Frustum-Shaped Bone Implant for Low-Quantity Tissue Regrowth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for forming new bone tissue, particularly in cases where bone tissue is in very small quantities, such as in cancer patients or those with multiple interventions, face challenges in maximizing contact area and effectively utilizing fibrocartilage callus for bone regrowth.
Innovation Solution
A device with a frustum-shaped lower portion and cylindrical upper portion, made from titanium alloy or chrome-cobalt molybdenum alloy powder, is inserted into the medullary canal to facilitate the formation of periosteal and endosteal callus, promoting bone regrowth through a porous surface and advantageous callus development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cement-free prostheses are used to maximize contact area between prosthesis and bone, then osseointegration is improved, but the available bone tissue quantity is insufficient in major disaster cases
Solution Approach 1:
The device employs a nested structure where an inner core element is inserted into the medullary canal and an outer cage structure is positioned externally, with both components working together to achieve stable fixation. This nested configuration allows the prosthesis to function effectively even when bone quantity is severely reduced, as each nested component contributes to the overall mechanical stability and bone regeneration support.
Solution Approach 2:
The prosthesis is divided into distinct functional segments: an inner core element for medullary canal insertion and an outer cage structure for peripheral bone support. This segmentation allows each component to be optimized for its specific function - the core provides internal structural support while the cage facilitates external bone growth and stabilization, thereby achieving reliable fixation despite limited bone availability.
2Strength
If the area of contact between prosthesis and bone is maximized, then mechanical stability is improved, but the formation of fibrocartilage callus is compromised in low bone quantity scenarios
Solution Approach 1:
The device applies local quality by creating different contact conditions in different regions: the inner core element provides localized structural support within the medullary canal, while the outer cage structure creates specific zones for fibrocartilage callus formation at the bone interface. This localized differentiation allows mechanical stability and biological healing processes to occur simultaneously without compromising either function.
3Adaptability or versatility
If prostheses are designed for major disasters with very reduced bone tissue, then adaptability to severe cases is improved, but the complexity of the device increases
Solution Approach 1:
The nested prosthesis design achieves universality by being capable of functioning in both severe bone loss scenarios and standard replacement cases. The same basic nested structure can be applied across different anatomical locations and severity levels, providing adaptable support while maintaining a relatively simple overall design that does not require completely different configurations for different clinical situations.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A device (1) for facilitating the formation of new bone tissue, which comprises a body that defines an upper portion (2) and a lower portion (3), the lower portion (3) having a substantially frustum-like shape, the upper portion (2) having a substantially cylindrical shape, the lower portion being adapted to be inserted into the medullary canal of a bone.