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Register a new userEvaluating Curing Efficiency of a Second Generation- Light Emitting Diode Curing Unit to Cure two Kinds of Composite Restorative Materials
تقييم كفاءة تصليب جهاز من الجيل الثاني من الأجهزة ذات الصمامات ثنائية الأقطاب عند التصليب الضوئي لنوعين من مواد الترميم الراتنجية
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Added by
Damascus University ورقة بحثية
Publication date
2011
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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هدفت هذه الدراسة إلى تحري قدرة جهاز من الجيل الثاني من الأجهزة ذات الصمامات ثنائية الأقطاب على تصليب نوعين من الراتنج المركب، يعتمد أحدهما على الكامفركينون كمحفز ضوئي وحيد في حين يحتوي الآخر على محفز مساعد فضلاً عن الكامفركينون.
This study aimed to investigate curing efficiency of a second generation - light emitting diode(LED) curing unit to polymerise two kinds of resin ,one depends upon camphorquinone as a single photo initiator while the other uses co-initiator besides camphorquinone .
References used
Franz A, Konig F,Anglmayer M,Rausch-Fan X,Jille G ,Rausch WD,Lucas T,Sperr W,Schedle A. Cytotoxic effect of packable and nonpakable dental composite. Dent Master 2003;19(5):382-392
Caldas DB,de,Almeida JB, Correr-Sobrinho L, Sinhoreti MA, Conasani S. influence of curing tip distance on resin composite knoop hardness number ,using three different light curing units. Oper Dent 2003;28(3):315-320
Mills RW , Stahl F, Ashworth SH, Jandt KD,. Light-Emitting Diode (LED) polymerization of dental composites: Flexural Properties and Polymerization Potential. Biomaterials2000; 21(13):1379-1385
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The present study aimed to assess the influence of curing
distance on the loss of irradiance and power density of two curing
light devices of two different systems.
Two dental curing devices were used in this study,
Halogen unite (Chromalux 75) and light emitting diodes (LED)
(Bluedent smart),
This study was performed in order to determine the temperature
rise under human dentin discs of different thicknesses of primary teeth
during the light curing process with conventional halogen lamp and
LED.
Curing shrinkage with its resulting stresses inside the restoration, and
microleakage with its resulting marginal discoloration are the most important problems that face
composite restorations. The new studies try to use a lot of ways to reduce it.
One of these ways is using
soft-start light curing.
Investigate the clinicale influence of using soft start light curing method on marginal discoloration of
composite restoration of primary molars.
The aim of the study was to compare the effect of tea and yerba mate on color
stability of two types Nano-filled resin composite materials.
The use of composite materials, and modern technology of plasma
spraying has provided a possibility to obtain a coating with very special
properties. Owing to physics- chimecs changes, changeable valence, low
thermodynamic strength for Ferro-oxide
s the coating, which made from
Ferro oxide composite, has very high specifications investment, and
provides protection for machines which work in difficult circumstances.
Ferro oxide composites behavior, during spraying, studies shows that
changes which took place in these materials are similar to those which
happened during sintering. An influence of plasma generator current
intensity has been studied on microhardness of forming phases, on phases
structure propositions, and on porosity. Microhardness increase when
current intensity was increased, while porosity is decreased.
Wear resistance has also been studied for this post in both, dry and wet
(oily) friction circumstances. Comparable with other materials it has been
found that Ferro oxide materials had a high resistance for wear and a low
friction coefficient.
It is also important that when selecting the spraying materials, to
determine requirements which we need from coating and to analyze its
investment circumstances on specific elements of machines to obtain a
high investment properties coating.
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