Sumita B. Mitra

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The objective of this study was to determine the adhesion to dentin and the physical properties of Vitrabond Light Cure Glass Ionomer Liner/Base and to compare these values with those of a conventional material, 3M Glass Ionomer Liner (3MGI). Shear bond strengths to bovine dentin after 24 h in distilled water were determined to be 12 +/- 3 MPa for Vitrabond(More)
BACKGROUND This article reports the authors' development of nanofillers and a resulting nanocomposite. They measured the nanocomposite's properties in vitro in comparison with those of several existing composites (hybrids, microhybrids and microfill). METHODS The authors developed two types of nanofillers: nanomeric particles and nanoclusters. They used(More)
OBJECTIVES The contribution of chemical bonding of the polycarboxylic acid in classical powder/liquid conventional glass ionomers (GI) and resin-modified glass-ionomers (RMGI) has been attributed to the excellent long-term bond strengths and clinical retention. RMGIs have been recently introduced as paste/liquid systems for convenience of clinical usage.(More)
UNLABELLED BACKGROUND; Recent technological advances have resulted in the marketing of high-powered, or HP, battery-operated light-emitting diode, or LED, dental curing lights. The authors examine the curing efficiency and peak polymerization temperature, or Tp, of a new HP LED curing light. METHODS The authors studied four visible light-curing, or VLC,(More)
This paper reports the results of an in vitro study of fluoride release from Vitrabond Light-Cure Glass Ionomer Liner/Base. The material released fluoride ions into the surrounding medium for up to 740 days. The rate of release of fluoride ions was independent of the cure time in the range studied. Combining a conventional polyalkenoic acid solution with(More)
Cavity liners have traditionally been used in direct and indirect restorations for purposes such as promoting reparative dentin and neutralizing acids. Today, liners are used when resin composites are used as the restorative materials on the posterior teeth, but for a different reason. Clinically, liners are considered to decrease sensitivity and wet the(More)
The specific binding of 125I-human choriogonadotropin (hCG) to plasma membranes, nuclear membranes, lysosomes, rough endoplasmic reticulum, heavy golgi, and medium and light golgi of bovine corpora lutea was dependent on the amount of protein, 125I-hCG concentration and incubation time. The bound hormone in all the organelles was able to rebind to fresh(More)
Highly purified nuclei isolated from bovine corpora lutea showed marked enrichment of NAD pyrophosphorylase, a marker for this organelle. Rough endoplasmic reticulum and lysosomal markers were undetectable, whereas plasma membrane and Golgi markers were detectable but not enriched in nuclei. These highly puridied nuclei exhibited specific binding with(More)
The nuclei (N), plasma membranes (PM), mitochondria-lysosomes, rough endoplasmic reticulum, and combined (light, medium, and heavy) Golgi (G) fractions were isolated from human ovaries. The purities of these fractions were evaluated by assays of appropriate marker enzymes, which revealed that some fractions were very pure but that others had minor(More)
OBJECTIVE Several methacrylate/glass ionomer hybrid materials are now available for clinical use as restorative filling materials. However, the long-term resistance of these materials to physical degradation in the humid oral condition is not known. The objective of this investigation was to determine the mechanical properties, e.g., ultimate compressive(More)