| 摘要 |
FIELD: medicine. ^ SUBSTANCE: invention concerns dentistry and can be applied in post-resection palate defect prosthetics. Individual spoon is made of acrylic plastic by alabaster model of post-operation defect to obtain internal flaw pattern. Flaw impression is obtained by elastic alginate, operational model is made of hard alabaster. Operational model is duplicated, its copy made of fireproof mass. Obturator valve zone is modelled by applying heated wax at flaw edges to cover internal areas around the whole perimeter and by 10-15 mm into the flaw zone. In fireproof model a 10-15 mm wide hole is formed in obturator dome projection and covered by adhesive plaster from the model basement side. Flaw hollow is filled with fireproof mass to reach required palate level. Wax reproduction of metal basis part substituting palate is modelled by model compression with 0.3 mm thick clasp wax layer covering toothless areas of alveolar process. Basis restrictor is made along vestibular edge and at palate side of wax blank, and arched brackets for connection of plastic and metal prosthetic parts are made. Pouring gate system is created, mould box is made and metal part of prosthesis is moulded of super elastic alloy based on titanium nickelide. Fixation clams are made of titanium nickelide wire to match support teeth shape. Wax analogue of alveolar process is modelled on metal basis part to compensate for tissue atrophy. Artificial plastic teeth are installed, or wax reproduction of artificial teeth is made. Clams are installed in wax reproduction bulk. Prosthetic is cast in alabaster in bottom ditch part. Top ditch part is mounted and filled with liquid alabaster till complete alabaster solidification. Wax is removed by evaporation. Ditch is opened. Top ditch part is filled with acrylic plastic paste. Ditch halves are put together. Plastic undergoes polymerisation. Prosthetic is removed from the ditch, finished, polished and fitted in oral cavity. ^ EFFECT: enhanced match of prosthetic to palate bed, reduced teeth and periodontium exertion risk. ^ 2 tbl, 1 ex, 28 dwg |
