Expandable Osseous Anchor With Cortical Stabilization

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Solution Overview

Problem

Existing osseous anchoring implants face issues with stability and ease of implantation, often causing damage to bone tissue and risking displacement during impacts, with current solutions like EP2603163 B1 offering limited immobilization.

Innovation Solution

An osseous anchoring implant with a expandable sleeve and screw design, featuring complementary threading and a reversed pitch, allowing for stable expansion and anchoring through a frustoconical shape, enhancing primary stability and minimizing bone damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If current osseous anchoring implant devices are used, then the implant can be introduced into osseous tissue, but it generates more cracks or damage than required in the osseous tissue

Engineering Contradiction:

Improveease of implantationVSAvoidbone tissue damage

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The implant is divided into two functional parts: a gripping part for initial anchoring and an expansion part for stabilization. This segmentation allows the implant to be introduced with minimal damage while achieving stable fixation through subsequent expansion within the prepared housing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gripping part is designed to be introduced first into the osseous tissue to create a stable housing. This preliminary action prepares the bone structure to receive the expansion part without causing additional damage during the implantation process.

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If current osseous anchoring implant devices are used, then the implant can be introduced into osseous tissue, but the fixation in the osseous implant is not reliable and extremely stable

Engineering Contradiction:

Improveease of implantationVSAvoidfixation stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The implant transitions from a static introduction phase to a dynamic expansion phase. The expansion part is designed to move relative to the gripping part, enabling the implant to adapt and stabilize within the osseous tissue, thereby achieving reliable and extremely stable fixation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The expansion mechanism changes the physical parameters of the implant by increasing its volume and surface area within the bone housing. This parameter change enhances the mechanical interlocking and friction, resulting in extremely stable fixation.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the implant design from EP2603163 B1 is used, then the implant can be immobilized in rotation and translation, but it presents the risk of moving during impact

Engineering Contradiction:

ImproveimmobilizationVSAvoidimpact resistance

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The implant combines two functional components with complementary properties: a gripping part for initial anchoring and an expansion part for impact resistance. This composite structure provides both immobilization and strength against impact forces through the synergistic interaction of its parts.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The expansion part features a frustoconical shape that provides geometric interlocking with the bone housing. This curved geometry distributes impact forces evenly across the bone-implant interface, preventing movement during impact while maintaining immobilization.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Manufacturing precision

If implantation is difficult to perform, then positioning accuracy may be compromised, but ease of operation is reduced

Engineering Contradiction:

Improvepositioning accuracyVSAvoidease of implantation

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The segmented design with a gripping part and expansion part allows for simplified implantation procedures. The gripping part can be easily introduced and positioned, while the expansion part is activated subsequently, ensuring positioning accuracy without complicating the overall operation.

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The implant provides stable and secure anchoring in bone tissue, ensuring easy implantation and resistance to displacement, reducing the need for bone filling materials and enhancing osteointegration.

Implementation Method 1

generating the expansion of said expandable sleeve by deformation

Methodology Applied

Scientific EffectDeformation: Deformation

Data Source

PatentUS12558135B2Osseous anchoring implant with cortical stabilization

Publication Date: 2026.02.24 LOCK IN SA

AI summary

An osseous anchoring implant with cortical stabilization, including an expandable sleeve having a first threading inside and a second threading outside, a screw having an external profile complementary to the internal profile of said expandable sleeve and an external threading with a reverse screw pitch of the second threading. The implant switching from a folded rest position to a deployed position by the actuation of said reversed threadings, causing the penetration of the screw into the expandable sleeve and generating the radial expansion of said expandable sleeve by deformation on a distal portion. In the deployed position, the expandable sleeve has a frustoconical shape. The proximal portion of the screw includes an outer osseous anchoring threading and a frustoconical portion whose flaring is reversed relative to that of the expandable sleeve in the deployed position.