A treatise on the diseases and surgical operations of the mouth, and parts adjacent; with notes of interesting cases, ancient and modern / Translated from the French of M. Jourdain.

  • Jourdain, M. (Anselme Louis Bernard Bréchillet), 1734-1816.
Date:
1849
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the diseases and surgical operations of the mouth, and parts adjacent; with notes of interesting cases, ancient and modern / Translated from the French of M. Jourdain. Source: Wellcome Collection.

    42/418 (page 40)
    as scrofula, syphilis or scurvy, than from any defect in the teeth themselves. A fall or blow may injure the antrum at this ten- der age. I have shown how the roots of some teeth penetrate into the sinus ; but this never happens with the milk teeth. The crowns of these teeth are scarcely formed and presented above the alveolus, before the crowns of the permanent teeth throw themselves, as it were, from the side of the alveolar ridge, compressing and forming the intermediate substance, which separates them from the teeth of first dentition. This move- ment, at first imperceptible, soon affects the fangs of the milk teeth, and spreads them on either side, causing them to bend and twist, so as to embrace, as it wrere, the crowms of the teeth of replacement. It is from this peculiar arrangement that these teeth do not project into the antrum, as do those of adults in the cases mentioned above. [The fangs of all teeth retain the shape of their first forma- tion, except where incidentally modified by absorption or exos- tosis. The action of the crowns of the permanent set upon the fangs of the temporary would be to occasion absorption of the latter, and not change of direction. We may here remark that the researches of M. Bourdet render it highly probable that this wasting of the temporary roots is caused, not immediately by the mechanico-vital action of the corresponding permanent crown,but through the medium of an intervening “carneous bud- like body.” This body he considers to be a portion of the sac of the permanent tooth, assuming, when the occasion requires, an increased vascularity, and acting as an absorbing agent for the removal, not only of the superincumbent fangs, but of all else that may oppose the egress of the tooth. The peculiar arrangement of the roots, as spoken of by M. Jourdain, is given to them at the time of their ossification, for their better adaptation to the pulp sacs of the permanent teeth, then already formed.] It occasionally happens, from some peculiarity of the alveolar ridge, or of the roots of the milk teeth, or from the firm texture of the maxillary bone, that the fangs of the teeth of replace- ment, or of the permanent molares, meet with too great a resist-