non-conforming shapes, leading to suboptimal healing and integration with the bone.
Innovation Solution
A kit comprising dilators and a bone implant with a mesh material that can be deployed and fixed at the surgical site using a dilator system, preventing migration and enhancing integration through a mesh structure that allows for customization and improved mechanical support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional solid bone grafts or implants are used, then structural integrity is provided, but the implant cannot conform to the irregular shape of the bone defect and may migrate from the surgical site
Solution Approach 1:
The patent employs a mesh implant made of flexible material that can be contorted and molded to precisely fit the irregular geometry of the bone defect. The mesh structure's flexibility allows it to conform to complex shapes while maintaining structural integrity, preventing migration from the surgical site through custom contouring that interlocks with the underlying bone architecture.
Solution Approach 2:
The mesh implant transitions from a rigid, pre-formed state to a flexible, moldable state during surgery, allowing dynamic adaptation to the specific defect geometry. This dynamic property enables the implant to be shaped intraoperatively to match the unique contours of each patient's bone defect, ensuring optimal fit and stability.
2Strength
If metal implants are used to provide mechanical support, then strength is improved, but stress shielding occurs leading to decreased bone density around the implant
Solution Approach 1:
The mesh implant utilizes an open-pore structure that allows physiological stress transmission to the surrounding bone tissue. The porous architecture provides mechanical support while permitting stress transfer through the implant-bone interface, preventing stress shielding and promoting bone density maintenance through controlled mechanical loading during the healing process.
Solution Approach 2:
The mesh implant represents a composite solution combining synthetic or biological materials with mechanical properties that bridge the gap between metal strength and bone compliance. This composite structure provides adequate mechanical support while having elastic modulus closer to bone, reducing the stress shielding effect and allowing physiological stress transmission to maintain bone density.
3Adaptability or versatility
If formed implants are used, then the implant structure is complete at implantation, but customization is limited and migration may occur
Solution Approach 1:
The mesh implant is divided into interconnected struts or pores that can be independently positioned and molded during surgery. This segmented structure allows the implant to be custom-shaped by adjusting individual elements to fit the specific defect geometry, while the interconnected network maintains overall structural integrity and prevents migration through distributed mechanical interlocking.
Data Source
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AI summary
A kit (10) for deploying a bone implant (38) at a surgical site is provided. The kit comprises a first sleeve (12) having an interior surface (18) that defines a channel (20), and a second sleeve (22) having an outer surface (30) and an inner surface (32). The inner surface of the second sleeve defines an inner channel (34). The outer surface of the second sleeve is configured to slidably engage the interior surface of the channel of the first sleeve. A bone implant is also provided comprising a mesh material (40). The mesh material is disposed in a portion of the channel of the first sleeve or disposed in a portion of the inner channel of the second sleeve or disposed in both the portion of the channel of the first sleeve and the portion of the inner channel of the second sleeve, such that sliding the outer surface of the second sleeve deploys the bone implant at the surgical site. Bone implants and methods of implantation are also provided.