منابع مشابه
Wear of dental amalgam.
The wear of cental amalgam was studied by single- and double-pass sliding and by a silicon carbide abrasion test. A dispersed amalgam showed significantly better resistance to two-body abrasion than the spherical amalgams tested. The wear amalgam was determined by resistance to penetration and by a ductile mode of surface failure over the load range studied. Differences in the wear of amalgam a...
متن کاملMicrostructure of dental amalgam.
Numerous studies have been done in the past to identify the phases present in dental amalgam. Both metallographic and X-ray diffraction techniques have been used.-' Most researchers now presume that dental amalgam consists mainly of three phases. The original particle is an alloy of Ag, Sn, Cu, and sometimes Zn; the major portion is the compound Ag3Sn, which is often referred to as Py. After am...
متن کاملDental amalgam--environmental aspects.
Increasing knowledge about the risk of toxic effects caused by anthropogenic mercury accumulation in ecosystems has resulted in a growing pressure for reduction of the discharge of mercury waste. Consequently, the mercury waste problems of dental clinics have been given increased attention, and restrictions on handling and discharge of contaminated waste have been established in several countri...
متن کاملViscoelastic Behavior of Dental Amalgam *
Measure ments made on dent a l a malgam in tens ion indica te th at a malga m exhib its three types of vi scoelasti c phe nome na: (1) inst antaneous e las ti c s tra in , (2) re ta rded e las ti c st ra in (transie nt c reep), and (3) viscous s train (s teady state c reep). T he co mbina tion of e lasti c plus re ta rded strain can be repre· sent ed by a n eq uation of the form f = A(T + 8 '(J...
متن کاملBrittle fracture of dental amalgam.
The brittleness of dental amalgam limits its use to sites in which tensile stresses can be kept at a minimum. If the cause for the brittleness could be ascertained, then an approach to correct this problem could be devised. Physical properties of metals are ultimately manifested in, and can be explained by, their microstructure. Through the work of several researchers,1-3 means of identifying t...
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ژورنال
عنوان ژورنال: THE JOURNAL OF THE STOMATOLOGICAL SOCIETY,JAPAN
سال: 1961
ISSN: 1884-5185,0300-9149
DOI: 10.5357/koubyou.28.359