阿摩線上測驗
複選題
44.關於石膏結合（gypsum-bonded）包埋材料的敘述，下列何者正確？
(A)是高溫包埋粉
(B)溫度超過700℃時，部分材料會分解而脆化鑄造合金
(C)第二類型（Type II）用來鑄造嵌體（inlay）與牙冠（crown）
(D)調拌時，水粉比率增加，其凝固膨脹與吸濕性膨脹（setting and hygroscopic expansion）也會增加
答案：登入後查看
統計： A(103), B(1270), C(1050), D(235), E(0) #3135111
統計： A(103), B(1270), C(1050), D(235), E(0) #3135111
詳解 (共 2 筆)
7fD2xA
#7284598
ISO 7490:1990 Dental gypsum-bonded casting investments for gold alloys
- Type 1: Thermal expansion type, for casting inlays and crowns
- Type 2: Hygroscopic expansion type, for casting inlays and crowns
- Type 3: For casting complete and partial denture bases
ISO 7490:2000 Dental gypsum-bonded casting investments
- Type 1: For casting inlays and crowns. （1990年的type 1和2合併）
- Type 2: For casting complete and partial denture bases.
ISO 15912:2016 Dentistry — Refractory investment and die material（現行標準）
- Type 1, for the construction of inlays, crowns and other fixed prostheses;
- Type 2, for the construction of complete or partial dentures or other removable appliances;
- Type 3, for the construction of casts used in brazing procedures;
- Type 4, for the construction of refractory dies.
C選項是可以不給分的，如97-2-52。
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