The Morelli Stainless Steel Twisted Wire .018″ is a 3-strand twist-flex CrNi (chrome-nickel) stainless steel wire supplied in straight 360 mm sticks. Morelli indicates twist-flex wire for the first stages of orthodontic treatment and for making lingual retainer bars. At .018″ (0,45 mm) it is the heavier of the two Morelli 3-strand twist-flex sticks — its larger section delivers more force and more rigidity, for later first-stage work and for sturdier bonded retainer bars.
Key Features
3-strand twist-flex construction — three strands twisted together instead of a single solid core, for light and resilient force delivery
Long range of deflection — the multi-strand build stays active over a much larger displacement than a solid wire of the same section
Heavier 3-strand section — more force and more rigidity than .015″, for the transition out of the initial alignment phase
Straight 360 mm sticks — enough length for a full arch or for a bonded lingual retainer bar
CrNi stainless steel — corrosion-resistant and formable, for bending retainer bars to the lingual anatomy
Supplied in packs of 10 sticks — practical stock quantity for routine chairside use
Technical Specifications
Material: CrNi (chrome-nickel) stainless steel
Wire Type: Twist-flex multi-strand (twisted) wire
Strands: 3
Nominal Size: .018″ (0,45 mm)
Format: Straight stick
Stick Length: 360 mm
Purpose: First stages of orthodontic treatment (alignment and leveling) and fabrication of lingual retainer bars
Certifications: FDA Approved, CE Approved, ISO 9001:2015, ISO 13485:2016
Country of Manufacture: Brazil
Package Includes: 10 straight sticks of 3-strand .018″ (0,45 mm) twist-flex CrNi wire, 360 mm each
Clinical Applications
Initial alignment and leveling in the first stage of fixed orthodontic treatment
Lingual retainer bars bonded to the lingual surfaces for post-treatment retention
Sturdier bonded retainers where a heavier bar is preferred over the lightest twist-flex section
Twisted wire or ligature wire?
Twist-flex .018″ is an archwire and retainer wire, not a tie — it is engaged in the bracket slot or bonded as a retainer bar, and is not interchangeable with single-strand ligature wire, which only ties the archwire in place. Choose .018″ when the case needs more force or a stiffer retainer bar; drop to .015″ for maximum flexibility in the most crowded arches.
