Summit's custom-formed chin cups are available in high-pull and vertical-pull construction. Either variation can be made with or without spines for arch protraction.
Our chin cups and bonnets are still fabricated to the specifications set forth by Dr. Andrew J. Haas many years ago.
Because these chin cups conform to your patient's individual anatomy, they eliminate common irritation often caused by a "one-size-fits-all" style. And because they cover a much larger portion of your patient's chin, you benefit from added anchorage and stability.
We also make high-pull and vertical-pull bonnets that are designed to easily attach to the chin cups. The bonnets are constructed of soft, sturdy, brown, washable ribbon that's about 1-1/2" wide and padded with a layer of 1/4" foam for added comfort.
Orthopedics vs. Skeletal Open Bite
For the treatment of skeletal open bite, Dr. Andrew J. Haas recommends using headgear consisting of a vertical pull chin cup and bonnet. This headgear combination is capable of exerting heavy (3 to 6 pounds) force to the mandibular base. The effect of such force is similar to that produced by a misused Milwaukee brace.
Haas has often stated that his purpose in using the vertical pull chin cup is to
"1) cause depression of maxillary and mandibular buccal teeth, 2) resulting in
an inhibition of posterior alveolar growth. 3) Further to prevent the downward descent of the maxilla, perhaps to even push the entire maxilla superiorly.
4) Finally, it may even be possible that the morphology of the mandible is affected."
Whichever of these factors occur, either singularly or in multiplicity, the effect is a definite dental and probably skeletal bite closure without the use of vertical elastics.
Haas utilized the vertical pull chin cup in 1) all skeletal open bite cases and most dental open bite cases, and 2) following orthopedic maxillary expansion when the resulting bite opening is undesirable.
Haas has also demonstrated that using the vertical pull chin cup with protraction spines can 1) protract the entire maxilla subsequent to orthopedic maxillary expansion, and 2) protract either or both dental arches during conventional treatment.
In other words, Summit's vertical pull chin cup and bonnet were designed to assist you in making some of your most difficult problems relatively routine. It is recommended that the chin cup and bonnet be worn 12 to 14 hours daily.