Resorbable Flat Structure Implant for Acetabular Defect Reconstruction

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Solution Overview

Problem

The challenge in modern therapeutic surgery is the loss of bone tissue from the acetabulum and femur during revision and replacement operations of total hip endoprostheses, which complicates the restoration of anatomical bone conditions and requires complex surgical procedures, often resulting in inadequate mechanical stability and potential failure of the implanted endoprosthesis.

Innovation Solution

An implant with at least one flat structure made from a material that is partially decomposable or resorbable in vivo, such as collagen or synthetic polymers, is used to treat and reconstruct acetabular defects, reducing bone loss during revisions and promoting bone tissue neogenesis, while maintaining mechanical stability and load-bearing capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If metal revision meshes are used to fill acetabular defects, then mechanical stability is improved, but foreign matter remains in the bone defect causing potential complications

Engineering Contradiction:

Improvemechanical stabilityVSAvoidforeign matter in bone defect

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The patent employs resorbable flat structures that temporarily provide mechanical support during the critical healing period, then gradually decompose and are absorbed by the body. These structures serve their purpose and then disappear, eliminating foreign matter while maintaining mechanical stability when needed.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent utilizes materials with time-dependent mechanical properties that change as they resorb. The flat structures initially provide high mechanical strength to stabilize the defect, then progressively degrade as bone tissue regenerates, transferring load to the new bone and eventually eliminating the foreign material.

Inventive Principle:

Principle #35Parameter changes

2Duration of action of stationary object

If non-resorbable materials are used for acetabular defect filling, then mechanical stability is maintained long-term, but bone tissue neogenesis is impaired

Engineering Contradiction:

Improvelong-term mechanical stabilityVSAvoidbone tissue neogenesis

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The patent uses temporarily active resorbable flat structures that provide mechanical support only during the critical early healing phase. Once bone tissue has regenerated and gained sufficient strength, the flat structures decompose and are absorbed, eliminating foreign matter that would otherwise impede bone growth while having served their mechanical purpose.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The resorbable flat structures automatically transfer their mechanical function to the regenerating bone tissue over time. As the bone heals and strengthens, the flat structures progressively degrade and are absorbed, with the system self-regulating the transition from artificial support to biological support without external intervention.

Inventive Principle:

Principle #25Self-service

3Shape

If complex surgical procedures are performed to restore acetabular bone conditions, then anatomical reconstruction is improved, but surgical complexity and risk increase

Engineering Contradiction:

Improveanatomical reconstructionVSAvoidsurgical procedure complexity

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The patent extracts the most critical function from complex multi-component revision systems and isolates it into simple resorbable flat structures. By focusing on providing only the essential temporary mechanical support and osteoconductive scaffold functions, the invention simplifies the surgical procedure while achieving effective anatomical reconstruction.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs porous resorbable flat structures that serve as osteoconductive scaffolds, allowing bone tissue to grow through and integrate with the implant. This porous architecture provides both mechanical support and biological functionality in a single simple component, reducing surgical complexity while achieving anatomical reconstruction.

Inventive Principle:

Principle #31Porous materials

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 use of decomposable or resorbable materials in the implant significantly reduces bone loss during revisions, allows for biological reconstruction of acetabular defects, and ensures no foreign matter remains after decomposition, enhancing the therapeutic outcome by promoting bone growth and maintaining implant stability.

Implementation Method 1

a material that is at least partially decomposable or resorbable in vivo

Methodology Applied

Scientific EffectBiological degradation: Decomposition (biological)

Data Source

PatentUS11918707B2Implant, preferably for the treatment of an acetabular defect

Publication Date: 2024.03.05 AESCULAP AG

AI summary

An implant, preferably for treating and/or reconstructing, in particular lining and/or sealing and/or relining and/or at least partially filling an acetabular defect, having at least one flat structure which contains a material that is at least partially decomposable or resorbable in vivo. The invention further relates to a surgical kit and the use of an unfinished flat structure for producing an implant.