Tap 4.0mm

This specialized orthopedic instrument set is designed for correcting moderate to severe thoracolumbar deformities (such as spondylolisthesis and scoliosis) using 4.75mm cobalt-chromium-molybdenum (CoCrMo) posterior rod-screw systems.

The set includes 21 core orthopedic tools that cover the entire surgical workflow—from spondylolisthesis reduction, coronal rod bending, and electric screw insertion to final locking—focusing on three-dimensional correction requirements.

The instruments are made of high-quality stainless steel, offering excellent corrosion resistance and biocompatibility.

With a core design philosophy of "High-Strength CoCrMo Compatibility + Precision Correction," the set incorporates dedicated reduction components, directional rod-bending tools, and an electric drive system to fully leverage the high-strength characteristics of 4.75mm CoCrMo rods and screws.

This enables precise three-dimensional deformity correction, improving correction accuracy by 40% compared to basic instrument sets.

Material Advantages

Main instruments are manufactured from premium stainless steels, including 05Cr17Ni4Cu4Nb, 465, 316L, and 304, providing high fatigue strength. Electropolished surfaces reduce tissue friction and damage.

Pedicle Screw Handling Tools

Pedicle Screw Holder: Features a non-slip jaw design compatible with 4.75mm system screw tulips, offering high clamping force to prevent screw slippage during reduction.

Electric Universal Screw Inserter + Electric Fixed Screw Inserter: Improve insertion efficiency compared to manual methods.

Dedicated Spondylolisthesis Reduction Components

Reduction Ball Nut + Reduction Plate: The ball nut, pedicle screw holder, and reduction plate work together via a lever mechanism to achieve controlled vertebral lifting. Combined with C-arm fluoroscopy, this allows precise correction of lumbar spondylolisthesis.

Short Connector + Long Connector: The short connector is suitable for single-level reduction, while the long connector enables multi-level coordinated lifting, offering better control compared to traditional reduction forceps.

Coronal Rod Bending and Rotating Tools

Left Coronal Rod Bender + Right Coronal Rod Bender: Specifically designed for coronal plane correction in spinal scoliosis. Used together, they enable high-precision bending.

Double-Joint Rod Rotator: Allows adjustment of 4.75mm rod orientation in confined surgical fields. Combined with rod benders, it supports a step-by-step correction strategy of "pre-bending + intraoperative fine-tuning," offering improved gripping force over single-joint designs.

Auxiliary and Storage Tools

Rod Pusher: Features rounded chamfers in the pressing groove to accurately seat 4.75mm rods into screw tulips, avoiding localized stress concentration and rod deformation.

Disconnector:

Enables quick separation of locked pedicle screw holders from screws, facilitating instrument removal in revision surgeries.

Instrument Case:

Designed with layered shock-absorbing compartments organized by surgical sequence: "screw insertion → reduction → rod bending → locking." Reduces tool retrieval time and improves organization.

Three-Dimensional Correction Capability: The combination of left/right coronal rod benders and the double-joint rod rotator enables precise scoliosis correction, enhancing three-dimensional deformity control.

Electric System Benefits: Electric screw insertors significantly improve efficiency compared to manual insertion.

Operational Safety: The anti-slip teeth on the pedicle screw holder reduce the risk of screw dislodgement; the spring mechanism in the disconnector prevents screw damage caused by forced separation.

Cost Efficiency and Reusability: One set accommodates full-range orthopedic procedures, reducing the need for level-specific instruments and lowering procurement costs. Low annual maintenance requirements further enhance long-term value.