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Register a new userEvaluation of Strength, Degree of Conversion of Provisional Materials Based on Di-Methacrylate’S (in Vitro)
تقييم متانة و درجة تحول مواد راتنجية تعويضية مؤقتة أساسها ثنائي ميتاكريلات مخبرياً
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Damascus University ورقة بحثية
Publication date
2011
fields
Dentistry
and research's language is
العربية
Authors
ميرزا علاف( باحث )
Created by
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طورت مواد راتنجية أساسها ثنائي ميتاكريلات لتحسين الخواص الميكانيكية و الفيزيائية للعوض المؤقت. هدفت هذه الدراسة إلى تحري متانة و عمق تماثر ثلاث مواد تعويض مؤقت ثنائية ميتاكريلات، و واحدة أحادية شاهدة بإخضاعها لاختبارات متانة الحافة، و متانة الشد القطري و درجة التحول.
New resin systems( di-methacrylates) were developed to improve the mechanical and physical properties of provivinal to investigate mechanical srength(edge- strength, diametrical tensile strength) and polymrrization(degree of conversion) of three newdi-methacrylates provisionals, and one of mono-methacrylate.
References used
Moszner N., F. K., Angermann J.( 2008). " A partially aromatic urethane dimethacrylate as a new substitute for Bis-GMA in restorative composites" Den. Mater. 24(5): 694-699
Podgorski M., (2011). "Synthesis and characterization of acetyioxyprpolene dimethacrylate as a new dental monomer" Den. Mater. 27(8): 748-754
Baroudi K., S. A., Silikas N. (2007). "Shrinkage behavior of flowable resin-composites related to conversion and filler-fraction" Journal of Dentistry, 35(8): 651-655
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Background& Objective: Acrylic resin, poly-methacrylate provisional materials, have been no longer used
because of low strength, poor marginal fit, low resistance, and color stability. New resin systems, such as
higher (meth) acrylates, and di-meth
acrylate were developed to improve the mechanical and physical
properties.
Investigate polymerization shrinkage-strain, and Exo-thermic peak-temperatures of three new provisional
materials based on di-methacrylate, and one of mono-methacrylate.
macrocyclic hydrazone Schiff base was synthesized by reaction of
succinicdihydrazide, Adipicdihydrazide with acetylacetone, adipicdihydrazide
with terephtaldialdehide and sebacicdihydrazide with terephtaldialdehide.
The aim of this study is to determine strength of adhesive single-lap joints of
Aluminum alloys which are widely used in geometric applications. It was investigated to
define the influence of overlap length and surface roughness value on shear stre
ngth of
achieved adhesive joints. It was used Epoxy and Acrylic adhesives to prepare adhesive
joints and all the specimens were subjected to axial tensile tests and the results are
presented as a comparison.
Results of those tests showed that shear strength increased with increasing each of
overlap length and surface roughness of adherends and Acrelicadhesiveproduced4better
results according to failure mode of tested samples.
The selection of recording material is an important factor to be considered in
making interocclusal records. Many materials are available to record interocclusal relations , but they
differs in their accuracy during mounting the casts on the articu
lator.
Purpose: The purpose of the study was to compare of four interocclusal recording materials in their effect
on the relationship of the casts, and to determine the most accurate material.
This study was conducted at the biotechnology laboratory of AnimalWealth
Research Administration, General Commission for Agricultural Research in
order to compare the effect of different media on In vitro maturation (oocytes
matured at 39 C° under
5% CO2 for 24 h), fertilization، and culture (7 days
postfertilization) in humidified atmosphere 95% on bovine embryo production.
Syria
سورية
وسط الإنضاج
وسط تنمية الأجنة مخبرياً
وسط الإخصاب
عامل تهيئة النطاف في المختبر
إنتاج اجنة الأبقار مخبرياً
(Tissue culture medium (TCM
(Synthetic oviduct fluid (SOF
(Tyrode Albumin Lactate Pyruvate (TALP
(Penicillin Hypotaurin Epinephrine (PHE
bovine oocytes
In vitro embryo production
المزيد..
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