Results 211 to 220 of about 10,343 (253)

Dentin permeability to bacterial proteins in vitro

Journal of Endodontics, 1994
Passage of bacterial components through dentin is a subject of recent research with in vitro as well as with in vivo models. Diffusive transport of Porphyromonas gingivalis ATCC 33277 proteins has been demonstrated by the authors with an in vitro setup closely simulating the pulp chamber. The purpose of this investigation was to study the filtration of
E, Pissiotis, L S, Spångberg
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Dentin permeability: Effects of smear layer removal

The Journal of Prosthetic Dentistry, 1981
The results of this study permit the following conclusions: 1. The use of dilute (6%) citric acid for very short time intervals permits sequential removal of the smear layer on human dentin. 2. Acid-etching for as little as 5 seconds removes much of the smear layer and exposes the orifices of dentinal tubules. 3.
D H, Pashley, V, Michelich, T, Kehl
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Effect of dentin conditioning on dentin permeability and micro‐shear bond strength

European Journal of Oral Sciences, 2007
The purpose of this study was to compare fluid flow rates across dentin surfaces treated with four conditioners. The effect of conditioning on the micro‐shear bond strengths of glass ionomer cement (Fuji IX GP) and resin‐based adhesives (Single Bond 2 or Clearfil SE Bond) were also investigated.
Messer, HH, Burrow, MF, Palamara, JEA, Banomyong, D   +3 more
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Effects of two disinfection/sterilization methods for dentin specimens on dentin permeability

Clinical Oral Investigations, 2018
To investigate the effects of two disinfection/sterilization methods on the permeability of dentin specimens.Forty intact human third molars were freshly extracted and cut, close to the pulp chamber, into dentin disks with a 500-μm thickness. The disks were randomized (n = 20 each) into a 70% ethanol group (acid-etched dentin disks soaked in 70 ...
Ruodan, Jiang, Yongxiang, Xu, Hong, Lin
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Dentin permeability: sealing the dentin in crown preparations.

Operative dentistry, 1992
Provisional restorations of full crown preparations may permit more microleakage of bacteria and their products than the final castings do. However, most investigations of the sealing qualities of cemented castings have reported that they too permit dye leakage.
E L, Pashley, R W, Comer, M D, Simpson, J A, Horner, D H, Pashley, W F, Caughman   +5 more
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Dentin permeability and dentin sensitivity.

Proceedings of the Finnish Dental Society. Suomen Hammaslaakariseuran toimituksia, 1992
The hydrodynamic theory of dentin sensitivity is based on the premise that sensitive dentin is permeable throughout the length of the tubules. Such a condition may permit the diffusion of bacterial products across dentin to the pulp where they may cause irritation of pulpal soft tissues.
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Effect of dentin desensitizers and dentin bonding agents on dentin permeability.

American journal of dentistry, 2002
To determine the effect of dentin desensitizing agents (oxalates and glutaraldehyde) and dentin bonding agents, with and without resin-based composite (RBC) on dentin permeability and morphology of the dentin surface. The influence of saliva and toothbrushing on these agents was also evaluated.Radicular dentin discs +/-1 mm thick were obtained from ...
P, Jain, J W, Reinhardt, K V, Krell
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Dentin Permeability: Effects of Temperature on Hydraulic Conductance

Journal of Dental Research, 1983
The rates of fluid movement across dentin discs, in vitro, were measured at 10, 20, 30, 40, and 50°C in unetched and acid-etched dentin. Increasing the temperature 40° (i.e., from 10 to 50°C) resulted in a 1.8-fold increase in fluid flow in unetched dentin, which was of a magnitude similar to the decrease in viscosity that occurred over the same ...
D H, Pashley, S M, Thompson, F P, Stewart   +2 more
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[The influence of dentin conditioning on permeability of dentin].

Deutsche Stomatologie (Berlin, Germany : 1990), 1992
In this study the influence of four different pretreatments showed significant differences on the permeability of cut dentin. On the average the application of 25% polyacrylic acid increased the permeability by approximately 10 percent, the application of 34% polyacrylic acid by 30 percent.
H G, Schaller, P, Stumbaum, W, Gotze
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Dentine permeability and its role in the pathobiology of dentine sensitivity

Archives of Oral Biology, 1994
The classical hydrodynamic theory implicated fluid movement as a transducing mechanism in the production of dental sensitivity. This theory assumes that sensitive dentine must be permeable. Various measurements of dentine permeability are discussed, including: (1) factors that influence diffusive permeation across dentine; (2) factors that influence ...
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