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Badania eksperymentalnych giomerów fotoutwardzalnych do stosowania w stomatologii odtwórczej

Karaś J., Ciołek L.

Prace Instytutu Ceramiki i Materiałów Budowlanych

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2011

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R. 4, nr 8

7-20

PL

W artykule przedstawiono badania eksperymentalnych giomerów fotoutwardzalnych przeznaczonych do stosowania w stomatologii odtwórczej do wypełniania ubytków. Wszystkie otrzymane giomery oraz materiały porównawcze zostały poddane badaniom w zakresie wytrzymałości na zginanie i wytrzymałości na ściskanie. Spośród wytworzonych giomerów najwyższą wytrzymałością na ściskanie i zginanie charakteryzuje się giomer MG-6. Giomery wytworzone z udziałem wypełniacza sz-j G-1 spełniają wymagania stawiane materiałom stosowanym do odbudowy tkanek zębowych na innych powierzchniach niż zwarciowe. Dla kompozytu MK-4 i giomeru MG-6 oznaczono ilości uwalnianych jonów F-do 7 dni. Z punktu widzenia oddziaływania kariostatycznego bardziej interesującym materiałem niż kompozyt MK-4 jest giomer MG-6 z uwagi na wyższy poziom uwalnianych jonów fluorkowych.

EN

In the article have been described the study of experimental photocured giomers for use in restorative dentistry for filling cavities. All obtained giomers and comparative composites were tested for flexural strength and compressive strength. Giomer MG-6 was characterized by the highest strength parameters among developed giomers. All giomers, obtained with part of g-i filler G-1, meet the requirements of materials for use in dental tissues reconstruction on other surfaces than occlusal. For the composite MK-4 and giomer MG-6 the amounts of releasing F- ions were determined in 7 days. Giomer MG-6 is more interesting material than the composite MK-4 from the standpoint of the cariostatistic impact because of higher level of fluoride ions releasing.

2

Polymers in mining industries applications - a short review

Rasek M., Drozd J.

Polish Journal of Applied Chemistry

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2009

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Vol. 53, nr 3

267-275

EN

A wide range of polymer-based materials arc used in the mining industry. Such materials could be applied for strata injection, rock scaling, cavity filling and rock bolting. The polymers used at mines are mainly: polyurethanes, phcnol-formaldchydc resins, urea-formaldehyde resins and unsaturatcd polyester resins. An overview of polymer-based materials used in the mining industry were given. Organic materials for mining as well as methods of application were described. The advantages and disadvantages of materials based on different polymers were presented.

3

A review of monitoring for nanoimprinting

Hocheng H., Nien C. C.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 24, nr 1

382-389

EN

Purpose: This article provides an overview of the monitoring technique for nanoimprint. Optical and electrical monitoring approaches that have the potential for detecting and monitoring mold deformation and cavity filling in nanoimprint will be reviewed. The major part is devoted to the review of an in-situ mold filling monitoring system based on capacitance measurement for nanoimprinting operations. Design/methodology/approach: In carrying out the capacitive monitoring method, a broad range of areas including tuning the imprint process, designing a reliable capacitive sensor, finding out the right materials and a suitable surface micromachining process for sensing electrodes, and data analysis have seen covered. In addition, to measure the continuous variations in capacitance, a series of imprinting experiments have been performed isothermally, and the capacitance values have also been measured at various imprinting stages. Findings: The final stage of mold filling near the end, which is of particular interest, can be monitored and the experimental results have demonstrated that the capacitance measurements indeed provide the in-situ information that can tell the mold filling status during nanoimprinting. Research limitations/implications: The use of neural networks to model the functional relationship between the capacitance value and the rising height of mold filling is recommended as another potential area for future research to realize the ultimate objective of providing online real-time mold filling information for imprinting process control. Practical implications: Throughout the study, the authors conclude the proposed capacitance measurement technique is a promising approach for monitoring mold filling in nanoimprinting process, and the practical application of the conducted research is feassible with certain improvement of the robustness of the monitoring technique in harsh environment of higher imprinting temperature. Originality/value: The reviewed monitoring methods are based on the authors' approved and pending patents. They are considered pioneering works for the research community of nanoimprint techniques and as the basis of making nanoimprint process automated.