Orthodontia, or malposition of the human teeth : its prevention and remedy.

  • Guilford, Simeon Hayden, 1841-1919.
Date:
[1893]
Catalogue details

Licence: Public Domain Mark

Credit: Orthodontia, or malposition of the human teeth : its prevention and remedy. 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.

    46/244 (page 38)
    Torsion and Overlapping. Fig. 8. Torsion with Space. This torsion may be associated with an overlapping of the adjacent tooth as shown in Fig. 7, or there may be a space between the two as shown in Fig. 8. fig. 7. In either case the twisted tooth occupies a less space at the line of the cutting edge than it should. By al- lowing this condition to remain,when the pressure of the later erupting teeth begins to be felt, these teeth will be pressed still closer together and the irregularity be confirmed. Subsequently, when tlae correction of the condition is attempted, there will not be sujSicient room to accommodate the tooth in its wider aspect and the adjoining teeth will have to be pressed apart or the arch expanded to obtain the necessary room; whereas, if the tooth had been turned in its socket before the eruption of the other teeth the operation would have been a very simple one. Again, when an incisor erupts so as to occupy a position inside of the arch in the upper jaw, or outside of it in the Fig. 9. lower, and the tooth be held in such position by the antagonizing teeth, immediate interference and correction is de- manded in order to pre- vent the complications that would result from the partial or complete closure of the space in- tended for the accom- modation of the mal- Inlocked Laterals. pOSed tOOth. Fig. 9 shows a case of this character with both laterals inlocked. The superior central incisors sometimes erupt in such a manner that their cutting edges form an angle at the median