Porous PMMA Space Maintainer for Bone Void Reconstruction
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Solution Overview
Problem
Current methods for treating traumatic bone injuries face challenges with contracture and scarring of soft tissues, delayed bone reconstruction, and complications such as wound infections, especially in hostile wound environments, due to limitations in existing tissue engineering approaches and alloplastic implants like solid PMMA.
Innovation Solution
A bone reconstruction system using a porous polymethylmethacrylate (PMMA) space maintaining composition with an osseous generating construct, allowing for controlled porosity and bioactive factor release, to promote wound healing and tissue regeneration while preventing soft tissue collapse and infection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid PMMA is used as a space maintainer, then the space is effectively maintained and the implant is mechanically strong, but wound healing is compromised and infection risk increases
Solution Approach 1:
The patent applies porous PMMA material to replace solid PMMA, creating interconnected pores that allow tissue ingrowth and vascularization. This porous structure maintains mechanical strength while enabling wound healing by facilitating tissue integration and reducing infection risk through tissue penetration.
Solution Approach 2:
The patent uses composite materials combining PMMA with other substances to create a space maintainer that兼具 mechanical strength and biocompatibility. The composite structure allows for both structural support and enhanced wound healing capabilities.
2Loss of time
If immediate reconstruction is performed, then treatment time is reduced, but soft tissue contracture and scarring compromise the repair quality
Solution Approach 1:
The patent applies preliminary action by placing a space maintainer immediately after trauma to prevent soft tissue contracture and scarring. This preliminary device maintains the space and prepares the wound bed, allowing for high-quality definitive reconstruction at a later time when soft tissue conditions are optimal.
Solution Approach 2:
The patent segments the reconstruction process into two stages: immediate space maintenance with a porous PMMA device, followed by delayed definitive reconstruction. This segmentation allows each stage to be optimized independently, ensuring both time efficiency and repair quality.
3Ease of manufacture
If alloplastic implants are used for space maintenance, then the procedure is simple and familiar to surgeons, but local complications and wound infection rates increase
Solution Approach 1:
The patent transforms traditional solid alloplastic PMMA into a porous form that maintains surgical simplicity while dramatically reducing infection rates. The porous structure allows tissue ingrowth, integrating the implant with surrounding tissues and preventing the bacterial accumulation that occurs with solid implants.
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 system effectively maintains bone voids, promotes soft tissue coverage and healing, and facilitates definitive bone reconstruction by allowing for controlled tissue integration and bioactive factor delivery, reducing infection risks and improving wound healing outcomes.
Implementation Method 1
a space maintaining composition comprising porous polymethylmethacrylate; wherein the porosity of the space maintaining composition is from about 10% to about 50%
Implementation Method 2
an osseous generating construct comprising a polymethylmethacrylate chamber that comprises one or more osseous generating materials
Data Source
AI summary
Systems, methods and compositions useful for treatment of traumatic bone injuries are provided. In one embodiment, a bone reconstruction system comprising a space maintaining composition comprising porous polymethylmethacrylate; and an osseous generating construct comprising a polymethylmethacrylate chamber that comprises one or more osseous generating materials is provided. Associated compositions and methods are also provided.