摘要:

Laboratory fabricated veneering of discolored or malformed anterior teeth is becoming a widely used technique. Etched Dicor and Dicor Plus ceramic veneers cemented with Dicor Light Activated Cement with Fluoride is one technique available to the practitioner. The purpose of this study was to evaluate the clinical effectiveness of castable ceramic veneers and the cementation system. Forty‐three Dicor and 18 Dicor Plus veneers were placed in 12 patients. An intraenamel preparation was completed with a bullet‐nosed diamond bur in an ultra‐speed handpiece with air‐water spray, and a polyvinylsiloxane impression was made. All veneers were fabricated on dies by the same laboratory technician and placed by one practitioner. The restorations were examined by two evaluators at baseline, 3 months, and 1 year, using modified Ryge c

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00713.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Severe tooth wear is common in older dentate individuals, with one treatment option being composite resin restorations reinforced with a suitable matrix. This study evaluated the use of high modulus polyethylene (Celanese) fibers as a reinforcing matrix for composite resin. Human mandibular incisor teeth were sectioned to simulate severe tooth wear. Sectioned surfaces were measured, the teeth paired and assigned to control or test sample groups, and further assigned to be tested with a labial or lingual shearing force. A phosphorylated dentin bonding adhesive was applied to the abraded dentin surface. Labial and lingual intra‐enamel bevel preparations were cut on each specimen. A piece of Celanese fabric was bonded onto the acid‐etched labial and lingual bevels of the test specimens using an enamel bonding agent. Class IV composite resin restorations were then placed onto the test and control specimens. Following water storage, the specimens were subjected to shearing forces. Bond strengths for test specimens were significantly greater (p<0.03) than the controls. Specimens with a labially applied force also had significantly higher bond strengths (p<0.001). SEM analysis revealed adhesive bond failures over dentin surfaces, with cohesive bond failures within the composite resin. Celanese fibers maintained the restorations on the teeth, although adhesive failures were seen between the fibers and enamel bonding ag

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00650.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

This study was to determine the shear bond strengths of Ni‐Cr alloy to Ni‐Cr alloy (Group I), Ni‐Cr alloy to enamel (Group II), and Ni‐Cr alloy to dentin (Group III) using Imperva Dual, DC Metabond, All‐Bond, Geristore, and Panavla. All bonded specimens were thermocycled 2000 X (5CC‐55°C) after 24 hours and subjected to shear bond testing on a Universal Instron Testing Machine. In all groups of the study, Imperva Dual and CB Metabond had significantly (p<.05) higher bond values

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00714.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Determining the best technique for finishing and polishing composite resins is important to ensure longevity of the restoration and prevention of recurrent decay and periodontal disease. This study quantitatively compared the surface roughness of a small particle hybrid composite material finished and polished using six different techniques. Five composite samples were randomly assigned to one of six polishing techniques. Uniform composite surfaces were prepared by finishing samples with a 600‐grit carborundum disk prior to polishing. The unpolished surfaces were analyzed with the Taylor‐Hobson Talysurf 10 surface texture measuring instrument. The surfaces were then polished and analyzed again. There were no statistical differences among treatment groups prior to polishing. There was a statistical difference between treatment groups after polishing. The smoothest surfaces were obtained using Centrix System rubber points alone, Centrix System rubber points plus Caulk's Prisma Gloss fine and super‐fine pastes, and Caulk's Enhance disks plus Caulk's Prisma Gloss fine and super‐fine pastes. There was no statistical difference between these methods and 3M Sof‐flex disks alone. The roughest surface was produced by the Enhance disks only without using the Prisma Gloss pastes. There was no statistical difference between this method, however, and the use of Sof‐flex disks plus Kerr's Lustre Paste. Lustre Paste, included with Herculite kits, did not improve a surface polished with Sof

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00715.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

The efficacy of newly developed adhesive restorative materials is commonly described byin vitrotest results such as bond strength and microleakage data. Due to the inconsistency often found betweenin vitrotesting andin vivoperformance, the purpose of the present investigation was to restore teeth scheduled for extractionin vivowith an experimental restorative bonding system and to evaluate the microleakage of the restorations by common laboratory techniques following extraction after 3 months of clinical service. Two restorations were placed in each of seven anterior teeth, one in the middle of the labial enamel portion and the other labially extending over the cementoenamel junction (CEJ). Six of the seven fillings completely surrounded by enamel showed no microleakage. However, two of the restorations crossing the CEJ revealed microleakage originating from the cervical margins. In spite of the small number of fillings assessed, the experimental enamel‐dentin adhesive compound tested is preliminarily considered a promising new syste

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00716.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00652.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00653.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Arch bars are well‐known dental appliances for the management of fractures and orthognathic surgery. Traditionally both the commercially available, prefabricated arch bars as well as the custom‐made arch bars are made of metal so as to provide good rigidity. Each of these types of arch bars has its own advantages as well as drawbacks. This article looks at a type of custom‐made arch bar that is easy to construct and use. At the same time, it provides good rigidity, fit, and esth

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00717.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00654.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

In a companion article in this issue and a previous article in this journal, two experimental enamel dentin adhesive systems were evaluated and compared with four commercially available resin bonding agents by SEM investigation of the tooth adhesive interfaces and by determination of bond strengths to enamel and dentin under various conditions. In continuation of these screening investigations, the present article describes the results of cavity tests for assessment of marginal adaptation by measurement of gap dimensions, and of cavity sealing by rating of microleakage, when standardized dentin cavities were treated with the adhesive restorative systems. Both tests resulted in the same ranking of the six materials. Gluma, Clearfil Photo Bond, and two experimental compounds showed very narrow gaps and moderate microleakage. In contrast, Prisma Universal Bond 2 (the material has been replaced in the market by Prisma Universal Bond 3) and Scotchbond 2 showed significantly wider marginal gaps and more pronounced microleakage. Final discrimination between the efficacy of adhesive restorative materials by any of the currently usedin vitrotests is disputable and prediction of long‐term clinical performance by laboratory test data remains questionabl

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00718.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY