Show simple item record

dc.contributor.authorGolshan, Khosrowen_US
dc.date.accessioned2020-11-05T16:27:44Z
dc.date.available2020-11-05T16:27:44Z
dc.date.issued1979
dc.date.submitted1979
dc.identifier.other8941466
dc.identifier.otherb14399441
dc.identifier.urihttps://hdl.handle.net/2144/41601
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.descriptionPhotographs, some colored and line drawings 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 149-154.en_US
dc.description.abstractDensity fractionation of enamel has been studied for many years. It has been determined that the density of enamel varies in different locations and layers. Different densities or variations in the distribution of organic or mineral matters in enamel indicates pervious routes through the enamel. Hypothetically, low density fractions that contain more organic material belong to prism sheaths. One of the difficulties in this procedure is pulverizing the small samples from a single tooth in sufficiently small particles to permit isolation of relatively pure structural entities. The subject of the present work is the investigation of this problem. A special device was designed to permit pulverization of enamel. With this method, prevention of time consumptions, heat generation, and loss of material were considered. Tooth enamel was pulverized by means of different burs. Three diamond and two carbide burs were utilized. Results showed that the size of enamel particles treated by means of diamond burs was smaller than that of those treated with carbide burs. A super finish diamond bur (769-13F) created the smallest particles. About 93% of the particles treated by means of this bur were less than the width of the prisms in the surface enamel (5-6 microns) For reduction of particle size, a special ball mill made of zirconium was utilized and the effect of this device was investigated. Very fine pulverized enamel was obtained and the particle size was reduced to less than 3 microns.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.subjectFractionationen_US
dc.titlePreparation of pulverized human tooth enamel for dentistry fractionationen_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


This item appears in the following Collection(s)

Show simple item record