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Displaying 26 - 38 of 38

Evaluation of Dental Composite Shrinkage and Leakage using X-Ray Microcomputed Tomography

August 24, 2009

Author(s)

Diana N. Zeiger, Jirun Sun, Gary E. Schumacher, Sheng Lin-Gibson

Polymerization shrinkage of dental composites results in leakage and may lead to secondary caries and restoration failure. This study tested the hypothesis that shrinkage and sites of potential leakage in human teeth evaluated using X-ray microcomputed

Nondestructive quantification of leakage and its correlation with material performance parameters

July 30, 2009

Author(s)

Jirun Sun, Rui Fang, Nancy Lin, Naomi Eidelman, Sheng Lin-Gibson

Current methods to determine debonding/leakage at the tooth-composite interphase are qualitative or semi-quantitative. Our previous work introduced a 3D imaging technique to determine and visualize leakage and its distribution at the interface of cavity

Myocardial Calcification in Captive Grouper Epinephelus Aeneus

June 1, 2009

Author(s)

Naomi Eidelman, A Colorni, Jirun Sun, M.C. Fishbein, A Diamant

A case of myocardial calcification is described in the Mediterranean white grouper, Epinephelus aeneus, cultured as broodstock in Eilat (Israel, Red Sea). Large calcified nodules and scar tissue were observed in the ventricular tissues. The chemical

Monitoring of elongation and orientation of osteoblast cells directed by anisotropic nanopatterns

March 22, 2009

Author(s)

Jirun Sun, Yifu Ding, Nancy Lin, Marcus T. Cicerone, Christopher Soles, Sheng Lin-Gibson

The time dependence of cell alignment and morphology (i.e., elongation) on anisotropic nanoscale gratings is characterized. The behavior of pre-osteoblasts cultured on nanoscale gradient patterns of transparent photopolymerized dimethacrylates was

Nondestructive 3D Evaluation of Microleakage Induced by Polymerization Shrinkage of Dental Composites

January 5, 2009

Author(s)

Jirun Sun, Naomi Eidelman, Sheng Lin-Gibson

Microleakage induced by polymerization shrinkage in methacrylate based dental composites continues to be a major concern for dental restoratives. Current methods for characterizing microleakage lack quantification and fail to provide a comprehensive

Monitoring Alignment of Osteoblast Cells Directed by Gradient Nanopatterns

April 6, 2008

Author(s)

Jirun Sun, Yifu Ding, Nancy J. Lin, Hyun Wook Ro, Christopher L. Soles, Sheng Lin-Gibson

We investigated the behavior of pre-osteoblasts cultured on polystyrene and photopolymerized ethoxylated bisphenol-A dimethacrylate gradient patterns. Gradient patterns varying in height from several hundred to 0 nm were prepared using nanoimprinting

Mapping Cell Distribution in Amorphous Scaffolds using Confocal Microscopy

August 19, 2007

Author(s)

Jirun Sun, Nancy Lin, Marcus T. Cicerone, Sheng Lin-Gibson

One common method for probing cell-material interactions is direct visualization via confocal laser scanning microscopy, a technique widely used for studying biological systems. However, confocal microscopy has limited depth penetration for imaging cells

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