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Register a new userThe effect of oblique forces on three types of corown-root restorative techniques (in vitro study)
تأثير القوى المائلة في ثلاثة أنواع الترميمات التاجية الجذرية ( دراسة مخبرية )
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Added by
Damascus University رسالة ماجستير
Publication date
2015
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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قارنت هذه الدراسة بين متانة الترميم بوتد وقلب معدني مصبوب والترميم بتقنية Endocrown معدني مصبوب وطريقة بناء قلب من الراتنج المركب دون وتد جذري وذلك عند تطبيق قوى الضغط المائلة بزاوية 45 بواسطة جهاز الاختبارات الميكانيكية
This study compared the durability of a cast metal wedge restoration, a cast metal endocrown restoration, and a method of constructing a composite resin core without a root wedge when applying 45-degree inclined compressive forces using a mechanical testing device.
References used
السايس سهام , البني صفوح. المرجع في المواد السنية . منشورات جامعة دمشق , دمشق 103-120
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The aim of this study was to evaluate and compare the effect of irrigation
solutions on the dentin flexural strength .(20) extracted third molars were
gathered with age avarege (18-24) years old, and the dentine bars that will
be prepared and designed for study with similar dimensions (width 1
mm, thickness 2 mm, Length of at least 7 mm).
The present study aimed to compare the epithelium tissue of mucosa layer of
gastrointestinal tract in three types of lower vertebrates: Scyliorhinus canicula, Sparus
aurata, Salamandra infraimmaculata. The results of the histological and comparativ
e
study showed that the majority of digestion system parts were lined with simple
epithelium tissue while others were lined by pseudostratified epithelium tissue. Goblet
cells were distributed in all studied parts of digestion systems with density in some
locations. Esophagus was characterized by ciliated epithelium tissue, and the tubular
glands were presents in the stomach mucosa. Concerning the Lumina properia, it was
visible in all digestive system parts with some differences according to the animal species
studied.
Few researchers have made a comprehensive study of the morphology of the
root canals of the primary molars. Thorough knowledge in internal anatomy of the primary molars is
useful in reducing the problems of endodontic therapy arising due to the ana
tomical variation in root
canals, which are clinically difficult to be detected.
Exploration the root canals of primary molars with regard to its number, variations, and accessory canals
in the furcation region.
the complication of the internal anatomy of primary molars causing complication in
endodontic treatment so the results of this study suggest avoiding pulpectomy in primary molars where
ever possible.
Ligating between brackets and orthodontic wire is considered
one of the important factor affecting the frictional resistance during sliding
movements.
Aim of study: For these reasons this investigation aimed to compare the
friction associating wi
th sliding movement for two types of brackets : selfligating
brackets and conventional brackets ; along stainless steel arch
wires.
The specimen consists of 72 extracted teeth with curved roots
(15-35)degree . They were cleaned and preserved in formalin
for 48 hours. Each tooth was mounted in a self curing acrylic
block. The samples were divided into three groups. Each
group
(24 canals) was instrumented with one of the systems
(WaveOne, Reciproc, OneShape).
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