| 单词 | impression compound |
| 释义 | > as lemmasimpression compound impression compound n. any impression material manufactured from a number of different ingredients, esp. one that is a non-elastic thermoplastic solid. ΘΚΠ society > occupation and work > materials > derived or manufactured material > synthetic resins and plastics > [noun] > other synthetics carborundum1891 impression compound1903 Mylar1952 carbon fibre1960 Kevlar1974 1903 Dental Rec. XXIII. 415 Do not think a good impression of a full denture cannot be taken in impression compound. 1904 J. H. Prothero Prosthetic Dentistry iii. 22 Other impression materials..are furnished by the dental supply houses and are called impression compounds. The usual claim made is that they are composed of materials that can be dried after the impression is taken. 1934 F. W. Frahm Princ. & Technics Full Denture Constr. vii. 84 A new impression compound has been added to our list of materials and is listed under the trade name of ‘Dentocoll’. It is a hydro-colloidal, possessing unusual plasticity, some elasticity and a slight compressibility. 1965 R. W. Phillips & E. W. Skinner Elem. Dental Materials v. 37 As the formulas of the modern impression compounds are ‘trade secrets’, any discussion of composition cannot by very specific. In general, compounds are a mixture of waxes, thermoplastic resins, a filler, and a coloring agent. < as lemmas |
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