The Double Thread Polyaxial Screw 5.5mm is a spinal fixation component intended for use within a compatible spinal instrumentation system. Pedicle screws are used in selected spinal stabilization procedures as part of a construct that may include connecting rods and other system-specific components. The appropriate application depends on the implant's intended use, the patient's anatomy, and the treating surgeon's clinical plan.

The product title specifies a 5.5 mm screw diameter, a double-thread design, a polyaxial configuration, and Grade 5 titanium construction. These details should be verified against the manufacturer's technical documentation, particularly before the screw is incorporated into a complete spinal fixation system.

Double-Thread Design

The screw is identified as having a double-thread configuration. Thread geometry can influence engagement with bone and the mechanical behavior of a fixation component. However, the exact thread pitch, thread profile, major and minor diameters, and meaning of the double-thread designation for this specific model are not provided in the title.

These technical characteristics should be confirmed through a manufacturer specification sheet or engineering drawing. The screw should be selected and used only in accordance with its documented design and intended application.

Polyaxial Head Configuration

A polyaxial pedicle screw generally incorporates a head that can pivot relative to the screw shaft within a defined range. This feature can provide flexibility when aligning compatible connecting rods and assembling a spinal fixation construct. The available angular range and locking mechanism vary by implant system and must be confirmed for this product.

The screw head interface is particularly important for compatibility. Connecting rods, set screws, drivers, and other components must match the specified system. Do not assume that components from different manufacturers or implant families are interchangeable.

Grade 5 Titanium Construction

The product title identifies Grade 5 titanium. This designation commonly refers to Ti-6Al-4V titanium alloy, which is used in various engineering and implant applications. The exact material specification, applicable standard, surface finish, and supporting documentation for this screw should be verified with the manufacturer.

Titanium alloys are valued for their strength-to-weight characteristics and corrosion resistance in appropriate applications. However, material designation alone does not establish regulatory approval, clinical suitability, or performance for a particular patient.

Spinal Fixation Applications

Polyaxial pedicle screws may form part of spinal fixation constructs used in selected procedures requiring stabilization. The suitability of a 5.5 mm screw depends on the manufacturer's stated indications, available lengths, bone anatomy, surgical plan, and compatibility with the complete fixation system.

The product title does not specify a particular spinal region, procedure, or approved indication. Qualified spinal surgeons should consult the manufacturer's instructions for use, technical specifications, contraindications, and system compatibility requirements before selecting an implant.

Handling, Storage, and Traceability

Confirm whether the screw is supplied sterile or non-sterile by reviewing its product labeling and accompanying documentation. Follow the manufacturer's requirements for storage, handling, inspection, preparation, and implantation. Do not use a product with damaged packaging or uncertain traceability.

Implant identification, lot or batch details, and applicable documentation should be maintained according to the healthcare facility's procedures. Do not reuse an implant labeled for single use, and do not assume that an item supplied non-sterile can be processed using an unvalidated sterilization method.

Ordering and Compatibility Checks

Before purchasing, verify the 5.5 mm diameter, available screw lengths, thread specifications, polyaxial head design, driver interface, compatible rods and locking components, material grade, and sterility status. Request an itemized specification sheet and confirmation that the screw belongs to the intended spinal fixation system.

Key Features

• Polyaxial pedicle screw configuration

• Listed 5.5 mm screw diameter

• Double-thread design, as specified in the product title

• Grade 5 titanium construction, as listed

• Intended for compatible spinal fixation systems

• Pivoting head design associated with polyaxial screws

• Designed for use with system-compatible instrumentation

• Screw length and thread geometry require confirmation

• Rod and locking-component compatibility must be verified

• Sterility status must be checked on product labeling

• Manufacturer instructions govern handling and use

Product Specifications

FAQs

1. What is a 5.5 mm polyaxial pedicle screw?

It is a spinal fixation implant with a specified 5.5 mm diameter and a head designed to pivot within a defined range. It is intended for use with a compatible spinal instrumentation system.

2. What does polyaxial mean?

Polyaxial refers to a screw-head design that allows angular movement relative to the screw shaft within the limits of the system. This can help with alignment during assembly of a compatible spinal construct.

3. What does double thread mean?

Double thread describes the screw's thread design, but the exact geometry can vary. Confirm the thread profile and technical specifications with the manufacturer.

4. What is Grade 5 titanium?

Grade 5 titanium commonly refers to the Ti-6Al-4V titanium alloy. The exact alloy designation and applicable material standard for this product should be verified through manufacturer documentation.

5. Is this screw compatible with every 5.5 mm spinal system?

No. Diameter alone does not establish compatibility. The screw head, rod interface, locking mechanism, driver, and other components must match the manufacturer's system specifications.

6. What screw lengths are available?

The product title does not specify the available lengths. Request the manufacturer's size chart or product catalog for the complete range.

7. What is this screw used for?

It may be used as part of a compatible spinal fixation construct in selected procedures. The specific indication must be confirmed through the manufacturer's instructions for use.

8. Is the screw supplied sterile?

The title does not specify sterility status. Check the product label and accompanying documentation before use.

9. Can the screw be reused?

Do not assume an implant can be reused. Follow the manufacturer's labeling and instructions, including any single-use designation.

10. What should be confirmed before ordering?

Verify screw diameter and length, thread geometry, polyaxial head interface, material specification, rod and driver compatibility, sterility status, and manufacturer documentation.