A text-book of dental histology and embryology including laboratory directions

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...of the subcutaneous tissue are built into the basal plate of cementum. As the tooth becomes larger and demands more support, there is added to the bone of the jaw that which Tomes has called bone of attachment. The osteoblasts build up additions to the jaw which surround and o11)1)0(1 the fibers, so that the fibers which.were originally in the subcutancous tissue are fastened to the bone at one end and to the cementum at the other. The evolutions of attachment by hinge joint and by gomphosis are therefore direct evolutions from the simple attachment in membrane. The form of ankylosis is also evolved from the simplest type, but in this case the bone of attachment is associated with the pulp, and the formation of bone and dentin become interlocked and united. CHAPTER XXII. THE PERIDENTAL MEMBRANE. In one sense the peridental membrane may be considered as the most important tissue to the dentist, for upon it the usefulness of the teeth and their comfort to the individual is dependent. It makes no difference how perfect a crown may be, or how perfectly any damage which may have occurred to it may have been restored, unless the peridental membrane is in a healthy and fairly normal condition, the tooth will be useless, and the individual would be much more comfortable without it. Definition.--The peridental membrane may be defined as that rtissue which fills the space between the surface of the root and the bony wall of its alveolus, surrounds the root occlusally from the border of the alveolus, and supports the gingiva?. It is necessary. to emphasize the three parts of the definition. The peridental membrane does not stop at the border of the bone, but continues to surround the root as far as the tissues are attached to it. In general, the dental profession has ...

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