Pedicle Screw System Instruments Set – Monoaxial and Polyaxial Posterior Spinal Fixation

The Pedicle Screw System Instruments Set from Peak Surgicals (SKU: PS-OP-5799, PS1700 series) is a posterior spinal pedicle screw-rod fixation instrumentation set for both monoaxial and polyaxial screw configurations, designed for the complete open posterior lumbar and thoracic spinal fusion workflow — covering pedicle pathway preparation with a Pedicle Awl, Pedicle Tester Straight, Pedicle Tester Curved, Pedicle Probe Straight, and Pedicle Probe Bent; pedicle tapping with three taps (φ4.5mm, φ5.5mm, φ6.5mm); monoaxial and polyaxial screw insertion with dedicated screwdrivers; rod contouring with a Rod Template and rod management with a Rod Holder, Rod Rocker, Rod Rotator ×2, Rod Pusher Open, and Rod Pusher Close; Inner Holder for tulip set screw engagement; Torque Wrench and T-Handle Quick Coupling; segmental Compressor and Distractor; Reduction Screw Cutter; and Reduction Clamp for deformity correction, with an optional Screwdriver T25 for Polyaxial Screws (PS1700.154) and Tap φ7.5mm (PS1700.158) available separately. It is used by spine surgeons and neurosurgeons performing open posterior pedicle screw-rod fixation for lumbar degenerative disease requiring fusion, spondylolisthesis, thoracolumbar fracture stabilisation, and spinal deformity correction.

PS1700 Series: Monoaxial and Polyaxial Pedicle Screw Fixation for Open Posterior Surgery

The PS1700 Pedicle Screw System Instruments Set is configured for open posterior spinal surgery using both monoaxial and polyaxial screw head designs — the two primary pedicle screw head architectures used in posterior lumbar and thoracic fixation. A polyaxial screw head allows the rod to be seated in the tulip at any angle within a cone of motion, compensating for the variation in screw trajectory between levels and reducing the need for precise rod contouring to match every screw-to-screw angle; the Polyaxial Screwdriver (PS1700.029) is designed for the specific head geometry of the polyaxial screw. A monoaxial screw has a fixed tulip-to-shaft alignment requiring the rod to be more precisely contoured to the screw trajectories at each level; the Monoaxial Screwdriver (PS1700.025) engages the monoaxial head. The set includes dedicated pedicle pathway instruments, rod management instruments, and both screw head screwdrivers, making it compatible with mixed monoaxial-polyaxial constructs used in deformity correction where monoaxial screws provide controlled rod-to-screw leverage at the apex levels while polyaxial screws accommodate trajectory variation at other levels. The optional Screwdriver T25 for Polyaxial Screws (PS1700.154) provides T25 Torx drive compatibility for polyaxial screw designs using a T25 set screw socket.

Pedicle Pathway Preparation: Awl, Testers, and Probes

The Pedicle Awl (PS1700.073) establishes the initial cortical entry at the pedicle entry point on the posterior surface of the transverse process-pedicle junction, guided by fluoroscopy and anatomical landmarks. The Pedicle Tester Straight (PS1700.009) and Pedicle Tester Curved (PS1700.013) advance through the pedicle cancellous bone and into the vertebral body along the correct screw trajectory — the straight tester is used for straight pedicle trajectories in the lumbar spine, and the curved tester is used for the more lateral and angulated pedicle trajectories in the thoracic spine and for selected lumbar levels requiring a convergent approach. After the tester has established the pedicle channel, the Pedicle Probe Straight (PS1700.093) and Pedicle Probe Bent (PS1700.097) assess the integrity of the pedicle channel walls — the probe tip is passed along all four walls of the channel to confirm that the cortex is intact in the medial, lateral, superior, and inferior directions before tapping and screw insertion. The three standard taps — φ4.5mm (PS1700.041) for small thoracic pedicles, φ5.5mm (PS1700.045) for standard lumbar pedicles, and φ6.5mm (PS1700.049) for large lumbar and L5-S1 pedicles — pre-cut the pedicle channel thread before screw insertion. The optional Tap φ7.5mm (PS1700.158), available at extra cost, extends the tap range for maximum-diameter screws in the ilium or large L5-S1 pedicles. The T-Handle Quick Coupling (PS1700.065) and Quick Coupling Handle (PS1700.077) drive all quick-connect instruments.

Rod Management: Template, Holder, Rocker, Rotator, and Pushers

The Rod Template (PS1700.021) is a malleable trial rod used to measure the required rod length and curvature intraoperatively — it is bent to match the screw head positions across the instrumented levels and then used as a template to contour the definitive rod before insertion. The Rod Holder (PS1700.005) grips the rod for controlled introduction into the posterior wound. The Rod Rocker (PS1700.001) adjusts the rod laterally to align it with screw tulip heads that are not perfectly positioned in the rod's path — a rocking motion of the instrument seats the rod into the tulip without requiring removal from adjacent seated tulips. The two Rod Rotators (PS1700.033) rotate the seated rod around its longitudinal axis in deformity correction cases where axial rod rotation is part of the correction manoeuvre — two instruments are used simultaneously, one at each end of the rod segment, to provide controlled rotation without rod bending. The Rod Pusher Open (PS1700.037) seats the rod into the screw tulip at each level with direct contact against the rod body. The Rod Pusher Close (PS1700.053) seats the rod using a closed-channel geometry for tulip access in constrained positions. The Inner Holder (PS1700.017) engages the set screw in the tulip head to prevent rotation of the screw body during set screw tightening, and secures the set screw during the driving step.

Torque Wrench, Reduction Instruments, and Compressor/Distractor

The Torque Wrench (PS1700.057) applies calibrated final torque to the set screw at each pedicle screw level after the rod is fully seated, ensuring consistent locking across the entire construct. The Compressor (PS1700.109) applies controlled compression between adjacent instrumented levels along the seated rod — closing the disc space at a treated level, increasing lordosis, or achieving a compression arthrodesis configuration. The Distractor (PS1700.121) applies distraction between adjacent levels for foraminal height restoration, kyphosis correction, or spondylolisthesis reduction before final rod locking. The Reduction Screw Cutter (PS1700.105) trims extended screw tulip arms after tightening. The Reduction Clamp (PS1700.150) is used in deformity correction cases to grip the screw tulip and apply a direct reduction force to bring a displaced vertebra toward the rod, particularly in spondylolisthesis reduction where a grade II or higher spondylolisthesis requires the anterolisthesed vertebra to be pulled posteriorly into the rod path before the set screw can be tightened.

CE Mark, ISO 13485, and FDA Certification for Pedicle Screw Instrumentation Procurement

The Pedicle Screw System Instruments Set is manufactured under CE Mark, ISO 13485, and FDA compliant quality standards. ISO 13485 certification confirms Peak Surgicals operates a documented quality management system covering design control, material traceability, and production consistency for spinal surgical instruments. CE Mark confirms conformity with European medical device regulations, and FDA compliance supports procurement for US-based hospitals, spine surgery centers, and neurosurgical departments requiring verified regulatory documentation.

Product Specifications

Frequently Asked Questions

What is the difference between monoaxial and polyaxial pedicle screws and why does this set include screwdrivers for both?
A polyaxial pedicle screw has a tulip head that can pivot in any direction relative to the screw shaft within a cone of motion of approximately 25–30°, allowing the rod to be seated in the tulip regardless of minor variations in screw trajectory between levels. This makes rod insertion easier in standard fusion cases where the screw trajectories vary between levels. A monoaxial pedicle screw has a fixed tulip-to-shaft alignment — the tulip opening faces in a fixed direction determined by the screw trajectory in the bone, requiring the rod to be precisely contoured to match every screw position along the construct. Monoaxial screws are used when the surgeon needs to translate a vertebral segment toward the rod (as in spondylolisthesis reduction) or to control a precise rotational correction vector (as in scoliosis correction). Many posterior spinal fusion constructs use a combination of both types. The PS1700 set includes a dedicated screwdriver for each design to ensure correct engagement with both screw head geometries.

What is the Reduction Clamp used for?
The Reduction Clamp (PS1700.150) is used in cases where a pedicle screw has been inserted into a vertebra that is significantly displaced from the rod's path — most commonly in high-grade spondylolisthesis (grade II or greater) where the anterolisthesed vertebra's screw head is positioned anteriorly and inferiorly relative to the rod connecting the adjacent vertebrae. After the rod is passed through the other screw tulips, the Reduction Clamp grips the displaced screw's tulip and applies a posteriorly directed reduction force, pulling the vertebra toward the rod until the tulip engages the rod and the set screw can be tightened. This instrument converts the distraction-rod tension mechanism into a direct reduction force at the level of the displaced vertebra. In deformity correction, the Reduction Clamp also allows the surgeon to translate individual vertebrae toward the rod during the coronal plane correction manoeuvre.

How does this PS1700 set differ from the other pedicle screw sets available from Peak Surgicals?
Peak Surgicals offers four pedicle screw instrumentation sets. The PS series Spinal Pedicle Screw System ($1,705.00) uses taps φ4.0–7.0mm with a rod bender, in-situ bending iron, and parallel spreader/compressor — a general-purpose open surgery set. This PS1700 Pedicle Screw System Instruments Set (PS-OP-5799, $1,538.90) covers taps φ4.5–6.5mm (φ7.5mm optional), includes monoaxial and polyaxial screwdrivers, and adds a Reduction Clamp and Rod Rotators for deformity correction cases. The Spinal Pedicle Screw Set 5.5mm (2200-13xx, $1,815.00) is specifically configured for MIS percutaneous surgery with a 5.5mm Persuader, Fixation Pins, and 12 N.m Torque Wrench. The Spinal Pedicle Screw Set 6.0mm (PS-OS-00300-70, $2,198.90) is for open surgery with a 6.0mm rod and includes Feelers for Screw Channel and a Parallel Spreader and Compressor. The PS1700 set is the most affordable of the four at $1,538.90 and is specifically suited to centres performing both standard fusion and deformity correction with mixed monoaxial-polyaxial constructs.

What is the Pedicle Tester and how does it differ from the Pedicle Probe?
The Pedicle Tester (Straight: PS1700.009; Curved: PS1700.013) is a narrow, tapered instrument advanced through the pedicle cancellous bone to create the initial pedicle channel before tapping — it is the first instrument to traverse the full pedicle from the posterior entry point to the anterior vertebral body, establishing the trajectory and depth of the pedicle channel. The Pedicle Probe (Straight: PS1700.093; Bent: PS1700.097) is used after the channel has been established by the tester — it is passed into the completed channel and rotated to palpate all four walls of the cortex, detecting any cortical breach by the difference in tactile resistance between intact cortex and a cortical defect. The probe assessment confirms wall integrity before the wider-diameter tap and screw are introduced. Both instrument types are needed: the tester creates the pathway, the probe assesses it.

What certifications does this set carry?
The Pedicle Screw System Instruments Set is manufactured under CE Mark, ISO 13485, and FDA compliant quality standards. ISO 13485 certification confirms Peak Surgicals operates a documented quality management system covering design control, material traceability, and manufacturing consistency for spinal surgical instruments. CE Mark confirms conformity with European medical device regulations, and FDA compliance supports procurement for US hospitals, spine surgery centers, and neurosurgical departments requiring verified regulatory documentation for pedicle screw instrumentation purchases.