Standalone Interbody Implants with Integrated Fixation Inserts
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Solution Overview
Problem
Existing intervertebral spacer devices made from non-metallic materials like PEEK are insufficiently strong to support fixation elements, and traditional plates used for spinal stabilization can obstruct anatomy and require complex anterior approaches, necessitating a solution that provides strong fixation without protruding anteriorly and allows for natural spinal movement.
Innovation Solution
The development of stand-alone interbody fusion implants comprising a spacer with integrated inserts or members that enhance strength, featuring apertures for fixation elements and a design that minimizes anterior profile, using biocompatible materials like titanium to simulate bone elasticity and promote vertebral fusion while allowing for natural spinal motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spacer is made from non-metallic materials like PEEK, then the spacer is biocompatible and promotes fusion, but the spacer is insufficiently strong to support fixation elements
Solution Approach 1:
The invention uses composite construction by integrating inserts made of strong materials (metal or ceramic) within a biocompatible spacer matrix (PEEK or other polymers). The inserts provide the necessary mechanical strength to support fixation elements like screws, while the biocompatible matrix ensures physiological compatibility and promotes bone fusion. This composite approach resolves the contradiction by combining materials with complementary properties.
2Strength
If traditional plates are used for spinal stabilization, then fixation is provided, but the profile becomes obstructive to the anatomy and requires complex anterior approaches
Solution Approach 1:
The invention merges the functions of the spacer and the fixation plate into a single integrated device. The fixation elements (screws, staples, or pins) are directly incorporated into the spacer structure itself, eliminating the need for a separate anterior plate. This integration maintains strong fixation capability while removing the obstructive anterior profile, allowing for simpler surgical approaches and reduced anatomical interference.
3Shape
If fixation elements are integrated directly into the spacer, then profile is minimized, but the spacer material must be sufficiently strong
Solution Approach 1:
The spacer employs composite construction with inserts made of strong materials (metal or ceramic) embedded within a biocompatible matrix (PEEK or other polymers). The inserts provide the necessary mechanical strength to support fixation elements like screws, while the biocompatible matrix ensures physiological compatibility and promotes bone fusion. This composite approach resolves the contradiction by combining materials with complementary properties.
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 2A~2B
AI summary
Stand-alone interbody fusion devices for engagement between adjacent vertebrae. The stand-alone interbody fusion devices may include a spacer and one or more inserts or members coupled to the spacer. The inserts or members may be configured and designed to provide the apertures which are designed to retain bone fasteners, such as screws, and secure the implant to the adjacent vertebrae.