نتایج جستجو برای: dentinal tubules

تعداد نتایج: 14345  

ژورنال: مجله دندانپزشکی 2018

Background and Aims: Increased tooth sensitivity is a common dental problem. One of the mechanisms of dentin hypersensitivity treatment is blocking dentinal tubules. The aim of this study was to compare the average closing dentinal tubules affected by carbonated Nano-hydroxyapatite and fluoride toothpaste using scanning electron microscope (SEM). Materials and Methods: The enamel of gingival b...

Journal: :Journal of endodontics 2009
Payman Kakoli Renu Nandakumar Elaine Romberg Dwayne Arola Ashraf F Fouad

The aim of this study was to determine the effects of patient's age on the prevalence and depth of bacterial penetration inside dentinal tubules. Fifty-six single-rooted teeth were divided in two groups based on the patient's age: young (ages 18-25) and old (age >or=60). Teeth were instrumented and inoculated with a standardized bacterial load and incubated for 20 days. Histological analysis wa...

Journal: :acta medica iranica 0
haghighati f arefi v

citric acid and tetracycline hcl are the most common clinical root demineralization agents used in periodontal practice. in this comparative in vitro study the effects of nd: yag laser radiation on root surface was compared to that of citric acid and tetracycline hcl using sem. a total of twenty-one freshly extracted periodontally diseased single rooted premolar teeth were root planned in vitro...

Journal: :Periodontology 2000 2004
Ilan Rotstein James H S Simon

Exposed dentinal tubules in areas of denuded cementum may serve as communication pathways between the pulp and periodontal ligament (Fig. 1). Exposure of dentinal tubules may occur due to developmental defects, disease, or periodontal procedures. In the root, dentinal tubules extend from the pulp to the dentinocemental junction (73). They run a relatively straight course and range in size from ...

2008
José Ricardo Kina Juliana Kina Eunice Fumico Umeda Kina Mônica Kina Ana Maria Pires Soubhia

This study demonstrated that a significant number of bacteria is present in the radicular dentinal tubules of periodontally diseased human teeth. Ten periodontally diseased teeth were prepared and stained by Brown and Brenn technique for histological examination. Bacteria were detected in all teeth. It is suggested that bacteria may invade dentinal tubules exposed to periodontal pocket and are ...

Journal: :Journal of endodontics 2009
Annie Shrestha Siew-Wan Fong Boo-Cheong Khoo Anil Kishen

INTRODUCTION High-intensity focused ultrasound (HIFU) produces collapsing cavitation bubbles. This study aims to investigate the efficacy of collapsing cavitation bubbles to deliver antibacterial nanoparticles into dentinal tubules to improve root canal disinfection. METHODS In stage 1, experiments were performed to characterize the efficacy of collapsing cavitation bubbles to deliver the min...

Journal: :journal of lasers in medical sciences 0
mohammad reza maleki-pour department of restorative dentistry, school of dentistry, islamic azad university, isfahan, iran reza birang torabinejad dental research center, department of periodontology, school of dentistry, isfahan university of medical sciences, isfahan, iran maryam khoshayand dentist narges naghsh torabinejad dental research center, department of periodontology, school of dentistry, isfahan university of medical sciences, isfahan, iran

introduction: dentin hypersensitivity (dh) is characterized by tooth pain arising from exposure of dental roots. in this study the efficiency of neodymium yttrium-aluminum-garnet (nd:yag) laser in association with graphite on dentinal surface changes as the alternative to the treatment of dh was evaluated. methods: sixteen noncarious human third molars were collected and sectioned into 5 parts ...

Journal: :Dental materials journal 2002
Toshiko Inoue Hidekazu Takahashi Fumio Nishimura

The purpose of this study was to investigate the effects of the location and orientation of dentinal tubules in the tooth on tensile strengths of the dentin. Dumbbell-shaped specimens of 12 groups from various locations and dentinal tubule orientations were prepared. The tensile test was performed in distilled water at a temperature of 37 degrees C. The tensile strengths of the parallel to the ...

Journal: :journal of dental research, dental clinics, dental prospects 0
mehrdad lotfi 1dmd, msc, research center for pharmaceutical nanotechnology, endodontic department, dental school, tabriz university (ms) negar moghaddam 2dmd, endodontic department, dental school, tabriz university (ms) sepideh vosoughhosseini 3dmd, msc, department of oral and maxillofacial pathology, dental school, tabriz university (ms) vahid zand 4dmd, msc, endodontic department, dental school, tabriz university (ms) mohammad ali saghiri 5kamal asgar reseach center (karc), azad university, dental branch, tehran, iran.

background and aims. the aim of the present study was to compare 1.3% sodium hypochlorite (naocl) in mtad (mixture of tetracycline isomer, acid, and detergent) for the removal of the smear layer and induction of canal erosion. materials and methods. 38 maxillary incisors were divided in three experimental groups of 10 and two positive and negative control groups of each 4 teeth, and prepared us...

2008
Miriam F. Zaccaro Scelza Jeffrey M. Coil Ana Carolina de Carvalho Maciel Lílian Rachel L. Oliveira Pantaleo Scelza

This study compared, by scanning electron microscopy (SEM), the efficacy of three solvents on the removal of filling materials from dentinal tubules during endodontic retreatment. Forty human maxillary canines with straight canals were prepared according to a crown-down technique and enlarged to a#30 apical file size, before obturation with gutta-percha and a zinc-oxide-eugenol based sealer. Th...

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