Preliminary study on antimicrobial efficiency of some common chemical substances with a disinfecting character on impression materials used in implant-prosthetic rehabilitation

This work focused on the study of decorated pottery dated back to the 16th century from the Roman archaeological site of Villa dei Quintili, a monumental complex located in the south-eastern part of Rome (Italy). A minero-petrographic and geochemical study was undertaken to analyse five archaeological samples in order to define textural features and raw materials used for their production, along with the chemical and physical composition of the superficial decorative glazed coatings. For this purpose, different analytical methods were used, such as polarising optical microscope (POM), X-ray diffraction (XRD), micro-Raman spectroscopy, X-Ray fluorescence (XRF), and electron microprobe analysis coupled with energy dispersive spectrometry (EMPA-EDS). The results of such a multidisciplinary approach allowed us to achieve important results crucial to recognise the shards as majolica of the Renaissance period, improving knowledge about manufacturing processes of these renowned painted ceramic artefacts.

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Does immediate dentin sealing influence the polymerization of impression materials?

European Journal of Dentistry ◽

10.4103/1305-7456.137650 ◽

2014 ◽

Vol 08 (03) ◽

pp. 366-372 ◽

Cited By ~ 6

Author(s):

Paula Cristine Ghiggi ◽

Arno Kieling Steiger ◽

Maurem Leitão Marcondes ◽

Eduardo Gonçalves Mota ◽

Luiz Henrique Burnett ◽

...

Keyword(s):

Digital Camera ◽

Tooth Surface ◽

Control Groups ◽

Impression Material ◽

Oxygen Inhibition ◽

Impression Materials ◽

Group 2 ◽

Materials Used ◽

Experimental Group ◽

Group 1

ABSTRACT Objectives: The objective of the following study is to evaluate the interaction between the resin materials used in immediate dentin sealing (IDS) techniques and impression materials with two different techniques to eliminate the oxygen-inhibition layer. Materials and Methods: The occlusal dentin surface of 35 human molars was exposed. The teeth were used in two Groups: Group 1 – Impression with Express XT; Group 2 – Impression with Impregum. Groups 1 and 2 were divided into 14 subgroups: Groups 1a and 2a – Control groups; 1b and 2b – IDS with Clearfil SE Bond (CSE); 1c and 2c – IDS with CSE + additional polymerization with glycerin jelly; 1d and 2d – IDS with CSE + alcohol; 1e and 2e – IDS with CSE and Protect Liner F (PLF); 1f and 2f – IDS with CSE and PLF + additional polymerization with glycerin jelly; and 1g and 2g – IDS with CSE and PLF + alcohol. Five teeth were used in each experimental group, and the tooth surface was photographed using a digital camera. Results: Small quantity of unpolymerized impression material remained attached to the CSE or to the PLF in Groups 1b and 1e. Groups 1c and 1d prevented the interaction. Small quantity of polymerized impression material remained attached to the CSE or to the PLF for Groups 2b and 2e. The same interaction was observed for Groups 2c and 2d. For Groups 2c and 2f, no interactions were observed. Conclusion: Resin materials interacted with impression materials. The application of glycerin jelly and alcohol prevented the interaction of CSE with Express XT and PLF with Impregum; however, these treatments were not completely effective in preventing the interaction of CSE with Impregum and PLF with Express XT.

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The Measurement of SVOC Emission Rates from Building Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.893.369 ◽

2017 ◽

Vol 893 ◽

pp. 369-374

Author(s):

Hyun Tae Kim ◽

Tae Woo Kim ◽

Won Hwa Hong ◽

Kang Guk Lee ◽

Kim Kang Min

Keyword(s):

House Dust ◽

Building Materials ◽

Emission Rate ◽

Emission Rates ◽

Residential Homes ◽

Chemical Substances ◽

Other Substances ◽

Materials Used ◽

High Level ◽

Qualitative Analyses

Recent studies have reported that indoor house dust contains a large volume of SVOC chemical substances such as phthalates. This study measured the SVOC emission rate from various types of building materials and conducted quantitative and qualitative analyses on the emitted substances. DBP and DEHP were detected in all building materials based on the result obtained from measuring the building materials produced in Japan, South Korea, and China. The DBP and DEHP emission rates (95 percentile) from the building materials used for the measurement in this study were 2.56 [μg/m2・h] and 11.63[μg/m2・h] respectively. Larger DBP and DEHP emission rate from building materials are believed to be the reason why a high level of DBP and DEHP is detected in house dust found in residential homes compared to other substances.

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