The mandible of the patient the dentistry reform device which is kept at advance or projection position (100) being, the front mandibular this contact surface inside the buccal cavity which resists to mandibular retrusion by the fact that this it touches to the gum which covers the mandible (125) with, the front mandibular this contact surface inside the buccal cavity (125) with in addition to supporting in opposite direction, the gnathal this contact surface on the extraoral front and, it has. In order to resist to the revolution of the dentistry reform device which occurs due to the interaction of the front mandibular this contact surface inside the buccal cavity and the gnathal this contact surface on the upper extraoral front, the gnathal this contact surface on the rear inside the buccal cavity (140) it provides in the reform device. In order the upper gnathal this contact surface and/or relative position of the mandibular this contact surface, to conform to the condition of the user, it is possible to adjust.< Selective figure > Figure 1患者の下顎を前進又は突出位置で保持する歯科矯正装置(100)であって、下顎を覆う歯肉に当接することで下顎後退に抵抗する口腔内前方下顎当接面(125)と、口腔内前方下顎当接面(125)と反対方向に支える上顎外前方上顎当接面と、を備える。口腔内前方下顎当接面と上顎外前方上顎当接面との相互作用により発生する歯科矯正装置の回転に抵抗するために、矯正装置には、口腔内後方上顎当接面(140)を設ける。上顎当接面及び/又は下顎当接面の相対位置を、ユーザの条件に適合するよう調節してもよい。【選択図】 図1
