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Register a new userStudy of propolis effect on bonding of posterior composite restorations to dental tissues by scanning transmission electron microscope ( in vitro)
دراسة مخبرية لاختبار تأثير العكبر على ارتباط حشوات الكومبوزيت الخلفية مع النسج السنية بواسطة المجهر الالكتروني الماسح
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Added by
Damascus University رسالة ماجستير
Publication date
2014
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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يستخدم العكبر بشكل مباشر على العاج السني لتقليل الحساسية السنية التالية لترميمات الكومبوزيت الخلفية ويهدف البحث إلى اختبار تأثيره على ارتباط الكومبوزيت بالعاج السني في حشوات الكومبوزيت الخلفية بواسطة المجهر الالكتروني الماسح وتم تقييم مدى عمق نفوذ الراتنج المركب ضمن القنيات العاجية من خلال مقارنة تكرار وجود الاستطالات الراتنجة وقياس أطوالها وقياس سماكة الطبقة الهجينة في مجموعات العينة الثلاث .
Propolis is used directly on dentin to reduce dental sensitivity following posterior composite restorations. The research aims to test its effect on the bonding of composite to dentin in posterior composite fillings by scanning electron microscopy. The depth of penetration of the composite resin within the dentinal canals was evaluated by comparing the frequency of the presence of resin protrusions and measuring Their lengths and the thickness of the hybrid layer were measured in the three sample groups.
References used
أ.د . النبي صفوح كتاب المواد السنية الترميمية , منشورات جامعة دمشق
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This research is the first descriptive and classifiable study of the Syrian
spores of mosses in Syria and Arab world by using the technique of scanning
electron microscope.
Samples have been collected from several areas from Syria and their names
have been defined and classified earlier.
The study of nine Spieces of Spores have been completed and their shapes,
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distribution by scanning electron Microscope are done in Jena University,
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It has been noticed clear differences in Spores, in the Shape of concavity of
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standards which are used in Classification of mosses.
Almond seed wasp Eurytoma amygdali . End is a serious pest on
almond orchards which causes an economic losses in production.
This study was carried out for the morphological description of the
male stages of this pest (larva, pupa and adult) using
stereomicroscope and Scanning Electron Microscope.
The of this study was to evaluate the bonding strength of a
posterior composite restorations when two different types of
equipment methods were used for preparation of dentin (Erbium-doped
yttrium aluminum garnet laser (Er:YAG ) and diamond burs).
This study specimen consisted of Eighty molars, was divided
randomly into two main groups (40 molars were prepared with
diamond burs, and 40 molars were prepared with laser Er: YAG).
Laser use and applications in dentistry has increased dramatically in the last
years. Laser etching of enamel may provide an alternative for conventional acid etching. The aim of this
study was to evaluate, under Scanning Electron Microscope(SEM),
enamel surface morphology after
laser irradiation with or without the addition of photoabsorber (black ink); with or without acid etching.
laser enamel etching produced surface
roughness that might be used for the infiltration and subsequent mechanical retention of resin.
Partial veneer crown has appeared to prevent the excessive preparation of
dental tissue with complete crown and the major reason success of this prosthesis could be strength of
cementation.
Therefore the latest studies have been focusing on develo
ping new material and technique to increase the
bonding strength and using new technique for surface treatment or change type of metal alloy.
The aim of this search is to study the bonding resin cement strength to different type of metal alloy due to
surface treatment.
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