Acetabular Cup Augment Surface Treatment for Bone Fixation
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Solution Overview
Problem
Current acetabular joint arthroplasty implants often fail to securely attach to the underlying bone and are time-consuming to implant, with existing surface treatments not providing sufficient adherence.
Innovation Solution
The development of enhanced surface treatments and mechanisms for acetabular joint prostheses, including prosthetic acetabular cups and augments with reconfigurable augment-securing mechanisms, such as sliders and guide features, that secure the augment to the cup through frictional engagement and fasteners, allowing for improved bone fixation and streamlined implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing surface treatments are used on acetabular implants, then the implantation process is simpler, but the adherence to bone and adjoining implants is insufficient
Solution Approach 1:
The patent applies porous coating materials to the implant surface that allow bone ingrowth while maintaining structural integrity. The porous structure provides mechanical interlocking with the bone, significantly improving adherence without requiring complex manufacturing processes beyond standard coating techniques.
Solution Approach 2:
The patent uses composite surface treatments combining multiple materials with complementary properties. The composite structure provides both strong bone adherence and compatibility with adjoining implants, resolving the contradiction between reliability and ease of manufacture by integrating multiple functions into a single surface layer.
2Reliability
If existing acetabular joint arthroplasty implants are used, then the design is simpler, but the attachment to underlying bone is insufficient
Solution Approach 1:
The patent divides the implant into distinct functional zones with different surface characteristics. The segmentation allows specific regions to optimize for bone attachment while other regions maintain simplicity for ease of implantation, resolving the contradiction between attachment reliability and device complexity.
Solution Approach 2:
The patent applies different surface treatments and structural features to specific locations on the implant. Local quality enhancements at the bone-contact interface provide superior attachment, while other portions of the implant maintain simpler designs, balancing reliability and complexity.
3Reliability
If existing implantation methods are used, then the procedure is faster, but the attachment to bone is insufficient
Solution Approach 1:
The patent incorporates pre-formed porous coatings and surface treatments on the implant before surgery. This preliminary preparation eliminates the need for time-consuming intraoperative surface modifications, allowing fast implantation while ensuring reliable bone attachment through the pre-engineered surface structure.
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
These solutions provide enhanced bone fixation and faster implantation by ensuring secure attachment of the acetabular joint prosthesis to the pelvis, allowing for better wear characteristics and quicker procedure completion.
Implementation Method 1
a slider on the other of the cup bone-facing surface and the augment cup-facing surface that engages the guide feature. The augment-securing mechanism can be reconfigurable between an unlocked configuration, in which the slider is slidable along the guide feature; and a locked configuration in which the slider and the guide feature are frictionally engaged such that the slider is fixed in place relative to the guide feature
Data Source
AI summary
Medical implant surface treatments and methods are described. Such a surface treatment may provide an uneven texture that is configured to interlock with adjoining bone and/or an uneven texture on another implant, such as an augment for an acetabular cup for revision hip surgery. At least one of the uneven texture of the cup bone-facing surface and the uneven texture of the augment cup-facing surface may include a web of rods. The rods may be configured to interlock with each other when the two implants are urged together.