Enhanced Void Filling Joint Prosthesis System

Publication ID: 24-11857205_0001_PTD

Published: November 07, 2025

Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Void Filling Joint Prosthesis System,” Published Technical Disclosure No. 24-11857205_0001_PTD, Published November 07, 2025, available at https://archive.pr1or.art/24-11857205_0001_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. 11,857,205.

Summary of the Inventive Concept

An advanced void filling joint prosthesis system with improved design features and instrumentation, enhancing the efficiency, safety, and effectiveness of joint replacement surgeries.

Background and Problem Solved

The original void filling joint prosthesis patent has limitations in terms of adaptability, fixation, and monitoring. The new inventive concept addresses these limitations by introducing adjustable apertures, self-locking screw mechanisms, porous coatings, advanced surgical instruments, and built-in sensors for real-time performance monitoring.

Detailed Description of the Inventive Concept

The enhanced void filling joint prosthesis system comprises a central body with an adjustable aperture, allowing for accommodation of varying IM stem diameters via a threaded mechanism. The prosthesis is secured using a self-locking screw mechanism integrated into the prosthesis, ensuring reliable fixation. The surface of the prosthesis features a porous coating, promoting bone ingrowth and enhancing fixation. A comprehensive surgical instrument set includes a reamer, impactor, and guide wire, facilitating efficient and accurate implantation. Additionally, the prosthesis incorporates a built-in sensor, providing real-time data on prosthesis alignment, stability, and bone growth.

Novelty and Inventive Step

The new claims introduce novel features that distinguish the enhanced void filling joint prosthesis system from the original patent. The adjustable aperture, self-locking screw mechanism, porous coating, advanced surgical instruments, and built-in sensor for real-time performance monitoring collectively represent a significant inventive step forward.

Alternative Embodiments and Variations

Alternative embodiments may include varying the design of the adjustable aperture, utilizing different types of porous coatings, or integrating additional sensors for monitoring other parameters. Variations may also involve adapting the surgical instrument set for use with different types of joints or prosthetic components.

Potential Commercial Applications and Market

The enhanced void filling joint prosthesis system has significant commercial potential in the orthopedic industry, particularly in the areas of joint replacement and reconstruction. The system's improved design features and instrumentation are likely to appeal to surgeons and healthcare providers seeking more efficient, safe, and effective solutions for their patients.

CPC Classifications

Section	Class	Group
A	A61	A61B17/1675
A	A61	A61B17/164
A	A61	A61B17/17
A	A61	A61B17/1764
A	A61	A61F2/30724
A	A61	A61F2/30734
A	A61	A61F2/30767
A	A61	A61F2/38
A	A61	A61F2/3859
A	A61	A61F2/461
A	A61	A61B2090/036
A	A61	A61B2090/062
A	A61	A61F2002/3021
A	A61	A61F2002/3069
A	A61	A61F2002/3093
A	A61	A61F2002/30332
A	A61	A61F2002/30736

Section 103 Obviousness Analysis (PHOSITA)

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Field of Art

Orthopedic surgical techniques and prosthetic joint replacement, specifically focusing on void filling and bone reconstruction procedures for femoral and other joint replacements

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer or orthopedic surgical device designer with advanced degree, expertise in medical device design, biomaterials, surgical instrumentation, and knowledge of current joint replacement technologies

Obviousness Rationale

A PHOSITA would recognize that the PTD's variations represent incremental improvements using known techniques in orthopedic prosthetic design. The disclosed features such as adjustable aperture, self-locking mechanisms, and integrated sensors are logical extensions of existing joint replacement technologies that solve predictable technical challenges in prosthetic implantation and monitoring.

Obvious Combinations & Variations

Source Patent Element

Method of inserting void filling prosthesis into bone void

PTD Variation

Adding adjustable aperture with threaded mechanism to accommodate varying IM stem diameters

Obviousness Reasoning

Dimensional adaptability is a standard design optimization technique, and a PHOSITA would find it obvious to create adjustable prosthesis features to enhance surgical flexibility and compatibility

Source Patent Element

Press-fit fixation technique for prosthesis insertion

PTD Variation

Incorporating self-locking screw mechanism integrated into prosthesis

Obviousness Reasoning

Mechanical fixation enhancements are predictable design iterations that a skilled practitioner would develop to improve prosthesis stability and reduce surgical complications

Source Patent Element

Basic void filling prosthesis design

PTD Variation

Adding porous coating to promote bone ingrowth and enhance fixation

Obviousness Reasoning

Surface modification techniques for improved osseointegration are well-known in orthopedic implant design, representing a standard approach to enhancing prosthetic performance

Source Patent Element

Surgical method for femoral prosthesis replacement

PTD Variation

Developing comprehensive surgical instrument set with reamer, impactor, and guide wire

Obviousness Reasoning

Specialized surgical instrumentation is a routine design consideration for improving procedural precision and ease of implementation

Source Patent Element

Basic prosthesis implantation procedure

PTD Variation

Integrating built-in sensor for real-time performance monitoring

Obviousness Reasoning

Sensor integration represents a predictable technological advancement in medical device design, enabling enhanced post-surgical tracking and diagnostic capabilities

35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857205 and the technical variations disclosed herein, a person having ordinary skill in the art would find the claimed innovations obvious and lacking inventive step. The incremental improvements in prosthesis design, fixation mechanisms, and integrated monitoring technologies represent predictable extensions of existing orthopedic surgical techniques, thereby rendering potential patent claims obvious under 35 U.S.C. Section 103.

Original Patent Information

Patent Number	US 11,857,205
Title	Void filling joint prosthesis and associated instruments
Assignee(s)	Howmedica Osteonics Corp.