Minimally Invasive Bunion Correction With Guided Bone Cuts
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Solution Overview
Problem
Current bunion correction surgeries are invasive, painful, and require long recovery times, often causing significant soft tissue damage and inconsistent results due to the use of burrs and drill bits inserted blindly through small incisions.
Innovation Solution
A minimally invasive bunion correction method using a pocket instrument and guided bone cuts, along with a monolithic implant with a head and anchor, secured by screws, and a suture to realign the great toe, minimizing tissue damage and ensuring repeatable results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional invasive bunion correction surgery is performed with burrs and drill bits inserted blindly through small incisions, then bone cuts can be made to correct the deformity, but significant soft tissue damage occurs and results are unrepeatable
Solution Approach 1:
The patent introduces surgical guides and instrumentation systems as intermediaries between the surgeon and the bone. These guides provide precise pathways for burrs and drill bits, ensuring accurate bone cuts while minimizing blind insertion and associated soft tissue damage. The guides act as mediators that translate surgical intent into precise mechanical action.
Solution Approach 2:
The surgical guides and instrumentation are prepared and positioned before the actual bone cutting begins. This preliminary setup establishes precise trajectories and depths for all subsequent bone modifications, ensuring that the corrective action is both accurate and repeatable while minimizing unnecessary tissue disruption.
2Ease of operation
If traditional invasive bunion correction surgery is performed with several inch incisions, then comprehensive access to the surgical site is achieved, but recovery time extends to 10-12 weeks and discomfort is significant
Solution Approach 1:
The patent divides the surgical approach into multiple small incisions rather than one large incision. Each small incision provides targeted access for specific instruments (guides, burrs, drill bits, implant), allowing the surgeon to perform comprehensive corrective work through several minimal openings. This segmentation reduces overall tissue disruption while maintaining surgical capability.
Solution Approach 2:
The surgical approach uses localized small incisions positioned precisely where needed for instrument insertion, rather than a large continuous incision. Each incision is optimized for its specific purpose (guide insertion, implant placement, etc.), providing adequate local access while preserving surrounding tissue integrity and reducing overall surgical trauma.
3Loss of time
If minimally invasive technique with small incisions is used, then recovery time is reduced and scarring is minimized, but bone cuts become unrepeatable and soft tissue damage increases
Solution Approach 1:
The surgical guides serve as intermediaries that bridge the minimally invasive approach with precise bone cutting. These guides are inserted through small incisions but provide stable, repeatable reference frames for all subsequent bone modifications. The guides ensure that even though access is limited, the bone cuts themselves are highly repeatable and accurate.
Solution Approach 2:
The surgical guides and instrumentation pathways are established through small incisions before any bone cutting occurs. This preliminary positioning of guides ensures that all subsequent bone modifications are made with precise, repeatable trajectories. The guides remain in place throughout the procedure, maintaining consistency across all surgical steps despite the minimally invasive approach.
Data Source
AI summary
A minimally invasive method of correcting a bunion includes performing an osteotomy to divide the metatarsal into first and second portions, creating a pocket in the first portion implanting a nail in the pocket, securing a suture to the joint capsule, tensioning the suture to align the great toe with the metatarsal, attaching the suture to the nail, and fastening the nail to the second portion. The nail includes an anchor portion for anchoring in the first portion, a head for attachment to a second portion, a passage for attachment of the suture, a first aperture for a fastener to attach the head with the first portion, and a second aperture for a fastener to attach the head with the second portion.