Six-month and one-year clinical evaluation of a composite resin for Class II restorations

A new machine was developed to study the wear of dental filling materials in vitro. Four products: amalgam, Adaptic, Clearfil and acrylic resin were tested. Wear was measured quantitatively by weighing the specimen, and the wear pattern was studied qualitatively with a scanning electron microscope (SEM). A comparison was made with materials that were placed in the mouth for a prolonged period. It was found that the in vitro wear pattern was comparable to that found in vivo.

Section: Discussionsupporting

confidence: 86%

Wear of composite resin in vitro: a testing machine with rubber plate. Preliminary results

Hengchang

Vingerling

Liu

et al. 1990

“…Ryge's method is easy to use and has been employed in many studies including those of Phillips et al (1971Phillips et al ( , 1973, Mj0r & Haugen (1976), Bozell & Charbeneau (1979), Leinfelder ef fl/. (1975), Moffa & Jenkins (1978), Eames et al (1974, Nuckles & Fingar (1975), Bryant, Rees & Ross (1979), Hansen etal. (1984) and Hamilton et al (1983).…”

Section: Descriptive Clinical Criteriamentioning

confidence: 99%

Methods of clinical evaluation of dental restorative materials

Knibbs

1997

The following review of the literature considers various clinical methods for evaluating dental materials. The first section looks at studies that have considered the general handling properties of dental materials in clinical practice (the pragmatic trial). The second section considers studies that have used retrospective evaluation to arrive at conclusions about the longevity of various dental materials (the observational trial). The third section considers the various methods of assessing the quality of restorations in clinical trials (the explanatory trial).

“…However, their major failing relates to these important mechanical properties. Certainly with the vast majority of composites used clinically in anterior teeth, the abrasion resistance is not good enough to prevent loss of anatomical form when used in cavities in posterior teeth (Phillips, Avery & Mehra, 1973;Nuckles & Fingar, 1975;Kusy & Leinfelder, 1977). They generally show little evidence of wear during the first year, but significantly, abrasion is seen during the second year and progressive loss of substance over the whole of the exposed surface is seen thereafter.…”

Section: Introductionmentioning

confidence: 99%

Laser techniques for the evaluation of wear in Class II restorations

Williams

Cunningham

Lalor

et al. 1983

A technique for the quantitative determination of the changes in surface topography of restorations during wear has been developed. This involves the optical contouring of the surface using a laser, and the generation of contour maps. Several different methods for interpreting these maps are discussed. A computer-aided method is the most consistently accurate and measures wear volume to an accuracy of 2--5%.