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Register a new userInfluence of curing distance on decreasing light intensity of two curing light devices of two different systems (Halogen and LED). In-Vitro.
تأثير مسافة التصليب على انخفاض الشدة الضوئية لجهازي تصليب ضوئي من نظامين مختلفين (هالوجيني و ثنائي الأقطاب). دراسة مخبرية
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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هدفت هذه الدراسة إلى تقييم تأثير مسافة التصليب على انخفاض الشدة الضوئية لجهازي تصليب ضوئي من نظامين مختلفين ( هالوجيني و ثنائي الأقطاب ). استخدم في هذا البحث جهاز تصليب ضوئي هالوجيني (Chromalux 75) و جهاز تصليب ضوئي ثنائي الأقطاب (Bluedent smart).
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),
References used
AGUIAR, F 2005- Hardness and diametral tensile strength of a hybrid composite resin polymerized with different modes and immersed in ethanol or distilled water media. Dental Material, Vol.21:.1098-1103
NEUMANN, M 2005-Molar extinction coefficients and the photon absorption efficiency of dental photoinitiators and light curing units. J Dent, Vol.33.525-532
YOON, TH 2002- Degree of Polymerization of Resin Composite by Different Light Source. Journal of Oral Rehabilitation, Vol.29.1165- 1173
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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.
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 .
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.
Aim of the study was To Compare the efficiency of R
ProTaper and R-Endo retreatment files in the removal of
conventional gutta-percha and resin coated gutta-percha and
time required. 60 extracted single root premolars were selected,
and then divi
ded into two groups according to the obturation
material. Next, each group was divided into two groups
according to the methods of retreatment.
Resin based composite considers substantially as a restorative
material in clinic. Dentists concern in placement resin composite
restorations with Long term survival.
Materials and Methods: 20 Non carious human third molars, class I
cavity was pr
epared in every molar, restored with methacrylate
resin composite Tetric EvoCeram. The restored teeth were
subjected to thermocycles. Specimen was randomly divided into
two groups : the first group 10 restorations, were repaired by
Cojet® (3M ESPE, Germany) and restored by Filtek™ P90, the
second group 10 restorations also repaired by Cojet ® but restored
by Filtek™ Z350 XT. After that all teeth were subjected to
thermocycles again, later immersed in 0.5% basic fuchsin solution
for 1 s. The teeth were transversely sectioned and observed under
a stereomicroscope. The degree of dye penetration was recorded
and analyzed.
Results: No statistically significant differences in microleakage
were observed between two groups either with low shrinkage
Silorane resin composite or methacrylate resin composite
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