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Register a new userThe Effect of Dentin Adhesives (total etch and self etch )on Marginal Leakage of Composite Resin Restorations (A Comparative Study )
تأثير المواد الرابطة للعاج (الكاملة التخريش و الذاتية التخريش) في التسرب الحفافي لترميمات الراتنج المركب (دراسة مقارنة)
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أروى خير( باحث )
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تهدف هذه الدراسة إلى تحديد وجود علاقة بين بعض الأنظمـة الرابطـة للعـاج (الكاملـة التخريش و الذاتية التخريش) و أثر هذه العلاقة في التسرب الحفافي حول ترميمات الـراتنج المركب.
The purpose of this study is to detect the relationship between dentin bonding systems (total etch and self etch) and the marginal leakage of composite resin restorations.
References used
Armstrong SR, Keller JC, Boyer DB. “The influence of water storage and c. factor on dentin –resin composite microtensile bond strength and debond path way utilizing a filled and unfilled adhesive resin”. Dent Mater 2001,17:268-276
Baner JF, Henson JL. “Microleakage; A measure of the performance of direct filling materials”. Oper Dent 1984,9:2-9
Baynes, Hermann, Swifte. “Update on dental composite restorations”. JAM Dent Assoc 1994,125:687-701
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Aim: to compare the effect of multiple usage and surface coarseness of diamond
burs on marginal microleakage of cervical resin composite restorations.
Materials and methods: sixty extracted premolars without caries were chosen. The
sample was rand
omly divided into three groups: n1=n2=n3=20. Group(1): class v cavities
were prepared using super coarse diamond burs, group(2): prepared by coarse diamond
burs, whereas group)3(: prepared by medium coarse diamond burs. All cavities were
restored by resin composite, then The teeth were thermocycled and immersedIn5%solution
of methylene blue dye for 12hours.Then the teeth were sectioned vertically, Dye
penetration was evaluated using a 10X stereomicroscope at the occlusal and gingival
margins. Data were collected and statistical analysis was conducted.
Results: The results showed that the multiple use of super coarse diamond burs
caused no significantly statistically affect on occlusal and gingival microleakage (P>0.05).
However, the multiple use of coarse and medium diamond burs caused significantly
statistically affect on gingival marginal microleakage (P<0.05).
The purpose of this study was to evaluate the effect of preetching
with phosphoric acid on microleakage of self-etch
adhesive material Adhes E in primary teeth.
The study involve 50 primary teeth(molars ,canins )which
extracted for orthodontic re
asons had no caries ,fractures ,crack.
The teeth were gathered in Hama university-pediatric dentistry
department. Class v cavity prepared in all samples.
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.
The etching primary teeth dentin is more important factors for bonding
composit with primary teeth dentin.
objective: The aim of this research is to know the effect of time etching with the phosphoric acid 37% by
duration (7 or 15 seconds) for the composite bonding strength with primary molar dentin towards shear
strength.
Aim: The aim of this study was to detect the effect of dressing period of calcium
hydroxide medicament on the apical marginal leakage after obturation of root canal
system.
Materials and Methods: 80 freshly extracted single rooted human teeth were
selected ,all the root canals were hand-instrumented. They were randomly divided into four
groups of 20 teeth each. Group A has no intracanal medicament , groups (B,C,D) were
dressed with Ca(OH)2 paste for a different periods of time (7,14,30) days respectively,
groups (B,C,D) were divided into subgroups of 10 teeth according to removing of dressing
. The removal of ca(OH)2was done by two ways, 1- By irrigating with distilled water and
drying with paper points . 2- Size 40 k-file was used in slightly filing motion up to the
working length then irrigated with distilled water and drying with paper points. After that
all groups were obturated with lateral compaction technique using gutta-percha points and
zinc oxide-eugenol cement. Then the access was sealed with GIC cement. The teeth were
immersed into 2% mythylene blue solution ,The specimens were placed in an incubator at
37 C ,with moisture at 100%, for 7 days .After that the roots were sectioned
longitudinally and examined with stereomicroscope and liner leakage was measured.
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