de Carvalho R C, Matson E
Departamento de Dentistica da Faculdade de Odontologia, Universidade de São Paulo.
Rev Odontol Univ Sao Paulo. 1990 Apr-Jun;4(2):113-8.
The author studied the stress distribution which occurs in casted metalic restoration a gold alloy type II and a copper-aluminum, with cavity preparation of both types: intracoronal or extracoronal cavity using the finite elements method in a first right inferior molar. The conclusion was that the mechanical performance of both are very similar. Stress occurred in a dental structure which alloy cast restoration are smaller than that occurred in a tooth without cavity preparation. The cavity preparation with intracoronal shows a better stress distribution in the dentine than that with extracoronal. In the region near the buccopulpal line angle occurs a stress concentration in despite of the type of the cavity metallic alloy used.
作者使用有限元方法，对一颗右下第一磨牙进行两种类型的窝洞预备（冠内或冠外窝洞）后，研究了铸造金属修复体（II型金合金和铜铝合金）中的应力分布。结论是两者的力学性能非常相似。合金铸造修复体在牙体结构中产生的应力小于未进行窝洞预备的牙齿。冠内窝洞预备在牙本质中的应力分布比冠外窝洞预备更好。无论使用何种金属合金和窝洞类型，在颊髓线角附近区域都会出现应力集中。
