Quain's elements of anatomy . Fig. 483. ?—Different stages in the foumation of an upper molar tooth with twoFANGS (from Blake). 1, the distinct caps of dentine for five cusps in the eailiest stage of formation ; in 2,and the remaining figures, the crown is downwards ; in 2, and 3, the formation of thecrown having proceeded as far as the neck, a bridge of dentine stretches across the baseof the tooth-pulp ; and in 4, the division of the fangs is thus completed ; in 5, 6, and7, the extension takes place in the fangs. 558 THE TEETH. thickness by additions in its interior, while the substance of t
Quain's elements of anatomy . Fig. 483. ?—Different stages in the foumation of an upper molar tooth with twoFANGS (from Blake). 1, the distinct caps of dentine for five cusps in the eailiest stage of formation ; in 2,and the remaining figures, the crown is downwards ; in 2, and 3, the formation of thecrown having proceeded as far as the neck, a bridge of dentine stretches across the baseof the tooth-pulp ; and in 4, the division of the fangs is thus completed ; in 5, 6, and7, the extension takes place in the fangs. 558 THE TEETH. thickness by additions in its interior, while the substance of the pulp decreases inproportion. This growth of the tooth continues until the crown is completed ofits proper width, and then the pulp underg-oes a constriction at its base to formthe cervix of the tooth, and afterwards elongates and becomes narrower, so as toserve as the basis of the fang. Sooner or later, after the completion of the crown,this part of the tooth appears through the gum, whilst the growth of dentine tocomp
Size: 3205px × 780px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
