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Register a new userAn in Vitro Comparative study between Two Rotary Systems in the Removal of Two Different Filling Materials
دراسة مخبرية مقارنة بين نظامين آليين في التحضير لإزالة نورين مختلفين من المواد الحاشية
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Dentistry
and research's language is
العربية
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Shamra Editor
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هدفت هذه الدراسة إلى إجراء مقارنة بين كلاً من مبارد R ProTaper و مبارد R-Endo الخاصتين بإعادة المعالجة من حيث فعاليتهما في إزالة كلاً من الكوتابيركا التقليدية و الكوتابيركا المغلفة بالراتنج و الوقت اللازم لذلك. حيث ضمت الدراسة 60 ضاحك وحيد الجذر، قسمت هذه العينة إلى مجموعتين تبعاً للمادة المستخدمة في الحشو، ثم قسمت كلاً منهما إلى مجموعتين تبعاً للتقنية المستخدمة في إعادة المعالجة، مع حساب الوقت اللازم لإزالة المادة الحاشية.
Aim of the study was To Compare the efficiency of R ProTaper and R-Endo retreatment files in the removal of conventional gutta-percha and resin coated gutta-percha and time required. 60 extracted single root premolars were selected, and then divided into two groups according to the obturation material. Next, each group was divided into two groups according to the methods of retreatment.
References used
WALTON. R, TORABINEJAD. M, 2009- Endodontics: Principles and Practice. 4thed. Saunders, 209-210, 242-248, 259- 261p
ABBOTT. P, 2002 the periapical space: a dynamic interface, Austr Endodon J, Vol. 28. 96p
DHANYA. K, PRAVEEN. G, VASUNDHARA. S, 2008 A comparison of the relative efficacies of hand and rotary instruments in the removal of gutta-percha from the root canal during retreatment using stereomicroscope, Endodontology, 5- 11p
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The present study aimed to assess the influence of curing
distance on the loss of irradiance and power density of two curing
light devices of two different systems.
Two dental curing devices were used in this study,
Halogen unite (Chromalux 75) and light emitting diodes (LED)
(Bluedent smart),
Aim: to compare the shaping ability of two rotary systems (Protaper Universal and
Protaper Next) and K-file hand instruments in curved root canals of extracted human
molars.
Materials and methods:Thirty extracted molars with curved canals were cho
sen. The
curvature of root canals was determined (15-40o) then the sample was randomly divided
into three groups: n1=n2=n3=10. Group(1): was prepared using K-file hand instruments
(Stand), group(2): prepared by Protaper Universal (PTU), whereas group3: prepared by
Protaper Next (PTN).The curvature after preparation and Time preparationwere evaluated.
Data were collected and statistical analysis was conducted.
Results: The three instrument systems (PTU, PTN, Stand) have caused significant
change in original canal curvature(P<0.05). On the other hand, there were no significant
differences between systemsin straightening of canal curvature (P>0.05). However, both
systems: PTN, Stand were significantly faster than PTU during preparation of curved
canals (P<0,001).Conclusion: under the conditions of this study, it can be concluded
thatall instruments caused changing in original canal curvature. However, the new
generation PTN was faster than old one PTU.
The aim of this study was evaluation the effective of chelating
solutions 17% EDTA, 0.2% Chitosan and 10% Sodium citrate by
comparing the concentrations of chelated calcium ions after
(1min-5min-24h) of application. The study was performed on 45
extracted single-rooted sound human. The sample was randomly
divided into groups (n=3), each group 15 teeth that depend on the
used solution.
Resin based composite considers substantially as a restorative
material in clinic. Dentists concern in placement resin composite
restorations with Long term survival.
Materials and Methods: 20 Non carious human third molars, class I
cavity was pr
epared in every molar, restored with methacrylate
resin composite Tetric EvoCeram. The restored teeth were
subjected to thermocycles. Specimen was randomly divided into
two groups : the first group 10 restorations, were repaired by
Cojet® (3M ESPE, Germany) and restored by Filtek™ P90, the
second group 10 restorations also repaired by Cojet ® but restored
by Filtek™ Z350 XT. After that all teeth were subjected to
thermocycles again, later immersed in 0.5% basic fuchsin solution
for 1 s. The teeth were transversely sectioned and observed under
a stereomicroscope. The degree of dye penetration was recorded
and analyzed.
Results: No statistically significant differences in microleakage
were observed between two groups either with low shrinkage
Silorane resin composite or methacrylate resin composite
The aim of this study is to investigate the effect of early
coronal flaring on changing the working length of curved
canals by using NiTi rotary instruments and SS manual
instruments.
Forty five MB curved canals of upper/lower first and second
extracted molars were used.
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