. Plastics and plastic filling; as pertaining to the filling of all cavities of decay in teeth below medium in structure, and to difficult and inaccessible cavities in teeth of all grades of structure. and disagreeably; the amal-gam adheres in specks upon the sides, and it is impossible toremove it completely. In ground glass mortars, the face iseasily kept nicely clean, and the amalgam mass is readilyremoved without much effort.| The pestle should also be of glass, and the glaze shouldnot be removed from any portion. It is also much better thatthe little knob on the small end of the pestle be
. Plastics and plastic filling; as pertaining to the filling of all cavities of decay in teeth below medium in structure, and to difficult and inaccessible cavities in teeth of all grades of structure. and disagreeably; the amal-gam adheres in specks upon the sides, and it is impossible toremove it completely. In ground glass mortars, the face iseasily kept nicely clean, and the amalgam mass is readilyremoved without much effort.| The pestle should also be of glass, and the glaze shouldnot be removed from any portion. It is also much better thatthe little knob on the small end of the pestle be broken off andthe pestle be inserted into a wooden handle — hard wood — asthis gives one more power for making the amalgam.* Having the filings and mercury in the mortar, and havingcarefully removed any particles of amalgam which may beadherent to the pestle from previous makings, the filingsshould be gradually incorporated with the mercury. Thisis done by retaining the mercury in the centre of the bottomof the mortar, and by a circular motion, occasionally reversed, * Glass pestles are now made which have proved even more satisfactory thanthose with wooden handles. f See Appendix, Sec.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdentistryoperative
