定型試料(金型)を用いたレジン重合後の変形に関する研究
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概要
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In the course of some forty years since the adaptation of acrylic resin by liquid-powder polymerization in making dentures, modifications and improvements have been made in its properties and polymerization techniques. Although heat curing type resin with plaster cores is in main use currently, the use of pour type resin and self curing type resin in also on the increase clinically. Many reports have been made to date on the studies of these resins, but the matter that which polymerization technique may be the most clinically favorable still remains unsettled. In the present paper, therefore, an investigation was made of the effect on the resin test plates of the difference in the kinds of resin, cores, polymerization techniques. For the study, two types of experimental metal models of upper denture and resin test plates of heat curing type resin, pour type resin, and self curing type resin were prepared. The results obtained were as follows : 1. Measurement of thermal conduction of plaster, silicone and agar, used for cores, revealed that plaster showed the best conduction, under given conditions, then agar and silicone followed in order. 2. In dimensional accuracy and adaptability, self curing type resin was superior to heat curing type resin in both plaster core method and silicone core method. 3. As the core materials, silicone core method has less inner stress because of its smooth surface. On the other hand, this method was slightly inferior to plaster core method in dimensional accuracy and adaptability. 4. Heating factor during polymerization affected the dimensional accuracy and adaptability of the polymerized resin test plates. 5. Higher temperature for water-bath for submersion of the test plates after polymerization released inner stress sooner and at a high rate in time. 6. In the form of the resin test plates, shallow palate type showed less deformation rate and less degree of change with time.
- 九州歯科学会の論文
- 1979-03-31
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関連論文
- 流し込みレジンの重合時に生ずる変形の可能性について
- 定型試料(金型)を用いたレジン重合後の変形に関する研究
- 6. 定型資料を用いたレジン重合後の変形に関する研究(第 1 報)(第 37 回九州歯科学会総会講演抄録)