. Elementary and dental radiography / by Howard Riley Raper . Fig. 504. Transverse sections of large flatroot. A. Canal filled with disorganized pulptissue. B. Attempt to clean canal withdrills and broaches often digs a passagewaythrouch the disorganized canal contents. chemical methods ever> vestige of or-ganic tissue may be removed. Fig. 505. B. Self-limiting action of sulphuricacid solution on cancelous bone tissue. of sodium potassium on same Fig. 500. Some instruments used for the opening of root canals CANAL SURGERY AND ORAL INFECTION 485 Root Canals Tilling. By D
. Elementary and dental radiography / by Howard Riley Raper . Fig. 504. Transverse sections of large flatroot. A. Canal filled with disorganized pulptissue. B. Attempt to clean canal withdrills and broaches often digs a passagewaythrouch the disorganized canal contents. chemical methods ever> vestige of or-ganic tissue may be removed. Fig. 505. B. Self-limiting action of sulphuricacid solution on cancelous bone tissue. of sodium potassium on same Fig. 500. Some instruments used for the opening of root canals CANAL SURGERY AND ORAL INFECTION 485 Root Canals Tilling. By Dr. J. R. Callahan, Cincinnati, Ohio Colophony, resin, commonly known as rosin, is ohtaincd from tur-pentine hy distillation. In the process the oil of turpentine comes overand the rosin remains behind. Rosin varies in color from dark red-brownto black and white, according to its purity, and the degree of heat usedin its preparation. Chemically, it is the anhydrid of abietic acid. It hasthe physical and chemical properties common to all rosins. It softensat 176 degrees F. and fuses completely at 275 degrees F., is insoluble inwater; with difficulty is soluble in alcohol; freely soluble in chloroform,acetone, benzone, and fatty oils. The rosin that is best adapted to dental uses that I have been ableto find is that prepared by Barnardel for the use of the violinist. It isa French preparation, very near the color of dentin. The formula, asgiven below, makes a very
Size: 1494px × 1673px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookauthorraperhowardriley, bookcentury1900, bookdecade1910
