Emotional Prodigality. [Volume: 21, Issue: 7, July, 1879, pp. 359-371]

EMOTIONAL PRODIGALITY.

359

or plate of new dentine (or secondary dentine, as it is commonly
called), the tubular and inter-tubular substance of which is continuous with that of the older tissue, and thus the tubes of the two parts
are continuous, although at the point of junction they are often
marked by a slight dilatation."
S. James A. Salter, in his "Dental Pathology and Surgery," New
York, 1875, says, " Considering secondary dentine as applicable to all
the after-formations of dentine by which the pulp-cavity is diminished
or obliterated, I would subdivide it into dentine of repair, dentine
excrescence, and ostco-dentine. I first suggested the arrangement
in the 'Guy's Hospital Reports' for 1853. Osteo-dentine and dentine
excrescence are not infrequently seen in teeth that are worn, and
exhibit dentine of repair. Dentine of repair, however, always forms
upon that portion of the pulp-cavity next to the lesion, and is adherent and in direct structural continuity with the primary dentine,
whereas osteo-dentine and dentine excrescence occur almost always
first towards the extremity of the root, and the former is frequently
quite detached from the remainder of the dentine."
Mr. Salter asserts against Tomes (p. 68), that " the circumstance
of age, per se, is really not efficient for the production of secondary
dentine; and the fact that the teeth which exhibit secondary dentine
are usually from aged subjects is merely accidental, and dependent
upon the fact that it is in them that the teeth are most worn. Dentine excrescences are little nodules of secondary dentine, occasionally
found attached to the interior of the pulp-cavities of teeth which
may be otherwise healthy, unassociated with injury or other disease.
Osteo-dentine is a form of secondary dentine in which the tissue combines the characters both of bone and ivory. It is developed by the
general conversion and intrinsic calcification of the several tissues of
the pulp. It is usually vascular; it is frequently arranged in systems
around vessels, like the Haversian systems in bone, and it sometimes
contains true lacuna."
(To be continued.)
EMOTIONAL PRODIGALITY.
BY C. FAYETTE TAYLOR, M.D., NEW YORK.
(Read before the New York Odontological Society, March 18, 1879.)
WHEN the New York Odontological Society honored me with an
invitation to read a paper before it on the subject of " Necrosis," I
think I may assume that they did not intend to restrict me to any
beaten track of thought or research; for, if they desired a resume of
our present knowledge of the morbid process denominated necrosis,