The Dual Mobility Total Hip Cup is a component of the Acetabular System designed for use within Total Hip Arthroplasty (THA) systems based on the Dual Mobility Articulation concept.
In general, the Dual Mobility concept provides two levels of articulation within the Acetabular Construct. The first occurs between the Femoral Head and a compatible Mobile Bearing Component, while the second occurs between the external surface of the mobile bearing and the internal surface of the Acetabular Cup, according to the design and compatible components of the surgical system.
The product is available in a graduated range of Cup Sizes from 42 mm to 58 mm, with consistent 2 mm increments, providing a total of 9 Product Configurations. All sizes listed in the product table are associated with a 28 mm Configuration, and each size has an individual AMS Product Code.
This graduated size range allows the surgeon to select the appropriate Acetabular Cup Dimension according to Acetabular Anatomy, Bone Stock, Preoperative Templating, Intraoperative Sizing, and the requirements of Hip Reconstruction.
The Dual Mobility Cup functions as part of an integrated system of compatible components, which may include a Mobile Insert / Liner, Femoral Head, and other Hip Prosthesis Components, in accordance with the approved IFU and Surgical Technique of the system.
Individual product codes for each size facilitate Implant Selection, Procurement, Inventory Management, Surgical Set Preparation, and Stock Control, while making identification of the required configuration clearer during surgical preparation.
What Is a Dual Mobility Total Hip Cup?
The Dual Mobility Total Hip Cup is an Acetabular Implant Component forming the acetabular side of an artificial hip joint within a Dual Mobility System.
Unlike conventional Single Articulation systems, the Dual Mobility concept incorporates two levels of movement within the Bearing Construct:
First Articulation
Between the Femoral Head and the compatible Mobile Bearing / Insert.
Second Articulation
Between the external surface of the Mobile Bearing and the internal surface of the Acetabular Cup.
This design provides a different Hip Articulation Geometry and offers an additional system option for Total Hip Reconstruction when considered appropriate for the clinical case.
Product Components and Design
- Acetabular Cup / Shell
The main external component forming the Acetabular Component, designed to be positioned within the Acetabulum according to the approved surgical technique.
Available sizes:
42 / 44 / 46 / 48 / 50 / 52 / 54 / 56 / 58 mm
- Internal Bearing Surface
The internal surface of the cup, designed to interact with the compatible Mobile Bearing Component within the Dual Mobility System.
- Mobile Insert / Bearing Component
Within the Dual Mobility Construct, a compatible Mobile Insert / Mobile Bearing is positioned between the Femoral Head and the Acetabular Cup.
The product image indicates a separate bearing component; however, its exact material and dimensions are not specified in the supplied product table.
- Femoral Head Interface
The supplied product data identifies a 28 mm Configuration for all available cup sizes.
Detailed compatibility between the Femoral Head and Mobile Insert should be confirmed using the approved Technical Documentation of the system.
- Cup Rim Geometry
The circumferential rim of the cup forms part of the geometry of the Dual Mobility Construct and functions within the range of motion defined by the system design.
Product Application
The Dual Mobility Total Hip Cup is used as part of Acetabular Reconstruction within:
Total Hip Arthroplasty / Total Hip Replacement
The cup is selected according to the surgeon’s evaluation and surgical planning, taking into consideration:
- Acetabular Anatomy
- Bone Stock
- Acetabular Diameter
- Cup Position
- Femoral Head Configuration
- Soft-Tissue Tension
- Hip Stability
- Range of Motion
- Preoperative Templating
- Intraoperative Assessment
The Dual Mobility Construct is completed using compatible components specifically designed for the system.
Final selection of the implant size, fixation method, and Bearing Combination should be determined by a Qualified Orthopedic Surgeon in accordance with the approved IFU and Surgical Technique.
Key Benefits
Dual Mobility Articulation
The Dual Mobility concept provides two levels of articulation within the artificial joint, distinguishing this design from a conventional Single-Bearing Configuration.
Multiple Cup Sizes
The product range is available in 9 Cup Sizes, providing a broad selection of options for Acetabular Sizing.
42–58 MM Size Range
The Cup Diameter ranges from 42 mm to 58 mm, accommodating a variety of Acetabular Dimensions.
Precise 2 MM Progression
The cup sizes increase in consistent:
2 mm increments
providing closely spaced options during Intraoperative Sizing.
28 MM Configuration
All cup sizes listed in the product table are associated with a:
28 mm Configuration
clearly defining the specified bearing configuration for this product family.
Flexible Implant Selection
The available size range supports:
- Preoperative Planning
- Acetabular Sizing
- Implant Selection
- Intraoperative Assessment
Organized Product Identification
Each configuration has an individual AMS Product Code, facilitating:
- Implant Identification
- Procurement
- Surgical Set Preparation
- Inventory Management
- Stock Control
Technical Specifications
| Product Code | Product Description | Cup Size | Configuration |
| AMS 189.028.042 | Dual Mobility Cup 42 × 28 MM | 42 mm | 28 mm |
| AMS 189.028.044 | Dual Mobility Cup 44 × 28 MM | 44 mm | 28 mm |
| AMS 189.028.046 | Dual Mobility Cup 46 × 28 MM | 46 mm | 28 mm |
| AMS 189.028.048 | Dual Mobility Cup 48 × 28 MM | 48 mm | 28 mm |
| AMS 189.028.050 | Dual Mobility Cup 50 × 28 MM | 50 mm | 28 mm |
| AMS 189.028.052 | Dual Mobility Cup 52 × 28 MM | 52 mm | 28 mm |
| AMS 189.028.054 | Dual Mobility Cup 54 × 28 MM | 54 mm | 28 mm |
| AMS 189.028.056 | Dual Mobility Cup 56 × 28 MM | 56 mm | 28 mm |
| AMS 189.028.058 | Dual Mobility Cup 58 × 28 MM | 58 mm | 28 mm |
Technical Overview
Product Name: Dual Mobility Total Hip Cup
Product Type: Dual Mobility Acetabular Cup
Product Category: Total Hip Arthroplasty Component
Application: Total Hip Arthroplasty / Total Hip Replacement
Bearing Concept: Dual Mobility
Cup Size Range: 42–58 mm
Available Cup Sizes: 42 / 44 / 46 / 48 / 50 / 52 / 54 / 56 / 58 mm
Size Increment: 2 mm
Associated Configuration: 28 mm
Number of Available Configurations: 9
Product Identification: Individual AMS Product Code for each size
Product Features
- Dual Mobility Acetabular Design
- Designed for use within compatible Total Hip Arthroplasty Systems
- Provides a Dual Articulation Concept within the Hip Bearing Construct
- Available in 9 Cup Sizes
- Cup Diameter Range: 42–58 mm
- Consistent 2 mm Size Progression
- All listed sizes are associated with a 28 mm Configuration
- Provides multiple options during Acetabular Sizing
- Supports Preoperative Templating and appropriate implant selection
- Provides additional options during Intraoperative Implant Selection
- Designed to function with compatible Mobile Bearing Components
- Forms part of a Modular Hip Reconstruction Construct
- Individual Product Code for each size
- Facilitates Implant Identification and Surgical Set Preparation
- Supports Inventory Management, Procurement, and Stock Control
- Provides an organized portfolio of different Dual Mobility Cup Sizes
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