Objective: The aim of this study was to describe a new device for upper molar distalization using a core device supported by 2 miniscrews at the midpalatal area.
Case: Class II malocclusion patients were treated using a miniscrew supported core device* activated by a TMA or stainless steel spring connected to the lingual sheaths of the molar bands. All cases showed distalization movement of the upper molar with torque and rotation control, minimal tipping and no undesirable side effects.
Discussion and Summary: Miniscrew supported distalizing devices had become increasingly popular to correct Class II malocclusion in noncompliance patients. Palatal miniscrews seem to be a good alternative when facing little buccal interradicular spaces or great amount of distalization is needed. The appliance showed effective distalization of the upper molars in a simple mechanics with no need for a laboratory step. The cases showed fast movement of the upper molars with torque and rotation control, possibility of applying intrusion force if vertical control is needed during distalization and also the device allows bilateral or unilateral tooth movement.
*Core device is a generic name and the device is produced by Peclab, Belo Horizonte, Brazil (patent pending)