Results 131 to 140 of about 6,303 (189)
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Journal of Dentistry, 1992
A critical review of techniques used in the assessment of microleakage in dental restorations is presented. These techniques include the use of air pressure, bacteria, radioisotopes, electrochemistry, chemical tracers and dye penetration. Wide variations in methodologies are revealed.
M J, Taylor, E, Lynch
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A critical review of techniques used in the assessment of microleakage in dental restorations is presented. These techniques include the use of air pressure, bacteria, radioisotopes, electrochemistry, chemical tracers and dye penetration. Wide variations in methodologies are revealed.
M J, Taylor, E, Lynch
exaly +3 more sources
Clinical evaluation of a microleakage test
Dental Materials, 1987Abstract Microleakage of amalgam restorations traditionally has been carried out in the laboratory. The present study deals with use of calcium hydroxide as an agent to detect microleakage. This method provides a major difference from previous studies in that the detecting agent leaks from whithin to the outer environment.
K F Leinfelder, K F Leinfelder
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Microleakage of posterior composite restorations
Dental Materials, 1985Abstract Several composite restorative resins have recently been introduced for use in posterior teeth. A number of dentin bonding agents are commercially available for use in conjunction with composite restorative resins. The objective of this in vitro study was to evaluate the microleakage of Class II MOD preparations in extracted human mandibular ...
D H Retief, E L Bradley
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Microleakage and enamel finish
The Journal of Prosthetic Dentistry, 1978Cavity preparations that are finished with hand instruments allow significantly less marginal leakage than those which are completed only with rotary instruments. This does not mean that hand-instruments walls are perfectly smooth; it only means that these walls allow less marginal leakage.
S C, Khera, K C, Chan
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Journal of Endodontics, 2002
Forty-six single rooted extracted human teeth were used in this study. After cleaning and shaping, twenty canals were randomly selected for obturation with MTA placed in an orthograde manor (Group 1). Another twenty roots were obturated with gutta-percha and Kerr EWT sealer, using warm vertical compaction (Group 2). The apical 3 mm of each root in both
Wallis E, Andelin +4 more
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Forty-six single rooted extracted human teeth were used in this study. After cleaning and shaping, twenty canals were randomly selected for obturation with MTA placed in an orthograde manor (Group 1). Another twenty roots were obturated with gutta-percha and Kerr EWT sealer, using warm vertical compaction (Group 2). The apical 3 mm of each root in both
Wallis E, Andelin +4 more
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Microleakage of root restorations
The Journal of the American Dental Association, 1988This study evaluated the microleakage of various restorative materials placed in root surfaces. A minimum of 20 freshly extracted single-rooted teeth were used for each combination of restorative materials. Four preparations were made on the root surface and each restored with a different material.
K K, Wenner +4 more
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Microleakage of retrograde amalgams
Journal of Endodontics, 1985In this two-part in vitro investigation, apical leakage was electrochemically analyzed in teeth with different thicknesses and compositions of dental amalgam. In part 1, the apices of 10 teeth each were filled with zinc-containing amalgam to a depth of 1 mm or 3 mm.
G D, Mattison +3 more
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Journal of Dentistry, 1976
Abstract Microleakage may be defined as the passage of bacteria, fluids, molecules or ions between a cavity wall and the restorative material applied to it. Many techniques have been devised to test the cavity-sealing properties of restorations both in vitro and in vivo .
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Abstract Microleakage may be defined as the passage of bacteria, fluids, molecules or ions between a cavity wall and the restorative material applied to it. Many techniques have been devised to test the cavity-sealing properties of restorations both in vitro and in vivo .
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Microleakage of indirect composite inlays
Dental Materials, 1989The purpose of this in vitro study was to evaluate the microleakage of indirect composite inlays and to compare leakage of inlays with directly placed composite restorations. Standardized MOD preparations were cut in 50 extracted human molars. One gingival margin was placed in enamel above the CEJ, and the other was placed in dentin below the CEJ.
E A, Hasegawa, D B, Boyer, D C, Chan
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A crown for clinically investigating microleakage
The Journal of Prosthetic Dentistry, 1991This investigation evaluated a cast crown with an access port for in vivo microleakage studies. Fifteen complete cast crowns containing an access port in the facial surface were cast. The gingival margins of the crowns were modified to test the sealing ability of the access port. Each casting was thermocycled 750 times at 5 degrees to 60 degrees C over
D A, Felton +3 more
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