تألفت عينة الدراسة من 72 سنا مقلوعة منحنية الجذور, درجة انحنائها (15-35) درجة, نظفت و حفظت في الفورمالين مدة 48 ساعة. تم قياس درجة الانحناء لكل جذر في العينة باستخدام برنامج AutoCAD2010. تم فتح الحجرة اللبية لكل سن و قياس الطول العامل, صبت القوالب الإكريلية للأسنان و غرست ضمنها. تم ترقيم العينة و قسمت إلى ثلاث مجموعات بالتساوي. حضرت كل مجموعة (24 سن) بنظام من أنظمة الدراسة (WaveOne, Reciproc, OneShape).
The specimen consists of 72 extracted teeth with curved roots
(15-35)degree . They were cleaned and preserved in formalin
for 48 hours. Each tooth was mounted in a self curing acrylic
block. The samples were divided into three groups. Each
group (24 canals) was instrumented with one of the systems
(WaveOne, Reciproc, OneShape).
References used
SCHILDER H 1974 Cleaning and shaping the root cana, Dent Clin North Am,18:269-296
COHEN S, 2002-Pathways of the pulp.Mosby, 8th ed. 231-292
WALIA H, Brantley W and Gerstein H 1988 An initial investigation of the bending and torsional properties of Nitinol root canal files,Journal of endodontics, 14(7): p. 346-351
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
Aim: to compare the shaping ability of NiTi hand instruments with Stainless- steel instruments in preparation of curved root canal in extracted teeth.
Materials and Methods: a total of 24 of curved root canal were randomly divided into two groups. O
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.
Aim of study: to compare the ability of four restorative materials (MTA - Composite
- Zinc Phosphate - Glass Ionomer Cement) in coronal sealing of the endodontically treated
root canal orifice in extracted teeth.
Materials and Methods: 60 extracte
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