Personalized Gene-Activated Implant for Bone Regeneration
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Solution Overview
Problem
Current bone substitutes are inefficient for treating large bone defects due to inability to precisely match the shape and size of the defect, leading to insufficient consolidation and high complication rates, and existing gene-activated substitutes have limited osteoinductive action due to low transfection efficiency and short-lived growth factors.
Innovation Solution
A personalized gene-activated implant is created using 3D printing to exactly match the shape and size of the bone defect, combined with biologically active gene constructions and optional fixation elements, ensuring tight adherence and efficient delivery of nucleic acids for enhanced osteoinductive action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bone substitutes are used to treat large bone defects, then bone reconstruction is attempted, but the substitutes cannot precisely match the shape and size of the defect, leading to insufficient consolidation and high complication rates
Solution Approach 1:
The patent applies 3D printing technology to manufacture bone substitutes with customized geometric parameters that precisely match the patient's specific bone defect. The 3D printing process enables control over dimensions, shape, and internal structure parameters, allowing the implant to be tailored to the exact contours and volume of the defect site, thereby achieving both high manufacturing precision and reliable consolidation
Solution Approach 2:
The bone substitute is designed with a segmented porous structure that can be customized to match the complex geometry of bone defects. The porous framework is divided into interconnected struts and spaces that can be optimized for different regions of the defect, allowing precise adaptation to irregular shapes while maintaining structural integrity for reliable consolidation
2Productivity
If gene-activated substitutes are used to enhance osteoinductive action, then bone regeneration is promoted, but transfection efficiency is low and growth factors have short lifespan, limiting effectiveness
Solution Approach 1:
The patent creates a composite bone substitute combining multiple functional components: osteoinductive growth factors (such as BMP-2), osteoconductive ceramic materials (such as hydroxyapatite or beta-tricalcium phosphate), and osteogenic living cells. This composite structure allows synergistic interaction between components, where the ceramic provides structural support and sustained growth factor release, while living cells enhance transfection efficiency and proliferation, overcoming the limitations of short-lived growth factors alone
Solution Approach 2:
The patent pre-loads the 3D printed scaffold with growth factors and/or living cells before implantation. This preliminary action ensures that osteoinductive factors are already positioned within the implant structure, ready to act immediately upon implantation. The scaffold is pre-conditioned with appropriate concentrations of BMPs or other growth factors, and/or pre-seeded with osteogenic cells, eliminating the need for separate delivery steps and ensuring reliable and efficient osteoinductive action from the outset
3Reliability
If autogenous bone grafting is used to treat large bone defects, then bone continuity can be reconstructed, but the procedure causes further injury, increases surgery time, and has high complication rates
Solution Approach 1:
The patent creates a synthetic bone substitute that copies the essential functional and structural properties of autogenous bone without requiring harvesting from a donor site. The 3D printed implant replicates the trabecular architecture and compositional characteristics of natural bone, providing equivalent mechanical support and osteoinductive capabilities. This copying approach eliminates the need for complex donor site surgery, vascular anastomosis procedures, and extended operative time, while achieving reliable bone continuity reconstruction
Data Source
AI summary
Provided is a method for construction of bone substitutes efficient in the repair of large bone defects. The method for constructing such medical products includes three-dimensional printing of a bioresorbable scaffold and its activation by gene constructions. Produced medicinal products may serve as an efficient alternative to bone autografts.