File:The Dental cosmos (1914) (14764835571).jpg

Identifier: dentalcosmos5619whit (find matches)
Title: The Dental cosmos
Year: 1914 (1910s)
Authors: White, J. D McQuillen, J. H. (John Hugh), 1826-1879 Ziegler, George Jacob, 1821-1895 White, James William, 1826-1891 Kirk, Edward C. (Edward Cameron), 1856-1933 Anthony, L. Pierce (Lovick Pierce), b. 1877
Subjects: Dentistry Dentistry
Publisher: Philadelphia, S. S. White Dental Manufacturing Co
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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LE. As has been said before, the paramolartubercle does not occur as frequently in BOLK.—SUPERNUMERARY TEETH IN THE MOLAR REGION EN MAN. 165 the mandible as it does in the maxilla.On the other hand, we find in the lowermolars the phenomenon of a supernu-merary tooth in concrescence with thenormal molar, which I have not beenable to establish with certainty in themaxilla. Whenever a paramolar tubercleoccurs in one of the lower molars, thenthis tubercle frequently proves its origi-nal significance of being an independenttooth by its possessing a proper root, on the buccal surface of the tooth, start-ing from the crown as an independentroot, the crown itself no longer exhibit-ing any trace of a paramolar tubercle.Not every lower molar with three roots,however, should be classed with thisgroup, because bifurcation of the anteriorroot may have taken place. If one hasan ample collection of specimens at hisdisposal, he can readily decide whetherthe presence of three roots in a lower Fig. 1
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which I would term paramolar root.In upper molars this occurs very rarely.In the lower molars, however, it happensnot infrequently that no tubercle is pres-ent in the crown, but instead we findthe supernumerary root, the paramolarroot. In proof thereof, in Fig. 17 sometwenty lower molars are reproduced. Tnthe top row no paramolar tubercle is tobe noted, yet we observe how the para-molar root gradually becomes longer andstronger, until in the last molars of thisseries it is as long as the two normalroots. The second row shows sevenmolars in which the paramolar root isstill more strongly developed than in thetop row; this root is seen to be situated molar is due to bifurcation of the an-terior root or to the addition of a para-molar root. In the bottom row in Fig.17, seven molars are reproduced, inwhich, besides the paramolar root, theparamolar tubercle on the crown is alsodeveloped. The last three molars in thebottom row, especially, show that theparamolar tubercle and the paramolarroo

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