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dc.contributor.authorHashemi, Fahimeh Hakimen_US
dc.date.accessioned2020-11-05T16:27:58Z
dc.date.available2020-11-05T16:27:58Z
dc.date.issued1979
dc.date.submitted1979
dc.identifier.other8941615
dc.identifier.otherb14399465
dc.identifier.urihttps://hdl.handle.net/2144/41603
dc.descriptionPLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.en_US
dc.descriptionBlack and white photographs included.en_US
dc.descriptionThesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1979 (Operative Dentistry)en_US
dc.descriptionBibliography: leaves 52-56.en_US
dc.description.abstractAcid etching of teeth allows for attachment of resins to enamel for preventive dentistry, repair of fractured anterior teeth, direct bonding of orthodontic brackets and many other useful procedures in both adults and children. However, it has been shown that primary tooth enamel has a pronounced prismless layer compared to enamel of permanent teeth. The enamel of primary teeth is more acid resistant and tends to interfere with the development of well developed prism-end-patterns needed for resin attachment. Gwinnett (1973) found that mechanical disking could be used to remove the prismless enamel layer and enhance the development of etching patterns. The purpose of this investigation was to determine whether the acid etch procedure can be made more effective on primary tooth enamel through the use of simple mechanical pretreatment. For that purpose, forty teeth were divided into four groups. Teeth in Group I were etched for two minutes with 37% phosphoric acid and then prepared for scanning electron microscopy. The same procedure was followed for Group II. After sealing, the enamel was totally dissolved and the negative replica viewed in a SEMicograph. The prismless layer of the teeth in Group III were removed by (1) paper disk, (2) green stone (3) initial two minutes etching followed by the use of a green stone and pumice. The teeth were then etched again by applying 37% phosphoric acid for one minute. In Group IV, the same procedure as in Group III was applied, followed by the negative image technique・ The results indicated that the method of Group III, sub division C, demonstrated the best result. The specimens established a good surface uniformity and the length of tags was uniform as demonstrated by Group IV, sub division C. Control specimens in Group I did not show these features. They lacked uniformity and a clearly definable etching pattern.en_US
dc.language.isoen_US
dc.publisherBoston Universityen_US
dc.rightsThis work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.en_US
dc.subjectDental enamelen_US
dc.subjectMicroscopy, electron, scanningen_US
dc.titleA modified technique for removal of prismless enamel in primary teeth : a scanning electron microscopy studyen_US
dc.typeThesis/Dissertationen_US
etd.degree.nameMaster of Science in Dentistryen_US
etd.degree.levelmastersen_US
etd.degree.disciplineOperative Dentistryen_US
etd.degree.grantorBoston Universityen_US


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