Modular Cement Spacer Mold for Custom Orthopedic Implants
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Solution Overview
Problem
Current methods for two-stage re-implantation in orthopedic surgery are inefficient, requiring extensive surgical time, multiple procedures, and re-sterilization steps, which prolong patient recovery and increase costs, while lacking customization for individual patient needs.
Innovation Solution
A modular articulating two-stage cement hip spacer mold system comprising interchangeable head and stem component molds with surface area increasing features, made from biocompatible materials like silicone, allowing for customizable temporary implants with enhanced antibiotic delivery and reinforced connectors for strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional two-stage re-implantation methods are used, then infection treatment can be achieved, but surgical time and patient recovery time are prolonged
Solution Approach 1:
The patent combines the head component mold and stem component mold into a single integrated mold assembly that can be filled and implanted as one unit. This merging of previously separate components and procedures into a single surgical step directly reduces surgical time while maintaining the two-stage treatment protocol for infection management.
Solution Approach 2:
The mold system is prepared in advance with pre-attached head and stem component molds that are ready for immediate filling and implantation. The modular design allows these components to be pre-assembled and sterilized before surgery, eliminating intraoperative assembly steps and reducing overall surgical time.
2Reliability
If traditional joint prosthesis replacement is performed, then joint function can be restored, but multiple surgical procedures are required
Solution Approach 1:
The patent merges the head component and stem component into a single mold assembly that is filled and implanted in one surgical procedure. This combination eliminates the need for separate surgical steps to implant each component individually, thereby improving surgical procedure efficiency while achieving the same joint function restoration outcome.
Solution Approach 2:
The mold system is designed to serve multiple functions: it acts as both the forming tool for the cement implant and the delivery mechanism for the antibiotic-loaded cement. This multi-functionality reduces the number of separate procedures needed, as the same system accomplishes both implant formation and antibiotic delivery in a single surgical event.
3Reliability
If standard implant procedures are used, then joint replacement can be performed, but customization for individual patient needs is limited
Solution Approach 1:
The patent divides the implant system into separate modular components: a head component mold, a stem component mold, and connecting elements. This segmentation allows each component to be independently selected and configured to match specific patient anatomical requirements, enabling customization of head size, stem size, and connector type while maintaining overall system integrity.
Solution Approach 2:
The mold system incorporates dynamic adjustability through interchangeable components and adjustable connectors. The head and stem components can be selected in various sizes and configurations, and the connecting elements can be adjusted to accommodate different patient anatomies, providing the versatility needed for customized implantation while maintaining reliable joint replacement outcomes.
Data Source
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AI summary
The present teachings provide a modular articulating cement spacer mold for forming a temporary implant. The modular spacer mold includes a head component mold (12), defining a first opening, a head connector (14), positioned within the first opening of the head component mold, a stem component mold (16), defining a second opening, and a stem connector (18), to fit within the second opening of the stem component mold to mateably engage the head connector. Related kits and methods of forming a temporary implant are provided.