BACKGROUND The purpose of this study was to compare the push-out bond strength of mineral trioxide aggregate (MTA) and calcium enriched mixture (CEM) as root end filling materials. MATERIALS AND METHODS A total of 40 root dentin slices (1 ± 0.2 mm) were prepared from freshly extracted human maxillary central teeth and their lumens were enlarged to 1.3 mm. The slices were randomly divided into...

OBJECTIVES The purpose of the study was to evaluate human dental pulp response to pulpotomy with calcium hydroxide (CH), mineral trioxide aggregate (MTA), and calcium enriched mixture (CEM) cement. MATERIALS AND METHODS A total of nine erupted third molars were randomly assigned to each pulpotomy group. The same clinician performed full pulpotomies and coronal restorations. The patients were ...

Chinese cities are experiencing major environmental e!ects from fossil fuel-based energy consumption for mainly residential and, increasingly, urban transportation uses. Community energy management (CEM) is a sustainable energy strategy which looks at how purposely shaping the built environment and designing urban services in consideration of energy production, distribution and use could a!ect ...

INTRODUCTION Some studies in dental literature have proposed that short term and long term exposure of root dentin to calcium hydroxide predisposes it to fracture. Mineral trioxide aggregate (MTA) and a recently introduced endodontic material, calcium-enriched mixture (CEM) cement may be used instead of calcium hydroxide and might have an effect on the strength of root dentin. Therefore, the ai...

DNA topoisomerase (topo) IIalpha gene expression or activity is altered in tumor cells selected for resistance to inhibitors of topoII. To better understand the mechanisms by which topoIIalpha expression levels are modulated, we examined topoIIalpha transcriptional regulation in ICRF-187-sensitive and ICRF-187-resistant human leukemic cell lines that express an increased amount of topoIIalpha p...

INTRODUCTION The aim of this study was to compare the marginal adaptation of mineral trioxide aggregate (MTA) and calcium-enriched mixture(CEM) cement apical plugs in open apex teeth in dry, blood- and saliva-contaminated canals. METHODS AND MATERIALS A total of 120 human extracted single-rooted teeth were used. The teeth were decoronated and canals were cleaned and shaped up to #80 K-Files. ...

The Austrian Climate and Energy (CEM) model regions are facing energy transition towards a greater share of renewable energy sources in the final electricity mix. To guarantee the resilience of the CEM socio-economic and regional systems, an integrated approach towards electricity generation and transmission is necessary. The changing architecture of electricity generation is causing new challe...

Human lymphoblastic leukemia cells of line CEM-C7 are glucocroticoid-sensitive and contain glucocorticoid receptors of wild-type characteristics. EL4 mouse lymphoma cells are resistant to lysis by glucocorticoids due to mutant receptors that exhibit abnormal DNA binding. Hybrids between the two cell lines were prepared and analyzed with respect to glucocorticoid responsiveness and to receptor t...

The Austrian Climate and Energy (CEM) model regions are facing energy transition towards a greater share of renewable energy sources in the final electricity mix. To guarantee the resilience of the CEM socio-economic and regional systems, an integrated approach towards electricity generation and transmission is necessary. The changing architecture of electricity generation is causing new challe...