A quad helix is an appliance that is used to expand or widen out the upper teeth. There are several different types of expanders that orthodontists may use, but the quad helix has a few unique features that we’ll cover below.

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. [ 1 ]

The quad helix expander works by slowly pushing the teeth out which eventually widens the upper arch. A quad helix expander is typically used for patients who have a narrow top jaw, a cross bite and/or crowded teeth. The quad helix can be constructed as a fixed or a removable appliance.

Along with the utility arch and sectional mechanics, the quad helix appliance has become an integral part of the Bioprogressive technique. The quad helix is mostly used to unlock malocclusions and to establish normal function and arch form by expanding the dental arches.

What does a quad helix look like? A quad helix starts off as a straight stainless steel wire and is bent into shape by your orthodontist to create a customized appliance for you. This ‘U’ shaped appliance has four active helix springs— hence the name …

This case series aims to elaborate and discuss the use of the quad helix, a type of slow maxillary expansion appliance in the mixed dentition period in three different clinical scenarios.

Quad helix expanders are fixed orthodontic appliances that are designed to stimulate the upper teeth and allow the jaw to expand so that teeth can eventually be properly straightened. They are cemented to the molars and feature four active springs that widen the arch.

A quad helix is a fixed orthodontic appliance applied to the upper arch of the mouth to improve your smile by reducing crowded teeth. The quad helix expanders are commonly used in conjunction with orthodontic treatments, providing the space needed to move teeth into their optimal position.

The Quad Helix is an appliance used to expand the palate. It is cemented by bands on the six-year molars, and is activated at each visit until the adequate expansion is obtained. After this, the appliance must be worn for approximately three months before it is removed.

Quad Helix. A Quad Helix, somewhat similar to a palate expander is a fixed expander for the upper jaw to straighten teeth. However, unlike a palate expander, no key is required to activate a quad-helix. The appliance is cemented to the molars …