| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1992: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1991: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Research Abstract |
We felt it a necessity to study the superstructure of implants, and to develop some type of new dental material that would act as a shock absorber to decrease the amount load impact upon the implant the surrounding tissue.
The newly innovated synthetic resin was made mainly of Urethane Dimethacrylate with a combination of modified UDMA. Furthermore, organic composite filler was employed. In comparison to the Isosit-N, the enamel-dentin resin layer displayed hight values for bending strength and elastic modulous, while compressive strength and hardness remaine about the same, and lower values were observed in relation to impact strength, abrasion by brusing, and polimerization shrinkage.
In the biological valuation, results no adverse effect in terms of toxicity test, sensitivity test and mucosa menbrane irritant test.
Stress distribution depending on the material and shape of the superstructure of bioactive glass implants were analyzed by the finite element method to observe its function and stability. Applied force in the center of the occlusal plane should be at a 75ﾟ-105ﾟangle. However if force is to be applied on the out er oblique planes of the buccal cusp, the force should be at a 105ﾟ-120ﾟangle. Thus making it a prospective material for future use in the superstructure of implants and hope for a better prognosis.
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