Fracture Reduction Assembly for Stable Pin-to-Screw Fixation

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Solution Overview

Problem

Current surgical equipment and techniques for stabilizing bone fractures, particularly at the level of bone epiphyses or joints, lack effective temporary stabilization and often require significant implementation time, leading to potential changes in anatomical reduction during fixation with locking screws.

Innovation Solution

A surgical set comprising osteosynthesis support plates, diaphyseal and epiphyseal fixation devices, aiming guides, and arthroscopy equipment, allowing for precise placement of fixation pins and devices while maintaining temporary stability, using identical maneuvering tools and measuring devices for accurate depth determination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fixation pins are removed to allow placement of locking screws, then the fracture can be fixed with locking screws, but the anatomical reduction may change during pin removal due to lack of stability

Engineering Contradiction:

Improvestability of anatomical reductionVSAvoidplacement of locking screws

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies preliminary action by placing aiming guides on the plate before removing the fixation pins. The aiming guides provide continuous support and guidance for screw placement, preventing loss of anatomical reduction during the transition from pin fixation to screw fixation. This preliminary setup ensures stability is maintained throughout the procedure.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The aiming guides serve as intermediary elements that remain in place during the transition from pin to screw fixation. These guides provide continuous structural support and alignment, acting as a mediator that maintains anatomical reduction while enabling the placement of locking screws. The guides are removed only after screws are properly positioned.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If traditional fixation methods are used, then the procedure can be completed, but significant implementation time is required

Engineering Contradiction:

Improveimplementation timeVSAvoidprecision in fracture reduction

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The aiming guides are pre-positioned on the plate before the fracture reduction procedure begins. This preliminary placement eliminates the need for time-consuming measurements and adjustments during surgery. The guides come pre-configured with precise geometries that ensure accurate screw placement and anatomical reduction, significantly reducing implementation time while maintaining high precision.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the parameter of precision from being achieved through complex intraoperative measurements to being inherent in the pre-manufactured aiming guides. The guides incorporate precise geometric parameters and positioning features that ensure accurate fracture reduction and screw placement without requiring time-consuming measurement procedures during surgery.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If multiple different tools are used for maneuvering fixation devices and aiming guides, then different functions can be performed, but the procedure becomes more complex and time-consuming

Engineering Contradiction:

Improvefunctionality of maneuvering toolsVSAvoidnumber of different tools required

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing the aiming guides with standardized heads that can be maneuvered by the same tool used for fixation devices. This multi-functional approach allows a single tool to perform both aiming guide manipulation and fixation device installation, reducing the number of different tools required while maintaining full functionality throughout the procedure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the maneuvering interfaces of the aiming guides with those of the fixation devices by using identical or compatible head geometries. This combination allows the surgical team to use a single tool for both aiming guide placement and fixation device installation, simplifying the toolset and reducing procedural complexity while maintaining adaptability for different surgical needs.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP4142623B1Surgical assembly designed to reduce a bone fracture

Publication Date: 2026.01.28 NEWCLIP INT

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AI summary

The present invention relates to a surgical assembly for reducing a fracture situated at bone epiphyses or joints comprising: an osteosynthesis support plate (1), a set of diaphyseal fixing members (12), a set of cannulated epiphyseal fixing members (20), a set of fixing pins (40), at least one cannulated sighting guide (30, 30a), a cannulated tool (50) for rotating the fixing members (12, 20) and the sighting guides (30, 30a), also acting as a measuring instrument (for determining the length of at least some of the epiphyseal fixing members (20) to be used), a cannulated drilling device (for drilling holes suitable for positioning at least some of the fixing members (20)) and, preferably, an arthroscopic device designed to allow the practitioner to view some of the operative phases.