Bone Deformity Correction Device for Single-Handed Lapidus Fusion

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Solution Overview

Problem

Lapidus fusion procedures are challenging due to the need for multiple devices, requiring surgeons to use both hands and assistants, and face complications from multiple fixation plates with 90-degree angled screws, limited space for bone purchase, and increased soft tissue irritation.

Innovation Solution

A bone deformity correction device with an elongate body, adjustable manipulation arm, and cutting guide, allowing single-handed operation and improved fixation using a single fixation plate with a biplanar design to minimize interference and irritation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If multiple fixation plates are used to strengthen bone fixation, then fixation strength is improved, but device complexity and surgical difficulty increase

Engineering Contradiction:

Improvefixation strengthVSAvoiddevice complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent combines multiple fixation functions into a single fixation plate with multiple holes positioned to provide both transverse and longitudinal fixation. This eliminates the need for separate fixation plates while maintaining comprehensive bone stabilization, directly resolving the contradiction between fixation strength and device complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single fixation plate is designed with universal functionality to perform multiple fixation tasks simultaneously - it provides both transverse and longitudinal bone fixation, as well as allowing for adjustable screw placement. This multi-functional design replaces what would traditionally require multiple specialized fixation devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple fixation plates with 90-degree angled screws are used, then fixation reliability is improved, but soft tissue irritation and surgical time increase

Engineering Contradiction:

Improvefixation reliabilityVSAvoidsoft tissue irritation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts and eliminates the harmful element of multiple overlapping fixation plates that cause soft tissue irritation. By using a single plate design, the patent removes the redundant hardware that would otherwise be embedded in soft tissues, reducing irritation while maintaining fixation reliability through optimized hole placement

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The fixation plate is pre-designed with holes positioned at optimal angles and locations to provide reliable fixation from the outset. This preliminary configuration eliminates the need for sequential placement of multiple plates with 90-degree angled screws, reducing both surgical time and soft tissue exposure to multiple foreign bodies

Inventive Principle:

Principle #10Preliminary action

3Manufacturing precision

If multiple devices are used for bone alignment and fixation, then positioning precision is improved, but ease of operation deteriorates

Engineering Contradiction:

Improvepositioning precisionVSAvoidease of operation

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The patent merges alignment and fixation functions into a single integrated device. The positioning tool and fixation plate work as a unified system where the same device that provides precise positioning also performs the fixation, eliminating the need for surgeons to switch between multiple devices and maintain positioning with both hands

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixation plate is designed to be self-positioning and self-fixating. The multiple holes in the plate allow it to automatically align with bone structures and provide stable fixation without requiring complex manual positioning or assistance from additional devices, making the procedure easier to perform while maintaining precision

Inventive Principle:

Principle #25Self-service

4Strength

If two separate fixation plates are attached, then fixation strength is improved, but surgical time and operational complexity increase

Engineering Contradiction:

Improvefixation strengthVSAvoidsurgical time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The patent merges the function of two separate fixation plates into a single integrated plate with multiple fixation holes. This consolidation reduces the number of surgical steps from attaching two separate plates to attaching one plate, significantly reducing surgical time while maintaining equivalent or superior fixation strength through optimized hole configuration

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixation plate is pre-configured with multiple holes positioned to provide comprehensive fixation in a single device. This preliminary design eliminates the need for sequential attachment of multiple plates, allowing the surgeon to achieve the same fixation strength in a single operational step rather than multiple steps

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12446895B2Bone deformity treatment system, device, and related methods

Publication Date: 2025.10.21 TRILLIANT SURGICAL LLC

AI summary

Bone deformity correction devices and methods of using such devices to correct bone deformities. The device can include an elongate body, an adjustable manipulation arm movably coupled to the elongate body, wherein the adjustable manipulation arm is configured to move axially and laterally, and a cutting guide removably attachable to the device elongate body.