Quad helix

A quad helix (or quadhelix) 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 a posterior cross-bite, where lower teeth are buccal (outer) than upper teeth. It is usually made from 38 mil stainless steel wire and is primarily indicated in mixed dentition, cleft patients and those that have performed the act of thumbsucking. A variety of this appliance is inserted into attachments that are welded to the bands. In this way the orthodontist can adjust the appliance without removing the bands. for mixed dentiton

单词	Quad helix
释义	Quad helix 英语百科 Quad helix A quad helix (or quadhelix) 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 a posterior cross-bite, where lower teeth are buccal (outer) than upper teeth. It is usually made from 38 mil stainless steel wire and is primarily indicated in mixed dentition, cleft patients and those that have performed the act of thumbsucking. A variety of this appliance is inserted into attachments that are welded to the bands. In this way the orthodontist can adjust the appliance without removing the bands. for mixed dentiton
随便看	third trimester的意思 third trimester of pregnancy的意思 Third Trimester Pregnancies的意思 Third Trimester Pregnancy的意思 third trimester的意思 Third trochanter的意思 Third umpire的意思 third umpires的意思 third valvulae的意思 third variable的意思 third variation的意思 Third ventricle的意思 third ventricle cyst的意思 third ventricle of cerebrum的意思 third ventricle posterior portion tumor的意思 Third ventricles的意思 third ventricles bloodflow ultrasonic detector的意思 third virial coefficient的意思 third virus的意思 third voltage range的意思 third wardrobe的意思 Third wave的意思 Third Way的意思 Third Wheel的意思 third wheels的意思