Principles and practice of operative dentistry . thus examined, but these results he thinks sufficientlyindicate the comparative hardness of the various classes. He believes these results will be confirmed by future investigation by this method,also by the method of scratching with different minerals. At present theindications seem to be fairly constant and support our contention that^^ereis a di^erence between •liard^ and soft^ teeth; that this difference is ca-pable of being measured ; and that the terms sclerotic and malacoticin their ZiYemZ meaning are justified. Diamond points of three de
Principles and practice of operative dentistry . thus examined, but these results he thinks sufficientlyindicate the comparative hardness of the various classes. He believes these results will be confirmed by future investigation by this method,also by the method of scratching with different minerals. At present theindications seem to be fairly constant and support our contention that^^ereis a di^erence between •liard^ and soft^ teeth; that this difference is ca-pable of being measured ; and that the terms sclerotic and malacoticin their ZiYemZ meaning are justified. Diamond points of three degrees of sharpness were used in the scle-rometer, attached to a graduated lever with weight attached. Theaverage weight required to scratch the enamel was as follows. Point Xo. 1. (Very Sharp.) Sclerotic teeth grammes. Malacotic teeth Point No. 2. (Bkint.) Sclerotic teeth grammes. Malacotic teeth Point No. 3. (Medium.) Sclerotic teeth Malacotic teeth * Prevention of Dental Caries and Oral Sepsis, p. Crack in theenamel Striation
Size: 2377px × 1052px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920
