Self In-Fusing Pedicle Screw With Boring Ring for Bone Integration

Solution Overview

Problem

Conventional pedicle screw systems for spinal fixation often result in prolonged recovery times and increased risk of screw pullout due to inadequate bone integration and stability, particularly in the correction of posterior segmental fusion.

Innovation Solution

An anchoring system comprising a screw assembly with a boring ring and interface elements that promote bleeding and bone graft formation, providing optimal surface area fusion and adjustable coupling for enhanced stability, along with a driver assembly for precise implantation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional pedicle screw systems are used for spinal fixation, then spinal stabilization is achieved, but recovery time is prolonged and screw pullout risk increases due to inadequate bone integration

Engineering Contradiction:

Improvescrew fixation stabilityVSAvoidrecovery time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The boring ring performs preliminary decortication of the bone surface before screw insertion, creating a prepared bed that promotes immediate bone integration and accelerates healing while ensuring stable fixation from the outset

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Bone graft material is introduced as an intermediary substance between the screw interface and bone, facilitating enhanced bone integration and faster fusion while maintaining reliable screw fixation stability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If conventional pedicle screw systems are used, then spinal stabilization is achieved, but screw pullout risk increases due to insufficient bone-screw integration

Engineering Contradiction:

Improvebone-screw integration strengthVSAvoidresistance to screw pullout

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The boring ring performs preliminary decortication of the bone surface before screw insertion, creating a prepared bed that promotes immediate bone integration and accelerates healing while ensuring stable fixation from the outset

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Bone graft material is introduced as an intermediary substance between the screw interface and bone, facilitating enhanced bone integration and faster fusion while maintaining reliable screw fixation stability

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If variable angled coupling caps are used to allow angular adjustment, then adaptability to different spinal configurations is improved, but device complexity increases

Engineering Contradiction:

Improveangular adjustment capabilityVSAvoidcoupling mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The coupling cap incorporates a dynamic polyaxial mechanism that allows angular adjustment during implantation to accommodate varying spinal anatomies, then locks into a stable configuration to maintain structural integrity, balancing adaptability with simplicity

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11446065B2Self in-fusing pedicle screw implant

Publication Date: 2022.09.20 GLOBUS MEDICAL INC

AI summary

An anchoring system implantable in bone. The anchoring system includes a screw having a screw head, a screw shaft, a plurality of interface elements, each adjacent pair of the interface elements has an interface by-pass channel disposed therebetween, a boring ring that includes cutting teeth and a ring by-pass channel, and a coupling assembly that is adjustable with respect to a longitudinal axis of the screw.