نتایج جستجو برای: root dentin

تعداد نتایج: 146169  

2013
Priscilla Cardoso LAZARI Rodrigo Caldeira Nunes de OLIVEIRA Rodolfo Bruniera ANCHIETA Erika Oliveira de ALMEIDA Amilcar Chagas FREITAS JUNIOR Sidney KINA Eduardo Passos ROCHA

OBJECTIVE The aim of the present study was to analyze the influence of root canal and glass fiber post diameters on the biomechanical behavior of the dentin/cement/post interface of a root-filled tooth using 3D finite element analysis. MATERIAL AND METHODS Six models were built using micro-CT imaging data and SolidWorks 2007 software, varying the root canal (C) and the glass fiber post (P) di...

Journal: :Caries research 2008
R Walter P A Miguez R R Arnold P N R Pereira W R Duarte M Yamauchi

PURPOSE To evaluate the effects of dentin collagen modifications induced by various cross-linkers on the stability of collagen matrix and the inhibition of root caries. MATERIALS AND METHODS The following cross-linkers were tested: 5% glutaraldehyde (GA), 0.5% proanthocyanidin (PA), 0.625% genipin (GE). In the first experiment, cross-linker-treated demineralized human root dentin was digested...

2016
Eyal Rosen Igor Tsesis Shlomo Elbahary Nimrod Storzi Ilana Kolodkin-Gal

Objectives: This work assesses different methods to interfere with Enterococcus faecalis biofilms formed on human dentin slabs. Methods: First, methods are presented that select for small molecule inhibitors of biofilm targets using multi-well polystyrene biofilm plates. Next, we establish methodologies to study and interfere with biofilm formation on a medically relevant model, whereby biofilm...

Journal: :Srpski arhiv za celokupno lekarstvo 2010
Mirjana Vujasković Nevenka Teodorović

INTRODUCTION An ideal endodontic sealer should adhere firmly both to dentin and to gutta-percha. OBJECTIVE The aim of this study was to evaluate the adhesion of the root canal filling to dentin and gutta-percha using scanning electronic microscopy (SEM). METHODS The sealing ability of endodontic sealers to dentinal walls of the root canal was assessed in recently extracted human single cana...

2012
Safoora Sahebi Mohammadreza Nabavizadeh Vahid Dolatkhah Davoud Jamshidi

INTRODUCTION Some studies in dental literature have proposed that short term and long term exposure of root dentin to calcium hydroxide predisposes it to fracture. Mineral trioxide aggregate (MTA) and a recently introduced endodontic material, calcium-enriched mixture (CEM) cement may be used instead of calcium hydroxide and might have an effect on the strength of root dentin. Therefore, the ai...

Journal: :journal of dental biomaterials 0
ali reza adl department of endodontics, biomaterial research center, school of dentistry, shiraz university of medical sciences, shiraz, iran fereshte sobhnamayan department of endodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran nooshin sadat shojaee department of endodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran shahabaldin azizi dentist

statement of problem: adhesion to root canal dentin is one of the necessary characteristics of endodontic sealers. mta fillapex (angelus, londria, pr, brazil) is one of the recently introduced mta-based sealer. only a limited number of studies have evaluated the bonding of this sealer to the dentin, with conflicting results. objectives: the purpose of this study was to evaluate the bond strengt...

Journal: :Journal of dental research 1990
P Schüpbach B Guggenheim F Lutz

The histopathology of active and arrested human root caries was examined in extracted teeth by different optical methods. Significant differences were observed between the mechanisms operating on the various dental structures. Three different patterns of initial cementum and dentin lesions could be distinguished, depending on the severity of the cariogenic attack, the degree of sclerosis of the...

Journal: :American journal of dentistry 2007
Kerstin Bitter Andrej M Kielbassa

PURPOSE To review the literature on adhesive luting of fiber-reinforced composite posts (FRC) to provide evidence for the clinical procedure of restoring endodontically treated teeth using FRC posts. METHODS Data focusing on bonding behavior between root canal dentin, luting agent, and FRC post in vitro as well as in vivo performance of teeth restored with FRC posts were reported. These data ...

Journal: :Dental materials : official publication of the Academy of Dental Materials 2007
Xin Wu Anna T T Chan Ya-Ming Chen Kevin H-K Yip Roger J Smales

OBJECTIVES To investigate the effectiveness of two restorative materials for reinforcing thin-walled roots and their microtensile bond strengths to root canal dentin. METHODS Twenty-one decoronated maxillary central incisor roots were root filled and the canals enlarged to leave approximately 1.0 mm thick dentin walls. The roots were distributed randomly to three equal groups. Group 1 (contro...

2016
Sahng G. Kim

The regeneration of the pulp-dentin complex has been a great challenge to both scientists and clinicians. Previous work has shown that the presence of prior infection may influence the characteristics of tissues formed in the root canal space after regenerative endodontic treatment. The formation of ectopic tissues such as periodontal ligament, bone, and cementum has been observed in the root c...

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