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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

An Evaluation of the Bond Strength and Failure Site of Composite Resin and Glass Ionomer in Identical Orthodontic Direct Bonding Systems

Fryar, Brian C. January 1989 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Glass ionomers offer several advantages for orthodontic cementation of brackets including no etching of enamel, fluoride release, and ease of debonding. This study compared in vitro bond strengths of glass ionomers with a composite resin. Two luting glass ionomers, (Ketaccem and Fuji I), two restorative ionomers, (Ketac-fil and Fuji II), and an orthobonding resin, (System 1 +), were used. Extracted human maxillary premolars were selected for a sample of 22 per cement. The teeth were pumiced prior to bonding. Ormco minimesh bicuspid brackets were bonded following manufacturer's directions. Only the teeth bonded with resin cement were etched. After bonding the teeth were stored in water at 37 C for 7 days and thermocycled 2500 times through a 40° c differential. Tensile bond strengths were measured at a crosshead speed of 0.5mm/min. Debonded specimens were examined to record failure modes. System 1+ had a bond strength of 103 +/- 21 kg/cm2 with 80% cohesive failure in the cement. Ketac-fil, Ketaccem and Fuji II were not significantly different and had strengths of 32.6 +/- 6.4, 31.9 +/- 7.1 and 33.7 +/- 8.5 respectively. Failure was 93% cohesive in the cements. Fuji I had a strength of 26. 6 +/- 4. 7 with 89% cohesive failure and was significantly weaker than the others. Although the strengths of the glass ionomers studied were substantially lower than the resin, they failed consistently in cohesive fracture through the cement with relatively small deviations. Since the minimum bond strength required for clinical success is not known, only a controlled clinical study can determine the ultimate effectiveness of glass ionomers as orthodontic bonding adhesives.
22

The effect of the gold oxidation process in the porcelain fused to gold bond a dissertation submitted in partial fulfillment ... crown and bridge prosthetics ... /

Custer, Frederic. January 1961 (has links)
Thesis (M.S.)--University of Michigan, 1961.
23

Oxidation and bonding of alloys used for ceramic-metal restorations a thesis submitted in partial fulfillment ... dental materials ... /

Seluk, Laurence Wm. January 1977 (has links)
Thesis (M.S.)--University of Michigan, 1977.
24

Factors affecting bond strength of no-mix orthodontic adhesive systems a thesis submitted in partial fulfillment ... in orthodontics ... /

Evans, Lawrence B. January 1984 (has links)
Thesis (M.S.)--University of Michigan, 1984.
25

Vibrational spectroscopic investigations of calcium phosphates and dental materials

Xu, Jingwei, January 1996 (has links)
Thesis (Ph. D.)--McGill University, 1997. / Includes abstract in French. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
26

The effect of the gold oxidation process in the porcelain fused to gold bond a dissertation submitted in partial fulfillment ... crown and bridge prosthetics ... /

Custer, Frederic. January 1961 (has links)
Thesis (M.S.)--University of Michigan, 1961.
27

Factors affecting bond strength of no-mix orthodontic adhesive systems a thesis submitted in partial fulfillment ... in orthodontics ... /

Evans, Lawrence B. January 1984 (has links)
Thesis (M.S.)--University of Michigan, 1984.
28

Oxidation and bonding of alloys used for ceramic-metal restorations a thesis submitted in partial fulfillment ... dental materials ... /

Seluk, Laurence Wm. January 1977 (has links)
Thesis (M.S.)--University of Michigan, 1977.
29

Vibrational spectroscopic investigations of calcium phosphates and dental materials

Xu, Jingwei, January 1996 (has links)
Thesis (Ph. D.)--McGill University, 1997. / Includes abstract in French. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
30

Coronal microleakage of a dentin bonding agent when used in the presence of a eugenol containing endodontic sealer

Minchau, Jeffrey G. January 2004 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains x, 91 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 66-71).

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