The diseases of the human teeth : their natural history and structure : with the mode of applying artificial teeth, etc., etc. / by Joseph Fox and Chapin A. Harris ; with two hundred and fifty illustrations.
- Joseph Fox
- Date:
- 1855
Licence: Public Domain Mark
Credit: The diseases of the human teeth : their natural history and structure : with the mode of applying artificial teeth, etc., etc. / by Joseph Fox and Chapin A. Harris ; with two hundred and fifty illustrations. Source: Wellcome Collection.
Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)
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![be separated into two lamellae, the external of which is rather of a loose and spongy texture, and possessed of vascularity; the internal lamella is more smooth, and is also vascular: the membranes derive their vessels from their gums, and the pulps receive theirs from the artery which passes through the jaw. Some preparations, in the injection of which I have very happily succeeded, fully warrant the above state- ment in all its variations from those of Mr. Hunter or Dr. Blake the author of an inaugural dissertation, published in Edinburg in 1798, containing many excellent physio- logical remarks on the formation of the teeth. Mr. Hun- ter observes, that the external membrane is soft and spongy, without vessels, the other much firmer, and extremely vascular. Dr. Blake says, they (the mem- branes) can easily be separated into two lamellae, the external of which is spongy and full of vessels; the inter- nal one is more tender and delicate, and seems to contain no vessels capable of conveying red blood. In several preparations which are minutely injected, taken from the human subject, and also from the foetal calf, I have found both the lamellae to be very vascular.* The manner in which the permanent teeth derive their origin, was never properly understood until described by Dr. Blake, and is a discovery which shews very accurate observation. [The supposed discovery of Dr. Blake with regard to the manner of the formation of the permanent teeth, is said to have been made twenty years before, by a French dentist by the name of Herbert.] When the rudiments of the temporary teeth are some- what advanced, a new sac is given off at the upper and posterior part of their membranes. These sacs are at * Plate X. Fig. 1, 2, 3, 4.](https://iiif.wellcomecollection.org/image/b21120559_0045.jp2/full/800%2C/0/default.jpg)
