PROBLEM TO BE SOLVED: To solve problems in a conventional fixed device in which root resorption with enlargement using artificial force or a load causes growth of a crooked jawbone and a facial bone, and thereby a risk of occurrence of complication such as scoliosis in the future is pointed out.SOLUTION: An impression of all upper and lower jaw teeth is taken, and the occlusal relationship of the upper and lower teeth is taken by fitting silicone-based bite registration materials. A lower jaw plaster model made by the impression of the upper and lower jaws is used, and a plastic disk is pressure molded by a pressure molding machine, and then the segmentation of a mouthpiece is performed along the row of teeth. Next, a dental self-curing resin is built up by a brush-on technique in a mandibular milk molar occlusal surface portion so as to become a thickness (approximately around 2 mm) corresponding to the amount of an interocclusal clearance. An upper jaw plaster model is lightly press contacted right before the self-curing resin is completely cured, and the form of a maxillary milk molar occlusal surface is impressed. Burrs of resin caused by the impressing operation are removed. A resin portion is polished again and immersed in the warm water of approximately 40°C for approximately five minutes. Then a surplus monomer is washed away, and the final curing is achieved.COPYRIGHT: (C)2015,JPO&INPIT【課題】従来の固定式装置では、人工的な力、もしくは負荷を使用した拡大に伴う歯根吸収や、歪んだ顎骨及び顔面骨の成長になることから、将来的に脊柱側彎などの合併症が生じる危険性が指摘されている。【解決手段】上下顎全歯牙の印象を採得し、上下歯牙の咬合関係を、シリコーン系咬合採得材を嵌合させて採得する。上下顎の印象から作製された下顎石膏模型を使用し、プラスティックディスクを加圧成型機にて加圧成型し、歯列に沿ってマウスピースの切り出しを行う。次に下顎乳臼歯咬合面部分に歯科用即時重合レジンを、安静空隙量に相当する厚さ(約2mm程度)になるように筆積みにて築盛する。重合レジンが完全に硬化する直前に上顎石膏模型を軽く圧接し、上顎乳臼歯咬合面の形態を印記する。この印記操作によって生じたレジンのバリを除去し再度レジン部分の研磨を行い、約40℃の温湯に約5分間浸漬して余剰モノマーを流失させ、最終硬化をはかる。【選択図】図1
