Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userA comparative study between types of composite in terms of hardness
دراسة مقارنة بين أنواع من ( الراتنج المركّب ) الكمبوزيت من حيث القساوة
1673
0 70
0
(
0
)
Added by
Tishreen University ورقة بحثية
Publication date
2015
fields
Dentistry
and research's language is
العربية
Authors
منذر حداد( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
تألّفت عيّنة البحث من 30 قالب من الراتنج المركّب ، قسّمت إلى ثلاث مجموعات متساوية ، 10 من الراتنج المركب Z-250 من شركة ESPE 3M ، 10 من الراتنج المركب Supreme من شركة ESPE 3M، 10 من الراتنج المركب Quixfil من شركة Dentsply تم اختبار رقم القساوة لكل عينة على حدى، و كان الهدف من ذلك بيان دور تركيب الراتنج المركب في تحديد مقدار قيمة هذه القساوة و ذلك من خلال الفروقات في رقم هذه القساوة و دور القساوة في تحديد الخواص الميكانيكية لترميمات الراتنج المركب كون هذه الخاصية هامة لفهم الخواص الميكانيكية لكثير من المواد الترميمية، و النتيجة أن هناك دلالة إحصائية ما بين راتنجي الـ Quixfil و الـ Z-250 من جهة و راتنج الـ Supreme من جهة أخرى .
The research project sample consisted of 30 blocks of composite resin , these blocks where divided into three equal groups , 10 of composite resin Z-250 from 3M ESPE Company , 10 of the composite resin Supreme from 3M ESPE Company ,10 of the composite resin Quixfil of Dentsply company, and has been testing the hardness Number, each sample individually. The aim of the previous procedures was to show the role of composite resin structure in determining the hardness number Through differences in the hardness number and the role of this hardness determining the mechanical properties for composite resin restorations cause of the importance of this property to understand the mechanical properties for a lot of restorative materials. And the result is that there is a statistically significant between the resin Quixfil and the Z-250 on the one hand and the Supreme resin on the other hand.
References used
BOWEN RL. (1956) Use of epoxy resins in restorative materials. J Dent Res 35: 360-9
BUONOCORE MG.DAVILD J. (1973).Restoration of fractured anterior teeth with ultra – violet –light polymerized bonding materials. A new technique. JADA 86:1349-54
Leinfelder KF. Posterior composite resins : the materials and their clinical performance . Am Dent Assoc .1995 May ;126(5) :663-4, 667-8, 671-2 passim
rate research
Read More
The aim : This study aims to evaluate and compare the microleakage between nano
and hybrid composite.
Materials and Methods : the sample consisted of forty extracted premolars for
orthodontics purposes , class v cavities were prepared with a speci
fic dimensions on the
buccal surface. The sample divided into two groups ; group A restored by nanocomposite (
Z350) , group B restored by hybrid composite ( Z250) , after that, the samples were placed
in the incubator with thermo cycling for a month ,The samples were then immersed in 0.5
% methelyne blue dye for 24 hours , each tooth was mesial-distal sectioned vertically ,
finally, of all samples was studied using stereomicroscope to evaluated the microleakage .
Results : there was no statistical significant difference between the nano and hybrid
composite according to microleakage.
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.
Esthetic orthodontic archwires (fiber reinforced composite archwires) are
considered as the latest addition to orthodontic's world, and the load deflection rate is thought to be the
most important mechanical property of archwires which has strong e
ffect clinically, and this property is
affected by the cross section diameter and the material's type, for these reasons this study aims to
investigate the effect of the material's type and the cross section diameter of orthodontic archwires on the
load deflection rate of fiber reinforced composite(FRC) archwires with a diameter of 0.014 inch and
0.016 inch which are suitable for the leveling and alignment stage, and to compare these new materials
with Nickel titanium(NiTi) archwires .
Ring-opening monomers with a reduced shrinkage stress “silorane" are being
used as matrix resins for recently introduced dental composites. Thisstudy aimed to analyzethe
mechanical behavior(Flexural StrengthFS, Abrasion Resistance AR) of the silora
ne-based composite
(Filtek P90) in comparison to two methacrylate-based composites (Tetric- Evo Ceram & packable
hybridTetric Ceram HB).
Regarding the sealing ability of restorative dental materials, this
study was done to assess the microleakage of class V cavities
restored with a new self-adhesive flowable composite resin and
compare to different flowable materials.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
