Adaptive Hinged Articulating Spacer System for Personalized Revision Knee Arthroplasty

Publication ID: 24-11857424_0005_PTD
Published: October 28, 2025
Category:Future Evolutions & Paradigm Shifts

Legal Citation

pr1or.art Inc., “Adaptive Hinged Articulating Spacer System for Personalized Revision Knee Arthroplasty,” Published Technical Disclosure No. 24-11857424_0005_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857424_0005_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,424.

Summary of the Inventive Concept

A next-generation hinged articulating spacer system for revision knee arthroplasty that utilizes advanced technologies such as smart hinge pins, sensor arrays, machine learning algorithms, and 3D-printed biocompatible materials to provide personalized and optimized treatment for patients.

Background and Problem Solved

The original hinged articulating spacer system for revision knee arthroplasty has limitations in terms of its fixed hinge stiffness, lack of real-time adjustment, and limited customization options. The new inventive concept addresses these limitations by introducing adaptive and personalized features that enable more effective and efficient treatment.

Detailed Description of the Inventive Concept

The adaptive hinged articulating spacer system consists of a femur rod and a tibia rod hingedly coupled via a smart hinge pin that adjusts its stiffness in real-time based on the patient's movement patterns. The system further includes a sensor array embedded in the spacer system to track the patient's movement patterns and a wireless communication module to transmit the data to a remote server for analysis and adjustment of the hinge stiffness. Additionally, the femur rod and tibia rod are designed to be 3D-printed using biocompatible materials, and the hinge pin is replaced by a flexible, elastic joint that allows for more natural movement. The system also features a modular design that allows for easy replacement of individual components and a personalized digital twin of the patient's knee joint that simulates the movement patterns and optimizes the spacer system's performance.

Novelty and Inventive Step

The new inventive concept introduces a paradigm shift in revision knee arthroplasty by incorporating advanced technologies such as smart hinge pins, sensor arrays, machine learning algorithms, and 3D-printed biocompatible materials. The adaptive and personalized features of the system provide a significant improvement over the original patent, making it more effective, efficient, and patient-centric.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include the use of different types of sensors, machine learning algorithms, or materials for the spacer system. Additionally, the system could be modified to accommodate different types of knee joints or patient populations. Other variations could include the integration of additional features such as real-time feedback to the patient or remote monitoring capabilities.

Potential Commercial Applications and Market

The adaptive hinged articulating spacer system has significant commercial potential in the orthopedic industry, particularly in the revision knee arthroplasty market. The system's personalized and optimized features could appeal to patients seeking more effective and efficient treatment options. The market for this technology could include hospitals, clinics, and orthopedic device manufacturers.

CPC Classifications

SectionClassGroup
A A61 A61F2/3845
A A61 A61F2/30724
A A61 A61F2/389
A A61 A61F2/3859
A A61 A61F2002/305
A A61 A61F2002/30677
A A61 A61F2310/00011

Field of Art

Orthopedic medical devices, specifically knee arthroplasty revision systems, requiring advanced knowledge of biomechanical engineering, medical device design, materials science, and surgical intervention techniques

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer or orthopedic medical device designer with expertise in prosthetic joint design, biomaterials, sensor integration, and advanced manufacturing techniques such as 3D printing

Obviousness Rationale

A PHOSITA would recognize that integrating smart sensor technologies, machine learning algorithms, and advanced manufacturing techniques into existing knee arthroplasty spacer systems represents a predictable evolution of medical device design. The fundamental structural elements of the hinged articulating spacer remain consistent, with technological enhancements providing incremental improvements in patient-specific treatment and device performance monitoring. These variations represent logical extensions of existing medical device design principles applied to orthopedic prosthetic systems.

Obvious Combinations & Variations

Source Patent Element
Hinged rod system with femur and tibia rods connected via a hinge pin
PTD Variation
Smart hinge pin with real-time stiffness adjustment based on patient movement patterns
Obviousness Reasoning
Adaptive material technologies and sensor integration are well-known in medical device design, making dynamic stiffness adjustment a predictable enhancement for improved patient outcomes
Source Patent Element
Basic articulating spacer system for knee revision
PTD Variation
3D-printed biocompatible materials with embedded sensor arrays
Obviousness Reasoning
Advanced manufacturing and sensor integration represent standard design optimization strategies in medical device development, with predictable benefits in customization and performance tracking
Source Patent Element
Fixed mechanical connection between femur and tibia rods
PTD Variation
Flexible elastic joint replacing rigid hinge pin to allow more natural movement
Obviousness Reasoning
Biomimetic design approaches are common in orthopedic device development, with material science providing multiple strategies for creating more physiologically responsive prosthetic interfaces
Source Patent Element
Static spacer system design
PTD Variation
Modular design with personalized digital twin for movement pattern simulation
Obviousness Reasoning
Digital modeling and modular design are established techniques in medical device engineering, representing a logical progression in patient-specific treatment optimization
Source Patent Element
Mechanical articulating spacer system
PTD Variation
Machine learning algorithm for dynamic hinge stiffness adjustment
Obviousness Reasoning
Adaptive control systems and machine learning are increasingly standard in medical device design, providing predictable methods for performance optimization
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857424 and the disclosed technological variations, a person of ordinary skill in the art would find the proposed adaptive hinged articulating spacer system obvious and anticipated, with the PTD demonstrating that the claimed innovations represent straightforward technological extensions employing known techniques in medical device design and biomechanical engineering.

Original Patent Information

Patent NumberUS 11,857,424
TitleHinged articulating spacer system for revision knee arthroplasty