. Roentgen interpretation; a manual for students and practitioners . ownward or pockets in the antra inthe region of the upper bicuspids and molars nor with the sub-mental foramen which frequently overlies the apex of a lowerbicuspid. Films of the upper incisors occasionally show the shadowof the nostril overlying a root which simulates an abscess. Cysts.—Cysts are fairly common in the jaw. There are two forms:root cyst and dentigerous cyst. The former arises perhaps mostfrequently from an old alveolar abscess. It appears as a largerounded area of rarefaction in the jaw, usually attached to or
. Roentgen interpretation; a manual for students and practitioners . ownward or pockets in the antra inthe region of the upper bicuspids and molars nor with the sub-mental foramen which frequently overlies the apex of a lowerbicuspid. Films of the upper incisors occasionally show the shadowof the nostril overlying a root which simulates an abscess. Cysts.—Cysts are fairly common in the jaw. There are two forms:root cyst and dentigerous cyst. The former arises perhaps mostfrequently from an old alveolar abscess. It appears as a largerounded area of rarefaction in the jaw, usually attached to orpartially enclosing one or more tooth roots and showing little or noevidence of trabeculation. They may be multiple. Dentigerouscysts have a similar appearance except that they develop from aburied tooth bud and generally contain teeth or portions of bony structure of the jaws may be subject to any of the diseases 94 SKULL which affect the rest of the skeleton. Osteomyelitis is fairly commonand shows the same irregular destruction and proliferation seen. Fig. 6S.—Simple cyst of the jaw
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