Surface Roughness of Composite Resins Before and After Finishing

Glantz, Per‐Olof; Larsson, Lars-Ake

doi:10.3109/00016357209004601

Cited by 28 publications

(12 citation statements)

References 5 publications

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“…In the literature the surface energy is supposed to be closely related to adhesion forces expected on the surface, although no attempt has been made (to our knowledge) to correlate surface energy and adhesion properly. Some fairly comprehensive investigations have been concerned with surface energy determination (8)(9)(10)(11)(12)(13). GLANTZ (8) showed that under clinical conditions there was a m.aximum weight of dental plaque capable of adhering per unit of area of a solid.…”

Section: Discussionmentioning

confidence: 99%

An experimental study of the adhesion of bacterial layers to some restorative dental materials

Tullberg

1986

European J Oral Sciences

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— In the present study a powerful method for measuring adhesion is introduced. It is, based on the observation that the bacterial layer is usually capable of maintaining an interior pressure, but fractures when this pressure exceeds a certain critical value characteristic of the mechanical and adhesive properties of each specific bacteria and its formed matrix. A water jet: from a nozzle was directed on the bacterial layer of the specimen. A specimen covered with a layer of Streptococcus mutans, grown in an artificial mouth, was placed on a sledge and displaced twice, at constant speed in front of the jet, thus forming two grooves in the plaque layer. When the grooves are made in parallel utilizing different water pressures, the critical pressure for causing disengagement of the plaque, pc, can be evaluated. It is claimed that pc gives an estimate of the plaque adhesion. Polished and ground surfaces of four materials were investigated, namely amalgam, PMMA, gold and porcelain‐coated gold.

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Section: Discussionmentioning

confidence: 99%

An experimental study of the adhesion of bacterial layers to some restorative dental materials

Tullberg

1986

European J Oral Sciences

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“…Scanning electron microscopy has been employed by a large number of investigators including Chandler et al (1971), Beech & Brown (1972), Hannah & Smith (1973), Gray & Gavin (1975), Kanter, Koski & Graham (1976) and Valcke (1978). Surface roughness has been observed with the aid of profilometers by Glantz & Larsson (1972), Kanter et al (1976), Horton et al (1977), andde Wet (1978). The porosity of dental restorative materials has also been studied by a variety of methods; optical methods have been used, for example, by Beasley, Makinson & Rohr (1976); a pycnometric technique was used by Lautenschlager & Lugassy (1970); while mercury porosimetry was employed by Rootare & Spencer (1972).…”

Section: Introductionmentioning

confidence: 99%

The porosity and roughness of four direct filling resins

Valcke

Duggan

1981

J of Oral Rehabilitation

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Four direct filling resins were examined in order to compare the roughness and porosity of different materials, mixed by different methods. From each material six specimens were prepared. Each specimen was formed against a Mylar sheet and the Mylar-formed surface was examined. Subsequently it was trimmed and polished and re-examined. Each specimen was examined with a microscope using incident light and employing an automatic point-counting attachment in order to assess the percentage surface (apparent) porosity. Each specimen was also examined with a stylus-type profile meter. Rt (total roughness height) was recorded for all specimens and Ra (roughness average) was recorded for all polished specimens. The findings support the conclusion that a capsulated resin without an inorganic filler yields a better surface than other resins.

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“…Filling a cavity with a composite resin material necessitates the use of a celluloid matrix band (Fig. 4) in order to get a smooth surface after setting of the material (Glantz & Larsson, 1972). Although it is sometimes possible to see air bubbles trapped in material as other investigators pointed out (Hannah & Smith, 1973), less overhang and better contour was obtained with a preformed matrix band.…”

Section: Resultsmentioning

confidence: 99%