坂上 知枝美, 喜地 慶雅, 椿田 久美子, 石野 善男, 佐藤 元彦
日本口腔科学会雑誌
41
(3),
542-552,
1992
A Protractor is an orthodontic device used for treating the maxillary retrusion. It utilized the orthopedic force created by the pulling of the maxilla and counterforce of the …
DOI
医中誌