The Morelli Micro Sectional Screw 5mm is a unilateral orthodontic expansion screw rated for a 5 mm opening. It is designed so that movement is delivered to one side of the appliance, for corrections confined to a segment of the arch.
Key Features
Unilateral action — the manufacturer classifies this as a one-sided expansion screw, so the corrective movement is applied to a single segment
Small footprint — a 10.5 mm × 4.6 mm × 3 mm body
5 mm opening — rated at a 5 mm opening, with a 3 mm expansion dimension
Anti-reverse mechanism — the mechanism keeps the screw from turning back on its own once it has been advanced
Secure locking system — the position reached after each activation is held in place
Stainless steel build — manufactured in stainless steel
Technical Specifications
Material: Stainless steel
Opening: 5 mm
Expansion: 3 mm
Body Dimensions: 10.5 mm × 4.6 mm × 3 mm
Quantity: 1 piece
Purpose: Unilateral, segment-limited expansion in orthodontic appliances
Certifications: FDA Approved, CE Approved, ISO 9001:2015, ISO 13485:2016
Country of Manufacture: Brazil
Package Includes: 1 expansion screw
Clinical Applications
Single-segment correction where only one side of the arch is to move.
Asymmetric crossbite management confined to a limited number of teeth.
Localized space opening within a short stretch of the arch.
Is the problem on one side of the arch only?
A unilateral 5 mm screw applies the movement where it is planned and leaves the rest of the arch alone.
