Title: The science and practice of dental surgery
Year: 1914 (1910s)
Authors: Bennett, Norman Godfrey, Sir, b. 1870 Henderson, P. B
Subjects: Dentistry Surgery, Oral
Publisher: New York : W. Wood
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive
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Text Appearing Before Image:
Fig. liU. are likely to occur amongst these natural unitsof the arch. Fig. 614 shows the lack of opposition amongstback teeth which may be caused by the rising and sulking of plate dentures. Here are artificial teeth on plates. The space be-tween the molars caused by smking of platesdoes not exist between 5 | and 5 | , becausethe latter tooth was added later as a repair, andwas placed at a higher level than 6 | and 7 | soas to be in articulation with the upper. Ofcourse 6 | and 7 | should have been raisedat the same time. rig. 615 shows virtual or relative elongation of I 3 and | 6, owing to the rising of an upperplate carrying artificial incisors and premolars.Here the closing of the bite has allowed anabnormally long sliding contact to developbetween | 3 and | 3, resulting in great wear of the disto-labial aspect of | 3, and in medio-palatal wear and loosening of | 3, though theselatter points cannot be verified from the figure.
Text Appearing After Image:
Fig. 615. Such cases show the results of a method ofartificial replacement that allows of actual orrelative lengthening of the remaining naturalteeth, and the consequent development of in-creased lateral stresses ui^on them. To over-come these is one of the objects of bridge-work,which transmits the stress of mastication to theroots of natural teeth on which it is mounted,instead of to the surface of the slowly atrophymgalveolar ridge. STRESSES OF MASTICATION INTO BRIDGE-WORK RELATION It is not intended here to discuss the wholeof the advantages or disadvantages of bridge-work, but only to examine them in relationto the stresses of mastication and their effects. It is evident that so long as a bridge lasts, itcan more efficiently perform its proportionalshare of the work of the arch than can substi-tutes on a plate. Its level, as compared withthe natural teeth, will not change, and so theseare not exposed to the increased stresses, withconsequent wear, displacement, and loosening,whic
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Tagged: , bookid:sciencepracticeo00benn , bookyear:1914 , bookdecade:1910 , bookcentury:1900 , bookauthor:Bennett__Norman_Godfrey__Sir__b__1870 , bookauthor:Henderson__P__B , booksubject:Dentistry , booksubject:Surgery__Oral , bookpublisher:New_York___W__Wood , bookcontributor:University_of_California_Libraries , booksponsor:Internet_Archive , bookleafnumber:557 , bookcollection:cdl , bookcollection:americana