Subchondral Joint Treatment Instruments
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Solution Overview
Problem
Current surgical treatments for joint osteoarthritis, particularly near the peripheral articular surface, face challenges in precisely targeting and treating subchondral defects due to the joint's natural topography and limited access area, leading to inconsistent pain relief and structural damage.
Innovation Solution
The development of specialized instruments and methods for subchondral treatment, including drilling access to the subchondral region without violating the articular surface, using a beveled drill bit and cannula for precise injection of bone hardening materials, and sealing the hole with a plug to maintain structural integrity and promote healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional surgical approaches are used to treat subchondral defects near the peripheral articular surface, then the treatment can be performed with standard instrumentation, but precise targeting and controlled delivery of treatment materials are compromised due to the joint's natural topography and limited access area
Solution Approach 1:
A guide instrument is introduced as an intermediary device that bridges the gap between the surgeon's access point and the difficult-to-reach subchondral defect. The guide instrument includes a guide body with a guide bore that directs treatment materials precisely to the defect site, overcoming the limitations of direct access while maintaining surgical control and precision.
Solution Approach 2:
The guide instrument is designed with a curved or angled configuration that allows it to navigate around the joint's natural topography. By changing the dimensional approach (using a curved path instead of a straight line), the instrument can reach peripheral subchondral defects that are otherwise inaccessible through conventional direct access methods.
2Ease of operation
If the articular surface is violated to access the subchondral region, then direct access to the subchondral defect is achieved, but the structural integrity and protective function of the articular surface are compromised
Solution Approach 1:
The guide instrument serves as a mediator that enables access to the subchondral region without requiring violation of the articular surface. Through the guide bore, treatment materials can be delivered to the subchondral defect while the articular surface remains intact and continues to perform its protective function.
Solution Approach 2:
The treatment approach is segmented into two distinct pathways: the guide instrument delivers materials through a separate access point that does not compromise the articular surface, while the subchondral defect is treated through this indirect route. This segmentation allows simultaneous preservation of articular integrity and effective subchondral treatment.
3Productivity
If bone hardening materials are injected directly into the subchondral defect without precise delivery control, then the defect can be treated, but the materials may disperse improperly or leak, reducing treatment effectiveness and potentially causing harm
Solution Approach 1:
The guide bore acts as an intermediary delivery channel that confines and directs bone hardening materials precisely to the subchondral defect. This controlled pathway prevents material dispersion and leakage, ensuring that the full dosage is delivered accurately to the target site while maintaining treatment efficiency.
Solution Approach 2:
The guide instrument provides localized control over material delivery, ensuring that bone hardening materials are deposited precisely where needed in the subchondral defect. This localized delivery approach enhances treatment reliability by preventing material migration to surrounding healthy tissue while maintaining high treatment efficiency.
Data Source
AI summary
Disclosed in some embodiments are instruments and associated methods for the subchondral treatment of defects near a peripheral articular surface of a joint.