Tailor-Made Implant Modeling for Bone-Preserving Anchoring

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Solution Overview

Problem

Current joint implant technologies require significant bone resection and drilling, leading to unsatisfactory support and anchoring, lack of customization to individual anatomical structures, and insufficient choice in joint freedom, resulting in complications like tibial dislocation and loss of mobility.

Innovation Solution

A method for manufacturing custom-made implants by superimposing a 3D representation of a standard implant on a 3D representation of the injured bone, modifying dimensions and shape to match the bone's morphology and pathology, ensuring the anchoring surface conforms to the bone's structure and functional surfaces are preserved or restored.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If standard implants are used with significant bone resection and drilling for anchoring, then anchoring strength is improved, but bone damage and loss of mechanical resistance occur

Engineering Contradiction:

Improveanchoring strengthVSAvoidbone damage

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The implant surface is pre-modified with micro-protrusions and micro-depressions before implantation to create immediate mechanical interlocking with the bone surface, eliminating the need for post-implantation drilling and providing immediate anchoring strength without additional bone damage

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The implant surface features localized micro-protrusions and micro-depressions at specific anchoring zones rather than uniform modification across the entire surface, concentrating anchoring strength where needed while preserving bone integrity in other areas

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If flat resection surfaces are created for implant placement, then implant placement is simplified, but support and anchoring become insufficient

Engineering Contradiction:

Improveimplant placement simplicityVSAvoidsupport and anchoring

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The implant surface incorporates curved micro-protrusions and micro-depressions instead of flat surfaces, creating conformal contact with the curved bone anatomy that enhances support and anchoring while maintaining ease of placement through the standardized implant design

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Ease of manufacture

If standard implants with standardized shapes are used, then manufacturing is simplified, but adaptation to individual anatomy is insufficient

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidanatomical adaptation

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The implant features standardized overall geometry for easy manufacturing, but incorporates localized variable features such as micro-protrusions and micro-depressions with varying dimensions and distributions that can be customized to match individual patient anatomy and pathology

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Patient-specific anatomical data is collected and used to pre-customize the implant surface features before manufacturing, allowing standardized production processes to create customized implants that fit individual anatomy without requiring complex post-manufacturing adjustments

Inventive Principle:

Principle #10Preliminary action

4Strength

If significant bone resection is performed for implant placement, then implant anchoring is improved, but joint mobility and natural anatomy are lost

Engineering Contradiction:

Improveimplant anchoringVSAvoidjoint mobility

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The implant surface is pre-modified with micro-protrusions and micro-depressions that create immediate mechanical interlocking with minimal bone resection, providing sufficient anchoring strength while preserving joint mobility and natural anatomy by eliminating the need for extensive bone removal

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The implant design changes the anchoring mechanism from macro-scale bone resection to micro-scale surface features, maintaining anchoring strength through increased surface area contact and mechanical interlocking at the micro-level while preserving overall bone structure and joint function

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3720391B1Method for producing a tailor-made implant

Publication Date: 2025.10.08 3D MEDICAL

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AI summary

The present invention relates to a method for producing a tailor-made implant intended to be implanted at an implantation site of a damaged bone part, the method comprising a step in which a 3D representation of a standard implant is superposed on a 3D representation of a damaged bone part by positioning said standard implant on an implantation site of the damaged bone part, in order, if necessary, to modify the dimensions and/or to adjust the shape of said standard implant, and also, if necessary, to modify the outer surface of said standard implant, which may be either the impression or substantially the impression of the outer surface of said bone part in the state prior to superpositioning of said implant, when the geometry of the damaged bone part is intended to be retained, or a functional outer surface, when said tailor-made implant is intended to be used at the interface of two bone parts cooperating with each other.