The Cancellous Screw 4 MM Partially Threaded [TIT] is a component used within Orthopedic Internal Fixation systems. It is designed as a bone screw with a nominal diameter of 4 mm and a Partial Thread Configuration for use in Cancellous Bone Fixation applications according to the approved indications and surgical technique.
The screw design incorporates a Distal Threaded Section together with an unthreaded portion of the shaft. This geometry distinguishes a Partially Threaded Screw and provides an option within fixation constructs requiring thread engagement in a specific region of bone. This type of design may also be used within a Lag Screw Technique when appropriate for the clinical case and surgical technique.
According to the supplied product data, the product carries the designation [TIT], indicating a Titanium Material Category, and is available in six different lengths: 24, 26, 28, 30, 35, and 40 mm. The range of available lengths allows the surgeon to select the appropriate Screw Length according to Bone Anatomy, Fixation Depth, Screw Trajectory, Fragment Thickness, and intraoperative measurements.
Each length carries an individual AMS Product Code, facilitating Implant Identification, Surgical Set Preparation, Procurement, Inventory Management, and Stock Control.
Product Description
A Cancellous Screw is an Orthopedic Bone Screw designed to achieve thread engagement within areas of cancellous bone.
A Partially Threaded Design means that the screw thread does not extend along the entire screw body, leaving part of the shaft unthreaded.
The current product is characterized by the following primary specifications:
- Nominal Diameter: 4 mm
- Partially Threaded Design
- TIT Material Category
- Length Range: 24–40 mm
The appropriate length and method of use are selected according to the fixation site and surgical plan.
Product Components and Design
- Screw Head
The proximal portion of the screw, designed to engage with the compatible Driver or Instrument during insertion.
- Drive Interface
The screw head incorporates an Instrument Engagement Feature that allows application of Insertion Torque during screw placement.
The specific Drive Interface type and dimensions are not defined in the supplied product table.
- Smooth / Unthreaded Shank
The unthreaded portion of the screw body, which distinguishes the Partially Threaded Screw from a Fully Threaded Screw.
- Cancellous Threaded Section
The distal threaded portion is designed to achieve Mechanical Engagement within Cancellous Bone.
The available product data do not specify:
- Thread Pitch
- Core Diameter
- Thread Length
- Thread Profile
Therefore, these specifications should not be stated without official technical documentation.
- Distal Tip
The distal end of the screw is designed to advance through the bone pathway according to the approved Surgical Technique.
- TIT Material Category
The screw is classified as:
[TIT]
indicating a Titanium Material Category according to the catalogue nomenclature.
The exact Titanium Grade or Alloy Composition is not specified in the available product data.
Product Application
The Cancellous Screw 4 MM Partially Threaded [TIT] is used within Internal Bone Fixation applications requiring a compatible cancellous screw.
According to the approved indications, it may be incorporated into:
- Cancellous Bone Fixation
- Fracture Fragment Fixation
- Internal Fixation Constructs
- Bone Fragment Stabilization
- Lag Screw Fixation, when appropriate for the clinical case and surgical technique
Selection of the appropriate screw depends on:
- Bone Anatomy
- Bone Quality
- Fixation Site
- Fragment Thickness
- Screw Trajectory
- Required Screw Length
- Intraoperative Measurement
The appropriate size and method of use should be determined by a Qualified Orthopedic Surgeon in accordance with the approved IFU and Surgical Technique.
Key Benefits
4 MM Cancellous Design
A nominal diameter of 4 mm within the cancellous bone screw category for compatible orthopedic fixation applications.
Partially Threaded Geometry
Combines a Threaded Distal Section with an Unthreaded Shank to accommodate specific fixation requirements.
Multiple Length Options
Available in six lengths:
24 / 26 / 28 / 30 / 35 / 40 mm
providing multiple options according to bone depth and fixation trajectory.
TIT Material Category
The product is classified as TIT according to the supplied catalogue data.
Intraoperative Selection Flexibility
The range of available lengths supports selection of the Final Screw Length according to measurements obtained during the surgical procedure.
Clear Implant Identification
Each length has an individual AMS Product Code, facilitating:
- Implant Identification
- Screw Selection
- Surgical Set Preparation
- Procurement
- Inventory Management
- Stock Control
Technical Specifications
| Product Code | Product Description | Nominal Diameter | Total Length |
| AMS 104.274.024T | Cancellous Screw 4 MM Part. Threaded [TIT] | 4 mm | 24 mm |
| AMS 104.274.026T | Cancellous Screw 4 MM Part. Threaded [TIT] | 4 mm | 26 mm |
| AMS 104.274.028T | Cancellous Screw 4 MM Part. Threaded [TIT] | 4 mm | 28 mm |
| AMS 104.274.030T | Cancellous Screw 4 MM Part. Threaded [TIT] | 4 mm | 30 mm |
| AMS 104.274.035T | Cancellous Screw 4 MM Part. Threaded [TIT] | 4 mm | 35 mm |
| AMS 104.274.040T | Cancellous Screw 4 MM Part. Threaded [TIT] | 4 mm | 40 mm |
Technical Overview
Product Name: Cancellous Screw 4 MM Partially Threaded [TIT]
Product Type: Partially Threaded Cancellous Bone Screw
Product Category: Orthopedic Internal Fixation
Nominal Diameter: 4 mm
Thread Configuration: Partially Threaded
Material Category: TIT / Titanium Category
Available Lengths: 24 / 26 / 28 / 30 / 35 / 40 mm
Length Range: 24–40 mm
Number of Configurations: 6
Primary Application: Cancellous Bone Fixation
Identification: Individual AMS Product Code for each length
Product Features
- 4 MM Cancellous Bone Screw
- Partially Threaded Design
- Classified as TIT – Titanium Category
- Distal Threaded Section designed for engagement within cancellous bone
- Smooth / Unthreaded Shank as part of the partial-thread design
- Available in 6 Length Configurations
- Length Range: 24–40 mm
- Provides multiple options during Intraoperative Screw Selection
- Allows selection of screw length according to Bone Depth and Fixation Trajectory
- May be used within a Lag Screw Technique when appropriate for the clinical case and surgical technique
- Designed for use within compatible Orthopedic Internal Fixation Constructs
- Individual Product Code for each length
- Facilitates Implant Identification and Surgical Set Preparation
- Supports Procurement, Inventory Management, and Stock Control
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