ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00683.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Custom‐fitted protective mouthguards for children and adults during sports activities can prevent or minimize traumatic dental injuries. This article reviews a method for fabrication of custom mouthguards and discusses their us

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00684.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Composite resin materials and methods for their use have improved to the extent that long lasting Class I carious lesions on stress‐bearing surfaces can be restored with predictable results. This article demonstrates a step‐by‐step clinical technique for placement of a Class I composite resin restoration lined with a light‐hardened glass‐ionomer dentin replacement foundation. Emphasis is placed on tooth isolation, thoughtful handling of the respective materials, and the importance of final sealing of the resin/ename

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00685.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

The elimination of the labiogingival metal collar of a porcelain‐fused‐to‐metal (PFM) restoration is an attempt to achieve an improved esthetic result. In their expectation of a more cosmetic tooth restoration, patients may influence dentists to use the all‐porcelain labial margin to avoid metal showing in the final restoration. Success of this type of restoration depends upon proper tooth preparation. The all‐porcelain margin requires a 1.2‐mm wide labiogingival shoulder of approximately 70 or 90 degrees wrapping into the interproximal area. Much of the effectiveness of the restoration depends upon the design of the metal substructure. The following change is made in the design of this substructure for this modified PFM crown: the labiogingival portion of the metal is finished back to the gingival‐pulpal line angle with the metal against the axial wall being from 0.3 mm to 0.5 mm thick. This allows for 0.2 to 0.3 mm of opaque and 0.7 to 1.0 mm of shoulder porcelain. The direct liftoff technique is a useful method of achieving clinically acceptable all‐porcelain margins. Such restorations may give ex

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00686.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Amicroleakage and scanning electron microscope (SEM) study was conducted in order to investigate the effects of acidic primers on prepared dentin surfaces. The microleakage study revealed that no significant differences were noted between the five materials tested in regard to leakage at enamel and dentin margins. SEM analyses revealed that the smear layers of all specimens were altered in some manner. Further long‐term clinical studies should be conducted to evaluate acidic treatment of denti

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00687.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Recent improvements in formulation have led to significant improvements in the bond strength and clinical performance of dentin bonding agents. The growing interest in the concept of total etch prompted a comparison between manufacturer‐recommended procedure and that of total etch for the product Syntac. Anin vitrostudy to examine shear bond strength to dentin and microleakage and anin vivocomponent to investigate the micromorphologic relationship between restoration and tissue was conducted. No statistical significance was observed in bond strength values for the nonetched versus the etched group. Significantly, however, a larger number of specimens in the nonetched group exhibited microleakage.In vivo, only the etched group exhibited a zone of hybridization although both nonetched and etched restorations showed no interfacial gaps. It was concluded that total etch does not compromise the shear bond strength of Syntac but it appears to significantly reduce microleakage possibly due to the formation of a hybrid zone and may have merit clinicall

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00688.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

Thisin vitrostudy evaluated the effects of two dentin adhesive systems on dentin permeability. The XR‐Bonding System modifies the smear layer but does not open dentinal tubules. The Kanca or “total‐etch” technique (phosphoric acid, Tenure A and B, Scotchbond 2 Adhesive) removes the smear layer and opens dentinal tubules. Despite these differences, both systems reduced dentin permeability in a similar manner. XR‐Bond decreased permeability to 52% of the smear layer value, while total etching reduced permeability to 66% of t

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00689.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

This study dealt with the clinical evaluation of 121 inlays and onlays generated from both Dicor ceramics and Vita porcelains. These two different types of ceramic materials were cemented using three different duo‐cured composite resin luting agents, which differed in particle size. At the end of 3 years, no difference could be detected between the clinical performance of the Dicor and Vita restorations. Both exhibited the same degree of color matching characteristics, marginal integrity, and general clinical performance; however, seven of the restorations exhibited fracture through the isthmus, which was shown to be due to insufficient cavity depth. The balance of the restorations exhibited excellent clinical performance when evaluated against the United States Public Health Service Syste

ISSN:1496-4155    

DOI:10.1111/j.1708-8240.1992.tb00690.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.tb00691.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY