@article{oai:shinshu.repo.nii.ac.jp:00044704, author = {山川, 祐喜子 and 高谷, 達夫 and 横井, 由紀子 and 山川, 洋子 and 岡添, 忍 and 山木, 貴子 and 大須賀, 直人 and 岡藤, 範正 and YAMAKAWA, YUKIKO and TAKAYA, TATSUYA and YOKOI, YUKIKO and YAMAKAWA, YOUKO and OKAZOE, SHINOBU and YAMAKI, TAKAKO and OSUGA, NAOTO and OKAFUJI, NORIMASA}, issue = {1}, journal = {松本歯学, Journal of the Matsumoto Dental University Society}, month = {Sep}, note = {Although functional jaw orthopedic appliances have been used to treat anterior cross bite during the growth and development period, its functional effect for severely anterior cross bite has not been clarified. Cases treated with a myofunctional training device for deciduous tooth anterior cross bite have been reported, but normally, these devices are not used to improve occlusion of patients with severly anterior cross bite. The patient was an 8-year and 4-month-old boy with Skeletal 3 anterior cross bite, Terminal plane Mesial step type with -3 mm over jet and +6 mm over bite, and ANB of -3.0° and U1 to SN of 86°. We proposed the conventional treatment method, but active treatment was rejected due to various background factors, and consent could not be obtained. Thus, we proposed the use of a myofunctional training device and consent was obtained. The attached device guided the abnormal pressure of various muscles of the oral cavity in an appropriate direction and promoted forward development of the upper jaw. ANB improved to +1.0°, curvature of Spee was flattened, and labial inclination of the upper teeth and inferior backward growth of the mandible were observed, which improved coverage of the upper tooth region that the patient most strongly desired., application/pdf}, pages = {33--42}, title = {成長期の反対咬合に対して筋機能訓練装置の影響と効果を認めた 1 例}, volume = {45}, year = {2019} }