The Modular Head for Total Hip Prosthesis range consists of a family of Stainless Steel Modular Femoral Heads designed for use within compatible Total Hip Arthroplasty / Total Hip Replacement systems. The modular head represents the spherical portion of the Femoral Construct and connects to the Femoral Stem to form the femoral side of the artificial hip joint.
The range is available in three different Femoral Head Diameters: 22 mm, 28 mm, and 32 mm. Each diameter is offered in three Head Configurations: Short, Medium, and Long, providing a total of 9 Implant Configurations.
This variety allows the surgeon to select the appropriate Head Diameter and configuration during Preoperative Planning and Intraoperative Trialing, while maintaining compatibility with the other components of the Hip Prosthesis System and supporting the requirements of Hip Biomechanics Reconstruction.
Once the modular head is assembled onto the Compatible Femoral Stem, its external spherical surface functions as the articulating femoral head within the Compatible Acetabular Cup / Liner, forming the Hip Articulation / Bearing Couple.
Each configuration is assigned an individual AMS Product Code, facilitating product identification, preparation of the required surgical components, Inventory Management, Procurement, and Stock Control.
What Is a Modular Head for Total Hip Prosthesis?
A Modular Head, also referred to as a Modular Femoral Head, is an implant component that represents the artificial femoral head in a hip replacement system.
It is mounted onto the compatible Femoral Stem through a Modular Connection / Taper Interface, while its external spherical surface articulates within the Acetabular Bearing Component to provide movement of the artificial hip joint.
The Modular Design allows the femoral head to be selected separately from the stem within the compatibility limits of the system, providing the surgeon with multiple options when assembling the Final Femoral Construct.
The range is available in:
- 22 MM Modular Ball Head
- 28 MM Modular Ball Head
- 32 MM Modular Ball Head
Each diameter is available in:
- Short
- Medium
- Long
Product Components and Design
- Spherical Femoral Head
The main spherical body of the implant, forming the Femoral Articulating Surface.
Available in three diameters:
22 mm – 28 mm – 32 mm
- Stainless Steel Body
The material specified in the supplied product data is:
Stainless Steel
This is the material used for the Modular Ball Heads listed in the product table.
The specific Stainless Steel Grade or applicable material standard is not provided in the supplied data.
- Internal Modular Bore
An internal cavity within the Femoral Head, designed to receive the compatible portion of the Femoral Stem.
- Modular / Taper Interface
The connection interface used to assemble the head with the Femoral Stem within the Modular Hip System.
The Taper Type, Taper Size, and Taper Angle are not specified in the available data. Therefore, specific values should not be published without consulting the approved Technical Datasheet.
- Head / Neck Configuration
Each Femoral Head Diameter is available in three options:
Short – Medium – Long
These configurations allow selection of the appropriate Head Position / Neck Configuration within the compatible options of the system.
Product Application
The Modular Head for Total Hip Prosthesis is used as part of the femoral side in:
Total Hip Arthroplasty (THA) / Total Hip Replacement
It is mounted onto a Compatible Femoral Stem to form the femoral head of the artificial joint.
The Femoral Head then articulates with the compatible Acetabular Cup or Liner to create the Articulating Bearing Couple responsible for movement of the artificial hip joint.
Selection of the appropriate diameter and configuration depends on surgical factors including:
- Preoperative Templating
- Femoral Stem Selection
- Acetabular Bearing Compatibility
- Femoral Offset
- Leg Length
- Soft-Tissue Tension
- Joint Stability
- Range of Motion
- Intraoperative Trial Reduction
The Final Implant Configuration should be determined by a Qualified Orthopedic Surgeon in accordance with the approved IFU and Surgical Technique of the system.
Key Benefits
Multiple Head Diameters
The product range provides three Femoral Head Diameter options:
22 / 28 / 32 mm
offering multiple Bearing Configurations within the Hip Prosthesis System.
Short, Medium & Long Options
Each diameter is available in:
Short – Medium – Long
providing additional flexibility during Intraoperative Trialing and selection of the final head configuration.
Modular Femoral Construct
The modular design allows the femoral component to be assembled using a compatible Stem and Head within the surgical system.
Hip Biomechanics Reconstruction
The available head configurations provide the surgeon with options when assessing and adjusting elements of Hip Reconstruction, including:
- Leg Length
- Femoral Offset
- Soft-Tissue Balance
- Joint Stability
Stainless Steel Construction
All configurations listed in the product table are identified as Stainless Steel Modular Heads.
Clear Implant Identification
An individual Product Code for each diameter and configuration facilitates:
- Implant Identification
- Surgical Set Preparation
- Inventory Management
- Procurement
- Stock Control
Technical Specifications
Modular Ball Head 22 MM [Stainless Steel]
| Product Code | Description | Head Diameter | Configuration |
| AMS 180.022.128 | Modular Head for Total Hip Stainless Short | 22 mm | Short |
| AMS 180.022.228 | Modular Head for Total Hip Stainless Medium | 22 mm | Medium |
| AMS 180.022.328 | Modular Head for Total Hip Stainless Long | 22 mm | Long |
Modular Ball Head 28 MM [Stainless Steel]
| Product Code | Description | Head Diameter | Configuration |
| AMS 180.028.128 | Modular Head for Total Hip Stainless Short | 28 mm | Short |
| AMS 180.028.228 | Modular Head for Total Hip Stainless Medium | 28 mm | Medium |
| AMS 180.028.328 | Modular Head for Total Hip Stainless Long | 28 mm | Long |
Modular Ball Head 32 MM [Stainless Steel]
| Product Code | Description | Head Diameter | Configuration |
| AMS 180.032.128 | Modular Head for Total Hip Stainless Short | 32 mm | Short |
| AMS 180.032.228 | Modular Head for Total Hip Stainless Medium | 32 mm | Medium |
| AMS 180.032.328 | Modular Head for Total Hip Stainless Long | 32 mm | Long |
Technical Overview
Product Name: Modular Head for Total Hip Prosthesis
Product Type: Modular Ball Head / Modular Femoral Head
Product Category: Total Hip Prosthesis Component
Application: Total Hip Arthroplasty / Total Hip Replacement
Material: Stainless Steel
Available Head Diameters: 22 / 28 / 32 mm
Available Configurations: Short / Medium / Long
Configurations per Diameter: 3
Total Available Configurations: 9
Connection Concept: Modular Femoral Stem Interface
Articulation: Compatible Acetabular Bearing Component
Identification: Individual AMS Product Code for each configuration
Product Features
- Modular Femoral Head Design for use within a Total Hip Prosthesis
- Manufactured from Stainless Steel according to the supplied product data
- Three different Head Diameters: 22, 28, and 32 mm
- Three configurations for each diameter: Short, Medium, and Long
- A total of 9 Implant Configurations
- Spherical design intended for Hip Articulation
- Designed for use with a Compatible Femoral Stem
- Articulates with a Compatible Acetabular Bearing Component to form the artificial joint
- Provides flexibility during Intraoperative Trialing
- Offers multiple options when selecting the Final Femoral Head
- Supports assessment of Leg Length and Femoral Offset during Hip Biomechanics Reconstruction
- Individual Product Code for each configuration
- Facilitates Implant Identification and Surgical Set Preparation
- Supports organized Implant Inventory, Procurement, and Stock Management
- Designed for use within a compatible Modular Total Hip Prosthesis System
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