Artificial Intelligence-Assisted Knee Arthroplasty System for Enhanced Kinematic Alignment

Publication ID: 24-11857202_0010_PTD
Published: November 07, 2025
Category:Future Evolutions & Paradigm Shifts

Legal Citation

pr1or.art Inc., “Artificial Intelligence-Assisted Knee Arthroplasty System for Enhanced Kinematic Alignment,” Published Technical Disclosure No. 24-11857202_0010_PTD, Published November 07, 2025, available at https://archive.pr1or.art/24-11857202_0010_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. 11,857,202.

Summary of the Inventive Concept

A next-generation knee arthroplasty system that leverages artificial intelligence, machine learning, and advanced instrumentation to achieve optimal kinematic alignment and improved patient outcomes.

Background and Problem Solved

The original patent, 'Knee resection and gap balancing instruments and techniques for kinematic alignment,' provides a foundation for total knee arthroplasties with kinematic alignment. However, it relies on manual adjustments and lacks real-time optimization. The new inventive concept addresses these limitations by integrating AI-assisted gap balancing, machine learning-based resection plane prediction, and advanced instrumentation to ensure precise and efficient surgical procedures.

Detailed Description of the Inventive Concept

The new system comprises a tibial positioner device with AI-assisted gap balancing, which automatically adjusts the proximal tibial resection plane based on patient-specific anatomical data. The system also utilizes a machine learning algorithm to predict optimal femoral and tibial resection planes based on pre-operative imaging data and adjusts the resection planes in real-time during the surgical procedure. Additionally, the system features modular, interchangeable instrument modules with unique identifiers, tracked by a central computer system to ensure accurate and efficient surgical planning and execution. A virtual reality-based planning system allows surgeons to practice and refine their surgical technique, while a robotic arm with haptic feedback optimizes the surgical procedure and minimizes human error.

Novelty and Inventive Step

The new claims introduce AI-assisted gap balancing, machine learning-based resection plane prediction, and advanced instrumentation, which are not present in the original patent. These innovations provide a significant improvement in kinematic alignment and patient outcomes, making the new inventive concept novel and non-obvious.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include using different AI algorithms, integrating additional sensors or imaging modalities, or developing customized instrument modules for specific surgical procedures. Variations could also involve adapting the system for other orthopedic procedures or developing a cloud-based platform for data sharing and collaboration among surgeons.

Potential Commercial Applications and Market

The artificial intelligence-assisted knee arthroplasty system has significant commercial potential in the orthopedic industry, particularly in the growing market for robotic-assisted and computer-navigated surgical systems. The system's ability to improve patient outcomes, reduce surgical time, and enhance surgeon confidence could lead to widespread adoption in hospitals and surgical centers.

CPC Classifications

SectionClassGroup
A A61 A61B17/155
A A61 A61B17/157
A A61 A61B17/1675
A A61 A61B17/1764
A A61 A61B17/90
A A61 A61B2017/564
A A61 A61B2090/061

Field of Art

Orthopedic surgical instrumentation and techniques, specifically total knee arthroplasty systems with a focus on precision alignment and surgical planning technologies

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer or orthopedic surgical instrument designer with advanced degrees in biomedical engineering, expertise in surgical instrumentation design, knowledge of medical imaging technologies, and familiarity with computer-assisted surgical planning systems

Obviousness Rationale

A PHOSITA would recognize that integrating artificial intelligence and machine learning into existing knee arthroplasty positioning systems represents a predictable technological evolution. The source patent's foundational work on precise knee alignment naturally suggests opportunities for computational enhancement and real-time surgical guidance. The proposed variations leverage known computational techniques to improve upon existing mechanical alignment strategies, representing an incremental yet logical technological progression.

Obvious Combinations & Variations

Source Patent Element
Tibial and femoral coupling blocks with precise positioning pins
PTD Variation
AI-assisted gap balancing system that automatically adjusts resection planes
Obviousness Reasoning
A PHOSITA would recognize that computational optimization of existing mechanical alignment techniques represents a predictable application of known machine learning techniques to improve surgical precision
Source Patent Element
Mechanical positioning system for knee arthroplasty
PTD Variation
Virtual reality surgical planning and simulation environment
Obviousness Reasoning
Integrating pre-operative planning technologies is a known technique for improving surgical outcomes, representing an obvious extension of existing positioning methodologies
Source Patent Element
Precise surgical instrumentation with coupling mechanisms
PTD Variation
Modular instrument system with unique digital identifiers and centralized tracking
Obviousness Reasoning
Digitally tracking and managing surgical instruments is a predictable technological progression for improving surgical workflow and instrument management
Source Patent Element
Mechanical alignment techniques for knee resection
PTD Variation
Machine learning algorithm predicting optimal resection planes from pre-operative imaging
Obviousness Reasoning
Applying computational analysis to surgical planning represents a straightforward technological improvement using known machine learning techniques
Source Patent Element
Mechanical positioning system for surgical instruments
PTD Variation
Robotic surgical arm with haptic feedback and real-time imaging integration
Obviousness Reasoning
Enhancing mechanical positioning systems with robotic technologies is a predictable evolution in surgical instrumentation design
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857202 and the technological context of orthopedic surgical instrumentation, the variations disclosed herein would have been obvious to a Person Having Ordinary Skill In The Art at the time of invention. The proposed AI-assisted, computationally enhanced knee arthroplasty system represents a predictable application of known machine learning and surgical planning technologies to existing mechanical alignment methodologies, thereby rendering potential claims in this domain obvious and unpatentable.

Original Patent Information

Patent NumberUS 11,857,202
TitleKnee resection and gap balancing instruments and techniques for kinematic alignment
Assignee(s)Zimmer, Inc.