The American text-book of operative dentistry / in contributions by eminent authorities.
- Edward Cameron Kirk
- Date:
- [1905]
Licence: Public Domain Mark
Credit: The American text-book of operative dentistry / in contributions by eminent authorities. 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.
26/916 page 20
![curve from front to rear, of (greater or less dogrcc in different forms of the arch. Thus it is hit^dj at the ineisors, curving downward at the bicus- pids, reaching its k)west ])()int at the first niokir; it cuirves upwanl raj)- idly at the second molar, and is highest, again, at the third. In the rounded arcli the pUme is more flattened, and it exhibits the extreme Fig. 4. The horizon of the line of occlusidn and plane of occlusion. downward curve in the square arch. Between these extremes there is of course every variety of modification. The form of the plane of occlusion is shown in Fig. 4, C Fig. 5. The apposition of the upper and lower teeth. The tendency of the bolus of food is toward the lowest part of the curve at the region of the lower first molar, so that the extraction of this tooth always affects the performance of mastication. In the apposition of the teeth of the opposite jaws the mechanical](https://iiif.wellcomecollection.org/image/b21216617_0026.jp2/full/800%2C/0/default.jpg)
