ازداد استخدام الأدوات اللبية الآلية المصنوعة من النيكل تيتانيوم بشكل كبير في العقدين الأخيرين، و لكن ما زالت قابليتها للكسر أهم مشكلة تواجه مستخدميها، و يدعي كثيرون أن عملية نزعها صعبة جداً و كثيراً ما تبوء بالفشل، إذا ما قورنت مع أدوات الفولاذ اللاصدئ، و من هنا كان الهدف من هذه الدراسة المقارنة بين تأثير نوعي الأدوات اللبية المكسورة على نجاح تقنية الميكروسونيك في نزعها أو تجاوزها و مدى تأثير ذلك على صعوبة المحاولة.
The use of Nickel-Titanium rotary instruments have been increasing in the last two
decades. But the probability of fracture is still the most important hindrance that confuse
the practitioners. And many clinicians claim that the removal process is very difficult and
often irretrievable. When compared with stainless steel instruments, hence this study aims
to compare between the two types effect of endodontic instruments on the success of
microsonic technique in removing or bypassing it, and the degree of difficulty.
References used
NAGARATNA, P.J; SHASHIKIRAN, N.D. In vitro comparison of NiTi rotary instruments and stainless steel hand instruments in root canal preparation in primary and permanent molar. J Indian SocPedod Prev, vol.24(4) , 2006 , P186-91
SOUTER, N.J; MESSER, H.H. Complications associated with fractured file removal using an ultrasonic technique. JOE, vol.31(6), 2005, p450-2
MADARATI, A.A; HUNTER, J.M. Management of Intracanal Separated Instruments. JOE , vol.39, no.5, 2013, P569-81
It was recently noted that there are
serious trials to develop dental materials used in the prosthodontics.
As a result of this development, some veneering ceramic systems
used in metal-ceramic crowns have been appeared. In view of the
major impo
Ultrasonic Tips is considered one of the common tool used in the management of separated instruments in the root canal, . , this research aimed to evaluate the temperature rise of the outer surface of the root when using ultrasonic tips to remove separated instruments from mesiobuccal canal of the lower molars.
Background
Resin bonded fixed partial dentures appeared to prevent the excessive preparation of dental
tissue
Investigation of surface treatments to improve the bond of resin cements to metals may contribute
to the longevity of these restoration
The Rootcanal treatment is considered as the most accurate one
followed in (( dentistry )), which need a right diagnosis and exact
treatment steps to be performed completely for an excellent
prognosis treatments ended by along time –perfect success.
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