Tweed Loop forming Pliers 14cm

The Tweed Loop Forming Pliers 14cm measure 140mm in overall length and are forged from surgical-grade stainless steel. The jaw assembly pairs two functionally opposite beaks: one three-section cylindrical barrel beak and one flat concave beak with parallel horizontal serrations. The cylindrical beak carries three graduated barrel diameters; 0.055 inches (1.4mm), 0.075 inches (1.9mm), and 0.090 inches (2.3mm), and its outer surface is electro-etched to prevent wire slippage during helix winding. The concave serrated beak holds the wire at a fixed 90-degree angle against the barrel while the loop is formed. Both jaw profiles are clearly visible in the close-up diagram on the product image.

Each barrel section produces a different helix coil diameter; the operator selects the section based on the target loop size and wire cross-section. The instrument handles rectangular wire up to 0.022″ × 0.025″ (0.56mm × 0.64mm) and compatible round wire gauges. The rivet-joint hinge keeps both jaw faces in matched alignment throughout repeated winding cycles. The Tweed Loop Forming Pliers 678-306 designation identifies this same three-section barrel geometry as the international catalog reference standard. The instrument is fully autoclavable at 134°C.

Orthodontists apply the Tweed Loop Forming Pliers 14cm during Tweed-Merrifield edgewise technique, forming bull loops and helical closing springs in rectangular stainless steel archwires for anchorage preparation and space closure mechanics. Loop diameter selection via the three-barrel steps eliminates repositioning between loop sizes within a single session.

Leader Surgical produces this instrument to verified dimensional tolerances on all three-barrel diameters, ensuring consistent helix output and repeatable spring force delivery across every clinical use. The Tweed Loop Forming Pliers platform remains a fixed reference in edgewise orthodontic technique globally.

What are the primary uses of these pliers?
They are primarily used to form Omega loops, “Bull” loops, helical loops, and various closing loops in archwires. They are also essential for making fine adjustments like torque and step bends during the finishing stages of treatment.