The invention discloses an upper jaw orthotic device, which comprises a first base block, a second base block, an adjusting screw, a second guide rod and a supporting wire rod.An adjusting screw and a guide rod are arranged between the two base blocks, and one end of the supporting wire is put through the base block, and the other end is connected to the tooth sleeve provided by the tooth which needs to provide the supporting force for the expansion and correction of the maxillary arch.When the two base blocks are locked in the patient's maxillary bone by bone nails, the expansion force provided by the lingual movement of the anterior teeth can be used to correct the maxillary arch and teeth.本創作揭露一種上頜矯正器，其包含第一基塊、第二基塊、一調整螺桿、二導引桿及支撐線材所構成。二基塊間設置有調整螺桿與導引桿，而支撐線材一端穿置於基塊，另端則銜接到欲擴張矯正上頜牙弓需提供支持力的牙齒所套設的牙套。當二基塊藉骨釘穿鎖於患者上頜的骨骼時，可利用調整螺桿及支撐線材及骨釘放置後對前牙產生舌側移動所提供的擴張力量對上頜牙弓及牙齒進行擴張矯正。
