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  • 1
    Digitale Medien
    Digitale Medien
    Influence of light intensity from different curing units upon composite temperature rise (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 32 (2005), S. 0 
    Details
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: summary  The unavoidable consequence of composite resin photopolymerization is temperature rise in tooth tissue. The temperature rise depends not only on the illumination time, but also on light intensity, distance of light guide tip from composite resin surface, composition and shade of composite resin and composite thickness. The most commonly used units for polymerization today are halogen curing units, which emit a large spectrum of wavelengths. A proportion of the spectrum has no influence on degree of conversion and therefore causes unnecessary temperature rise. Units based on light source – blue light emitting diodes (LED), as an alternative for halogen curing units, have been introduced in clinical practice. The aim of this study was to show the influence of the light intensity of curing units Elipar Trilight, Astralis 7 and Lux-o-Max unit on temperature rise in composite resin sample of Tetric Ceram. The temperature was measurement with Metex M-3850 D multimeter with the tip of temperature probe put into unpolymerized composite resin sample 1 mm depth. The highest temperature rise was recorded with standard curing mode for Elipar Trilight halogen curing unit (13·3 ± 1·21 °C after 40 s illumination), while the lowest temperature rise was recorded for the Lux-o-Max unit based on LED technology (5·2 ± 1·92 °C after 40 s illumination).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2842.2004.01418.x
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  • 2
    Digitale Medien
    Digitale Medien
    Degree of conversion and temperature rise during polymerization of composite resin samples with blue diodes (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 28 (2001), S. 0 
    Details
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: To ensure an adequate clinical composite filling light source for photopolymerization is of great importance. In everyday clinical conditions commonly used unit for polymerization of composite material is halogen curing unit. The development of new blue superbright light emitting diodes (LED) of 470 nm wavelengths comes as an alternative to standard halogen curing unit of 450–470 nm wavelengths. The purpose of this study was to compare the degree of conversion (DC) and temperature rise of four hybrid composite materials: Tetric Ceram, Pertac II, Valux Plus and Degufill Mineral during 40 s illulmination with standard halogen curing unit Heliolux GTE of 600 mW cm−2 intensity, Elipar Highlight soft-start curing unit of 100 mW cm−2 (10 s) and 700 mW cm−2 (30 s) intensity and 16 blue superbright LED of minimal intensity of 12 mW cm−2 on the surface and 1 mm depth. The results revealed only a little bit higher DC values in case of polymerization with even 66 times stronger halogen curing units which showed twice higher temperature than blue diodes. Temperature and DC obtained are higher on the surface than on 1 mm depth regardless on the light source used.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2842.2001.00709.x
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  • 3
    Digitale Medien
    Digitale Medien
    Photopolymerization of composite resins with plasma light (2002)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Summary Everyday improvements in components and characteristics of composite materials have induced faster development of curing units. Besides standard halogen curing units and soft-start photopolymerization light sources, some experiments with argon and pulsed laser light and low intensity blue superbright light emitting diodes have been made. On the other hand, rapid polymerization with strong plasma light is also clinically applicable. The aim of this study was to measure the degree of conversion and temperature rise for three restorative composite materials: Tetric Ceram (Vivadent, Schaan, Liechtenstein), Pertac II (ESPE, Seefeld, Germany) and Z100 (3M Dental Products, St Paul, MN, USA) during polymerization with plasma light Apollo 95E (DMDS, Dental/Medical Diagnostic Systems, Fleury d'Aude, France) and compare it with the results of polymerization with a halogen curing unit, Elipar Trilight (ESPE, Seefeld, Germany). The results revealed the degree of conversion values in the case of polymerization with plasma light to be almost equal to those obtained by curing with the halogen curing unit, whereas the temperature rise was almost negligible.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.00897.x
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  • 4
    Digitale Medien
    Digitale Medien
    Composite conversion and temperature rise using a conventional, plasma arc, and an experimental blue LED curing unit (2002)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: The objective of this study was to evaluate the degree of conversion and temperature rise in three different composite materials when illuminated by an experimental light source [blue superbright light emitting diodes (LEDs)] and compared with plasma light and traditional photopolymerization unit. The degree of conversion and temperature rise were measured using Fourier transform infrared (FTIR) spectroscopy and digital multimeter, respectively. The results revealed significantly higher degree of conversion values in case of conventional curing than with other two light sources whereas temperature rise was significantly lower when blue LEDs and plasma light were used. There were great differences in light intensities between blue LEDs of only 9 mW cm–2 compared with plasma light of 1370 mW cm–2 and Elipar II of 560 mW cm–2. Better match of LED spectral distribution peak to camphorquinone absorption distribution peak probably explains much lower intensities used for similar photopolymerization effect like in the case of rapid plasma lamp curing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.00866.x
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  • 5
    Digitale Medien
    Digitale Medien
    Paper-strip chromatography of beef pancreas ribonuclease and insulin
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 77 (1958), S. 20-30 
    Details
    ISSN: 0003-9861
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/0003-9861(58)90036-5
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    The biochemistry of protamine from the milt of Mugil cephalus
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 96 (1962), S. 280-286 
    Details
    ISSN: 0003-9861
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/0003-9861(62)90410-1
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  • 7
    Digitale Medien
    Digitale Medien
    A contribution to paper-strip chromatography of proteins
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 57 (1955), S. 334-339 
    Details
    ISSN: 0003-9861
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/0003-9861(55)90296-4
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  • 8
    Digitale Medien
    Digitale Medien
    Resolution of some protein mixtures by gradient elution paper chromatography
    Amsterdam : Elsevier
    Analytical Biochemistry 1 (1960), S. 502-510 
    Details
    ISSN: 0003-2697
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/0003-2697(60)90064-6
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