A text-book of dental histology and embryology, including laboratory directions . Adult dentition. Note the distance from the apices of the incisors to the lowerborder of the mandible and the floor of the nose. are wider than those of the teeth that were lost, and theyconsequently exert pressure upon the mesial surfaces of thelaterals, pushing them apart and carrying them upward andforward. Study the relation of the lower centrals, laterals, and 404 THE TEETH AND DEVELOPMENT OF THE FACE cuspids in the development of the arches at from six to tenyears. Notice that the roots of the central are n
A text-book of dental histology and embryology, including laboratory directions . Adult dentition. Note the distance from the apices of the incisors to the lowerborder of the mandible and the floor of the nose. are wider than those of the teeth that were lost, and theyconsequently exert pressure upon the mesial surfaces of thelaterals, pushing them apart and carrying them upward andforward. Study the relation of the lower centrals, laterals, and 404 THE TEETH AND DEVELOPMENT OF THE FACE cuspids in the development of the arches at from six to tenyears. Notice that the roots of the central are not fullyformed, that the lateral lies to the lingual of the temporarylateral root, and with its mesio-occlusal angle below thedistal surface of the central. The development of the cuspidhas pushed the crypt floor through the cancellous boneuntil it has reached the solid cortical plate, and still the for-mation of the crown is not quite completed. The six teeth Fig. 314. Edentulous jaws, showing loss of alveolar process. form a triangle of which the centrals are the apex, and thecortical plates from cuspid to cuspid the base. The com-pletion of the roots of these teeth will carry the temporaryteeth, alveolar process and all, upward, forward, and out-ward, thus increasing the distance from the mental foramento the symphysis and enlarging the arc of the law fromcuspid to cuspid. In the same skull notice the relation of the upper incisorsand cuspids to the corresponding temporary teeth. They lie THE GROWTH OF THE JAWS 405 to the lingual of the roots of the temporary teeth, the lateral alittle to the lingual of the central and cuspid. The cuspid haspushed back the floor of its crypt until it is braced againstthe solid bone at the base of the malar process. The growthof these teeth will first cause the temporary teeth to moveocclusally, the bone growing from the border of the processto follow them. In this growth the distance from cuspidto cuspid is increa
Size: 1636px × 1528px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectteeth, bookyear1912
