Acetabular Cup Assembly with Adjustable Press-Fit and Osteointegration
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Solution Overview
Problem
Existing acetabular cups for hip prostheses lack versatility and are difficult to adjust to the shape of the acetabular seat, requiring multiple types and complicating the fixation process, making it inefficient and unsafe during surgery.
Innovation Solution
The acetabular cup assembly includes a press-fit coupled acetabular cup with a growth support and fixing plate, allowing for adjustable positioning and secure fixation using screws, enabling omnidirectional spherical joint formation without an intermediate insert, and featuring a trabecular structure for osteointegration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of acetabular cups are provided to accommodate different acetabular seat configurations, then adaptability is improved, but device complexity and surgical procedure complexity increase
Solution Approach 1:
The acetabular cup is designed with a universal adaptation mechanism featuring a press-fit coupling system with a coupling surface that can be adjusted to match different acetabular seat configurations. The cup includes adjustment mechanisms allowing modification of its position and orientation within the acetabular seat, enabling a single cup design to serve multiple anatomical variations without requiring multiple specialized cup types.
2Adaptability or versatility
If multiple types of acetabular cups are provided for different configurations, then adaptability is improved, but ease of operation during surgery deteriorates
Solution Approach 1:
The acetabular cup incorporates dynamic adjustment capabilities allowing the surgeon to modify the cup's position, orientation, and configuration in real-time during the surgical procedure. The press-fit coupling system includes movable elements and adjustment mechanisms that enable flexible positioning without requiring pre-selection of multiple fixed-type cups, simplifying the surgical decision-making process and操作流程.
3Device complexity
If traditional fixation methods are used for acetabular cups, then simplicity is maintained, but reliability and safety of fixation deteriorate
Solution Approach 1:
The acetabular cup employs a composite fixation system combining press-fit mechanical coupling with osteointegration-capable materials. The cup body is made of biocompatible material with a surface treatment or coating that promotes bone ingrowth and biological fixation. This composite approach integrates mechanical stability from the press-fit interface with long-term biological anchoring, achieving both reliable fixation and material simplicity.
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
This solution provides a versatile, safely and simply fixable acetabular cup assembly that can be adjusted to accommodate various acetabular seat configurations, enhancing surgical efficiency and patient outcomes by ensuring a secure and adaptable fit.
Implementation Method 1
an acetabular cup (1) suitable for being coupled in the seat (80) of the acetabulum (8) of the patient in press-fit coupling mode
Implementation Method 2
screws (4) for fixing the acetabular cup, the growth support (2) and the fixing plate (3) to the acetabular bone
Implementation Method 3
featuring a trabecular structure for osteointegration
Data Source
Figure 1
Figure 2~3
Figure 2A
AI summary
An acetabular cup assembly (100) comprises: an acetabular cup (1) suitable for being fixed in a seat (80) of an acetabulum (8) of the patient and for accommodating a head (5) with a substantially spherical shape fixed to a stem (6) suitable for being disposed in a femur of the patient, a growth support (2) suitable for being fixed to the acetabular cup (1) and to the acetabular seat (80), a fixing plate (3) suitable for being fixed to the acetabulum (8) of the patient in order to hold the acetabular cup (1) and the head (5) of the prosthesis, and screws (4) for fixing the acetabular cup, the growth support (2) and the fixing plate (3) to the acetabular bone.