Abstract
Muh shield（ YC3） was developed to improve the overjet and overbite in the primary dentition. However， there have been no reports on an annual growth amount evaluation using Muh shield in young anterior cross bite patients. As such， we have applied on Muh shield in 12 young patients with anterior cross bite. The aim of this study was to examine the treatment effects of the Muh shield in correcting a young anterior cross bite patient. The average values of an annual growth amount in 12 anterior crossbite patients show skeletal improvement. Specifically， mandible bone growth amount has controlled under the treatment period. The use of Muh shield might be effective because it has a function of tongue-up. As results indicate that the use of the Muh shield improves functional effects on the skeletal system.We will progress further study in the near future.
