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Register a new userRemoving Calcium Hydroxide Dressing from Apical Third of the Root Canal By Using Irrigation Needles and EndoVac method (In Vitro)
إزالة ضماد ماءات الكالسيوم من الثلث الذروي من القناة الجذرية مخبرياً باستخدام طريقة إبر الإرواء و الشفط الذروي
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علي معروف( باحث )
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الهدف من البحث: مقارنة فعالية إبر الإرواء NaviTip 30 G و جهاز الشفط الذروي EndoVac بالغسيل بمحاليل الإرواء هيبوكلوريت الصوديوم و الـكلور هيكسيدين 2% في إزالة ضماد ماءات الكالسيوم من الجزء الذروي للقناة الجذرية. المواد و الطرق : تألفت عينة البحث من (40) سن وحيد الجذر و القناة, و تم قص تيجانها حتى طول 16 ملم. حُضرت الأقنية للقياس الذروي 40 باستخدام النظام اليدوي ,ProTaper Universal Hand ثم وضع كل سن ضمن قالب سيليكوني صلب يسمح بإعادة جمع السن بعد الشطر طولياً, ثم تم شطر الأسنان وفق المحور الطولي للسن, ثم تم تحضير ميزاب صنعي ضمن القناة في أحد النصفين في الثلث الذروي بطول 4 ملم عرض 0,2 ملم و عمق 0,5 ملم على بعد 1 عن الذروة. تم ملء الميزاب بضماد ماءات الكالسيوم, ثم أُخذت صورة للميزاب الصنعي بالمجهر تكبير 40X, ثم تم إعادة جمع شطري السن و ختمه بالشمع و وضعه ضمن قالب السيلكون, ثم قُسمت العينة إلى مجموعتين.
Aim of Study: The antimicrobial intracanal medication was used widely, and the most common was calcium hydroxide dressing, which must be removed from the root canal before obturation, hence this study aimed to comparative efficacy of EndoVac and NaviTip 30 G irrigation Needles with Naocl and CHX 2% in removing calcium hydroxide dressing from the apical third of root canal. Materials &Methods: Forty single root and canal teeth were decoronated to the length of 16 mm. Each root was prepared to the apical foramen using ProTaper Universal Hand System to size 40. Each tooth was embedded in silicone putty to create a set matrix, which allowed reassembly of the tooth for irrigation tests after splitting longitudinally. Then each tooth was split into two halves and an artificial groove (L:4, W:0,2 , D:0,5 ) was cut in one half of the root canal wall 1 mm from the apex ,which was then filled with a Ca(OH)2 paste. Digital images were taken before reassembling under stereomicroscope X40. Subsequently the two halves of roots were reassemble with wax , and remounted in their silicone matrixes, then divided into 2 groups.
References used
BYSTRO.M A, S.G., Bacteriologic evaluation of the efficacy of mechanical root canal instrumentation in endodontic therapy. Scandinavian Journal of Dental Research, 1981. 89: p. 321-8
FAVA. L. , S.W., hydroxide pastes: classification and clinical indications. International Endodontic Journal,, 1999. 32: p. 257-82
QRSTAVIK D, K.K., MOLEVN O, Effects of extensive apical reaming and calcium hydroxide dressing on bacterial infection during treatment of apical periodontitis: a pilot study. International Endodontic Journal, 1991. 24: p. 1-7
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Residual Calcium Hydroxide dressing on the root canal is considered
one of the reasons of endodontic treatment failure. So ,the removal of
this dressing completely before filling is required. The aim of the study
was to evaluate the efficiencies o
f passive ultrasonic irrigation And
increasing the instrumentation of the medicated canal to the file one
size larger than MAF in removal of Calcium Hydroxide dressing.
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.
Objective: the Purpose of this study was to evaluate in vitro the
apical microleakage of methacrylate risen-based sealer (EndoREZ )
after root canal irrigation with sodium hypochlorite or chlorhexidine
digluconate.
Aim: to compare the apical sealing ability of three root canal sealers in human
extracted teeth using dye penetration.
Materials and Methods: thirty extracted human maxillary teeth were instrumented
1mm short of the anatomical apex and randomly as
signed to three groups (n=10),
according to the root canal sealer used for obturation. The teeth were divided into three
experimental groups and obturated by cold lateral compaction of gutta-percha and one of
the following sealers: group I, Zinc oxide and Eugenol sealer; group II, Adseal; group III,
Apexit plus.The teeth were covered with nail varnish to within 2-3mm of the apical
foramen and immersed in 2% methylene blue for 24 hours.After this period, the teeth were
washed and cut longitudinally for apical leakage measurement inside the canal.
Results: Statistical evaluation of the results showed no significant difference in the
leakage between Adseal and Apexit plus (P =0.99). Leakage with ZOE was significantly
lesser than Adseal (P=0.004) andApexit Plus (P=0.003).
Conclusions:under the condition of this study, it can be concluded that ZOE presents
lower apical leakage than Adseal and Apexit plus, and there was no significant difference
in leakage between Adseal and Apexit plus.
A good apical sealing is considered the key of the successful endodontic
treatments. The aim of this study was to compare the apical seal of GuttaFlow and AH Plus using single
cone and lateral condensation technique.
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