QUAD HELIX (orquadhelix) is an orthodontic appliance for the upper teeth that is cemented in the mouth.
It is attached to the molars by 2 bands and has two or four active helix springs that widen the arch of the mouth to make room for crowded teeth, or correct posterior cross-bite, where lower teeth are buccally placed (outer) in comparison to the upper teeth.
It is usually made from 0.036” stainless steel wire and is primarily indicated in mixed dentition, cleft patients and those with childhood history of thumbsucking.
A variety of this appliance is inserted into attachments that are welded to the bands, by which the orthodontist can adjust the appliance without removing the bands.
It is a fixed slow-expansion orthodontic appliance with only one anterior coil. It is less efficient than the quadhelix appliance and limited to the treatment of narrow or high palatal vaults or a combination of both.
DURATION REQUIRED FROM LAB : 1 day
REQUIREMENT FOR LAB : Upper and lower( type 3) dental stone models without voids made from good alginate impression
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