The Poly Axial Spondylolisthesis Reduction Screw (8.0 mm) is a titanium spinal fixation implant designed for integration within compatible posterior spinal instrumentation and reduction systems according to the manufacturer’s approved indications and surgical technique.
The implant combines an elongated threaded bone-engagement shaft with a proximal polyaxial reduction-style fixation head. The polyaxial configuration is designed to permit controlled orientation of the head relative to the screw shaft within the mechanical limits of the compatible fixation system, while the extended reduction-style proximal geometry facilitates integration with compatible spinal rods during reduction and construct assembly.
According to the supplied catalog:
Material: Titanium
General Cat. No.: AMS 520.080.000
Nominal Diameter: 8.0 mm
The supplied table lists nine length configurations from 25 mm to 65 mm, allowing implant selection according to vertebral anatomy, bone dimensions, required fixation depth, screw trajectory, rod position, reduction requirements, fixation level, and construct geometry.
Each configuration carries a dedicated Cat. No. and GTIN No., supporting accurate implant identification, product traceability, surgical set preparation, procurement, inventory management, and stock control.
Product Explanation
The Poly Axial Spondylolisthesis Reduction Screw (8.0 mm) is a posterior spinal fixation screw designed for use within a compatible reduction and rod-based stabilization construct.
A simplified fixation concept can be represented as:
Vertebra → Polyaxial Reduction Screw → Compatible Spinal Rod → Locking Component → Posterior Spinal Fixation Construct
The threaded shaft provides mechanical engagement with vertebral bone, while the polyaxial reduction head provides the connection interface for compatible rods and locking components.
The precise reduction technique, rod positioning sequence, locking procedure, and permissible mechanical forces must follow the manufacturer’s approved Surgical Technique and Instructions for Use.
Product Components and Design
- Titanium Screw Body
The principal implant structure is manufactured from Titanium, according to the supplied product data.
- 8.0 MM Nominal Diameter
The product is specifically identified as:
Poly Axial Spondylolisthesis Reduction Screw (8 mm)
indicating a nominal 8.0 mm screw configuration.
- Threaded Bone-Engagement Shaft
The implant incorporates an elongated threaded shaft intended for mechanical engagement within vertebral bone.
The supplied catalog does not specify:
- Thread pitch
- Core diameter
- Thread depth
- Thread profile
- Self-tapping characteristics
- Polyaxial Fixation Head
The proximal fixation head is designed to provide controlled orientation relative to the screw shaft within the limits of the compatible spinal system.
This configuration can support rod alignment during construct assembly.
- Reduction-Style Extended Head
The implant is specifically designated as a Spondylolisthesis Reduction Screw and features an extended proximal head configuration intended for compatible spinal reduction constructs.
The supplied data does not define:
- Reduction travel
- Reduction range
- Extension-tab release mechanism
- Maximum permissible reduction force
- Final locking sequence
- Distal Tip
The distal section forms part of the threaded bone-engagement geometry.
- Length Configurations
The supplied catalog lists:
25 / 30 / 35 / 40 / 45 / 50 / 55 / 60 / 65 mm
Intended Use
The Poly Axial Spondylolisthesis Reduction Screw (8.0 mm) is intended for use within compatible posterior spinal fixation and reduction systems, according to the manufacturer’s approved indications and Instructions for Use.
Potential applications, where included within the approved indications, may include:
- Posterior spinal stabilization.
- Screw-and-rod fixation constructs.
- Reduction-type posterior spinal constructs.
- Spondylolisthesis-related stabilization where specifically approved.
- Multi-level spinal instrumentation.
- Spinal reconstruction procedures.
- Spinal deformity fixation constructs.
- Compatible posterior thoracic or lumbar fixation systems.
Selection of the appropriate screw configuration depends on vertebral anatomy, bone dimensions, bone quality, fixation depth, screw trajectory, rod positioning, reduction requirements, and overall construct geometry.
Key Benefits
Titanium Material
The supplied catalog specifies:
Material: Titanium
8.0 MM Reduction Screw Configuration
The implant is identified as a:
Poly Axial Spondylolisthesis Reduction Screw (8.0 mm)
Polyaxial Head Configuration
The proximal head provides controlled orientation relative to the screw shaft within compatible system limits.
Reduction-Style Head Geometry
The extended proximal configuration is designed for integration into compatible spinal reduction constructs.
Multiple Length Options
The supplied catalog lists:
25–65 mm
in regular 5 mm increments.
Nine Product Configurations
The supplied range contains:
9 individual screw lengths
Threaded Bone-Engagement Design
The implant incorporates an elongated threaded shaft for mechanical vertebral bone engagement.
Product Traceability
Each configuration includes an individual Cat. No. and GTIN No. to support:
- Implant identification
- Product traceability
- Surgical set preparation
- Procurement
- Inventory management
- Stock control
Technical Specifications
| Length | Cat. No. | GTIN No. |
| 25 mm | AMS 520.080.025T | 6221361022720 |
| 30 mm | AMS 520.080.030T | 6221361022751 |
| 35 mm | AMS 520.080.035T | 6221361022782 |
| 40 mm | AMS 520.080.040T | 6221361022812 |
| 45 mm | AMS 520.080.045T | 6221361022843 |
| 50 mm | AMS 520.080.050T | 6221361021457 |
| 55 mm | AMS 520.080.055T | 6221361021488 |
| 60 mm | AMS 520.080.060T | 6221361021518 |
| 65 mm | AMS 520.080.065T | 6221361021549 |
Technical Overview
Product Name: Poly Axial Spondylolisthesis Reduction Screw (8.0 mm)
Material: Titanium
Product Type: Polyaxial Reduction Spinal Fixation Screw
Product Category: Posterior Spinal Internal Fixation Implant
General Cat. No.: AMS 520.080.000
Nominal Diameter: 8.0 mm
Listed Lengths: 25–65 mm
Length Increment: 5 mm
Number of Listed Configurations: 9
Design: Threaded Screw with Polyaxial Reduction-Style Head
Fixation Concept: Posterior Screw-and-Rod Reduction / Stabilization Construct
Anatomical Application: Spine
Identification: Individual Cat. No. and GTIN No. for each listed length
Product Features
- Poly Axial Spondylolisthesis Reduction Screw Design.
- Manufactured from Titanium according to the catalog.
- Nominal diameter: 8.0 mm.
- Threaded shaft for vertebral bone engagement.
- Polyaxial proximal fixation head.
- Extended reduction-style head configuration.
- Designed for compatible posterior spinal fixation systems.
- Available in 9 listed length configurations.
- Listed length range from 25 to 65 mm.
- Regular 5 mm increments.
- Supports different fixation-depth requirements.
- Supports rod alignment within compatible system limits.
- Designed for integration with compatible rods and locking components.
- Individual Cat. No. for each listed length.
- Individual GTIN No. for each configuration.
- Supports implant identification, traceability, procurement, and inventory management.
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