Principles and practice of operative dentistry / by John Sayre Marshall.

  • Marshall, John Sayre, 1846-1922.
Date:
1901
Catalogue details

Licence: Public Domain Mark

Credit: Principles and practice of operative dentistry / by John Sayre Marshall. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    The deciduous teeth are twenty in number, ten in each jaw, and are expressed by scientists in the following formula : 9 9 11 99 I. - - C. ^^ - ]\I. ^ ^ = 20. 22 11 2 2 The formula is read as follows, beginning at the median line : incisors? two above, two below ; cuspids, one above, one below ; molars, two above, two below, which equals ten on either side of the median line, or twenty in all. Fig. 2. 1 ^ 2 '« 3 M II 4 Deciduous teeth of the left side. (Gray.) 1 and 2, incisors ; 3, euspidati; 4 and 5, molars. The permanent teeth of man are thirty-two in number, sixteen in each jaw, the formula for which is written thus : I. ?? C. ii B. ~? M. -- = 32. Permanent teeth of the right side. (Gray.) 1, third molars ; 2, second molars; 3, first molars; 4, second bicuspidati; 5, first hicuspidati; 6, euspidati; 7, lateral incisors ; 8, central incisor;. Beginning at the median line, it reads as follows : incisors, two above, two below; cuspids, one above, one below ; bicuspids, two above, two