Orthopedic Implant Kit With Multi-Use Screw and Rod Instruments

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Solution Overview

Problem

Existing orthopedic implant systems require multiple dedicated instruments for each step of implantation, leading to increased complexity and handling difficulties.

Innovation Solution

An orthopedic implant kit featuring a lockable poly-axial screw with a separable head and threaded portion, a screw extender with expandable half-tubes, and a multi-use instrument with torque limiting mechanism, allowing for mono-axial or poly-axial operation and simplifying the handling of orthopedic implants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple dedicated instruments are used for each step of implantation, then the precision and reliability of each step is improved, but the device complexity and handling difficulty increase

Engineering Contradiction:

Improveimplantation precisionVSAvoidnumber of instruments

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a multi-functional instrument that can perform multiple operations including rod reduction, set screw fixation, and screw release through different attachments. The main instrument body accepts various specialized attachments that enable it to replace multiple dedicated instruments, thereby reducing overall device complexity while maintaining the reliability needed for each specific function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs a nested structure where specialized attachments are stored within or on the main instrument body. The attachments can be attached or detached as needed, allowing the system to maintain a compact form factor while providing access to multiple specialized functions, thus reducing the number of separate instruments required

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If multiple dedicated instruments are used for each step of implantation, then the reliability of each step is improved, but the ease of operation deteriorates

Engineering Contradiction:

Improveimplantation precisionVSAvoidhandling ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

By creating a single main instrument body that can perform multiple functions through attachments, the patent reduces the number of instrument transitions required during surgery. The surgeon handles one main instrument throughout the procedure, attaching different specialized components as needed, which improves ease of operation while maintaining the precision of each specific function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the functions of multiple dedicated instruments into a single multi-functional instrument system. By combining the common operational elements into one instrument body and providing specialized attachments for specific functions, the system improves handling ease by reducing the number of separate tools the surgeon must manage

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If a single multi-use instrument is used for multiple functions, then the device complexity and ease of operation are improved, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvenumber of instrumentsVSAvoidattachment interface precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent divides the instrument system into a main instrument body and separate specialized attachments. This segmentation allows each component to be manufactured and tested independently with standardized interfaces, reducing the overall manufacturing precision requirements compared to creating a single complex multi-functional instrument. The modular design enables precision to be achieved at the interface level rather than requiring the entire instrument to be perfectly precise

Inventive Principle:

Principle #1Segmentation

4Ease of operation

If a single multi-use instrument is used for multiple functions, then the ease of operation is improved, but the reliability of each specific function may deteriorate

Engineering Contradiction:

Improvehandling easeVSAvoidfunction-specific precision

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent achieves universality through a main instrument body that works with specialized attachments for each specific function. Each attachment is designed to provide the precise function-specific capabilities needed for rod reduction, set screw fixation, and screw release, while the common instrument body provides consistent handling. This approach maintains reliability for each function while improving ease of operation by using a single instrument platform

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250345101A1Orthopedic Implant Kit

Publication Date: 2025.11.13 NEO MEDICAL

AI summary

An orthopedic implant kit comprising a lockable poly-axial screw, a tissue dilatation sleeve, a screw driver, a screw extender, a rod, rod-reduction device, a set screw driver, a torque limiting device and a screw releasing device.