Tooth Apex
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Healing of a tooth with an overinstrumented apex, extensive transportation and periapical lesion using a 5 mm calcium hydroxide apical plug: an 8-year follow-up report
Além do risco de extrusão periapical de material obturador pelo ápice, pode ser difícil conseguir um bom selamento apical em dentes com rizogênese incompleta ou alargamentos iatrogênicos da constrição apical. Casos assim representam um desafio durante a obturação do canal. Este caso clínico descreve a obturação de um canino superior direito com
Braz. Dent. J.. Publicado em: 2012-10
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14. Influence of anatomical barriers on maxillary incisor root resorption after orthodontic treatment with premolar extractions
INTRODUCTION: Apical root resorption is a frequent and occasionally critical problem in orthodontic patients undergoing induced tooth movement. One of the factors that might influence prognosis, especially in maxillary incisors, which most frequently present resorptions, are the so-called the anatomical barriers; that is, proximity of the buccal and palatal
Dental Press Journal of Orthodontics. Publicado em: 2012-04
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15. Cementum, apical morphology and hypercementosis: a probable adaptive response of the periodontal support tissues and potential orthodontic implications
Information about orthodontic movement of teeth with hypercementosis is scarce. As cementum deposition continues to occur, cementum is expected to change the shape of the root and apex over time, but this has not yet been demonstrated. Nor has it ever been established whether it increases or decreases the prevalence of root resorption during orthodontic trea
Dental Press Journal of Orthodontics. Publicado em: 2012-02
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16. Confiabilidade das determinaÃÃes de localizadores eletrÃnicos foraminais: estudos ex vivo e in vivo / Determination of the reliability of electronic foramen locators: ex vivo and in vivo studies
Os localizadores eletrÃnicos foraminais (LEFs) disponÃveis atualmente utilizam diversos mÃtodos de determinaÃÃo eletrÃnica da posiÃÃo foraminal, qual seja a medida entre o forame apical e uma referÃncia incisal/oclusal, definindo consequentemente o comprimento do canal radicular. Cada um desses mÃtodos procura oferecer maior precisÃo e menor sensi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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17. Influência do alargamento foraminal na anatomia apical e na qualidade de selamento após obturação / Influence of apical foramen widening on apical foramen morphology and apical sealing
Introduction: The aim of this study was to evaluate the influence of the working length and apical foramen widening on the anatomy of the apical foramen and on the sealing ability after root canal filling. Methods: Fifty-five palatal roots of maxillary molars were selected. The samples were randomly divided into three groups (n=15) according to the different
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/04/2011
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18. Review and phylogeny of Lutzsimulium (Diptera: Simuliidae)
Lutzsimulium d'Andretta Jr & Vulcano, 1947 is an enigmatic South American genus with four species: L. flavopubescens Lutz, 1910, L. hirticosta Lutz, 1909, L. pernigrum Lutz, 1910 and L. simplicicolor Lutz, 1910. It can be diagnosed by median arms of furcasternum with projections; subbasal tooth of the claw reduced; wing basal cell absent; spermatheca with ne
Zoologia (Curitiba). Publicado em: 2010-10
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19. Ex vivo analysis of apical human tooth in 3D sections using computed micro-CT / Análise ex vivo de cortes apicais de dentes humanos em 3D empregando microtomografia computadorizada
This ex vivo study aimed to investigate the apical anatomy of vital and necrotic human roots by microcomputed tomography (micro-CT). Thirty-five single or multirooted human teeth that had their roots separated totaling forty-one roots were carefully pre-selected and divided into two groups: vital pulp (VP) n = 21 and necrotic pulp (NP) n = 20. Both groups we
Publicado em: 2010
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20. Study of the discrepancy between the areas of the initial apical instrument and of the apical foramen in the maxillary incisors / Estudo da discrepância entre as áreas do instrumento apical inicial e do forame apical nos incisivos centrais superiores
The aim of this study was to study the discrepancy between the areas of initial apical instrument (IAI) and major foramen of central maxillary incisives by scanning electronic microscopy. Fifty teeth received cervical preparation with LA Axxess drills. K-files were then introduced in root canal, in gradual increase of diameter, until tactile adjustment one m
Publicado em: 2010
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21. Avaliação das foraminas de dentes ântero-superiores em ápices radiculares com e sem apicetomia / Evaluation of apical anatomy in maxillary anterior root apices with or without apicoectomy
The aim of apical surgery is to remove the root canal system ramifications, to Access to the root canal and place an apical seal. This ex vivo study evaluated the root apex topography of maxillary anterior teeth. The influence of the root end resection level to remove the acessory foramina was also assessed. Fifty maxillary anterior teeth were evaluated usin
Publicado em: 2009
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22. Evaluation of the risk of a stripping perforation with gates-glidden drills: serial versus crown-down sequences
The aim of this study was to evaluate the remaining dentine/cementum thickness using Gates-Glidden burs in serial and crown-down sequences and to observe which of the two sequences is the safest for preparing mesial roots of molars. Thirty-six left and right human mandibular first molars were selected. Standard access cavities were made and initially explore
Brazilian Oral Research. Publicado em: 2008-03
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23. Avaliação ex vivo da precisão do localizador eletrônico Root ZX II na determinação da posição do limite CDC, utilizando-se o registro 1 do visor
It is generally accepted that root canal treatment procedures should be confined within the root canal system. To achieve this objective the canal terminus must be detected accurately during canal preparation and precise control of working length during the process must be maintained. Several techniques have been used for determining the apical canal terminu
Publicado em: 2008
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24. "Análise comparativa, pelo método dos elementos finitos bidimensional, das tensões geradas nas estruturas de suporte de prótese parcial removível de extremidade livre inferior, em rebordo horizontal e descendente-ascendente" / A two-dimensional finite element analysis of the stress distribution in the supporting structures of a distal extension base removable partial denture over a horizontal and descending/ascending residual ridge.
This study is a two-dimensional finite element analysis (FEA) of the stress distributionin the supporting structures compact and cancellous bone; periodontal ligament and oral mucosa for a distal extension base removable partial denture (RPD) modeled on mandibular dental archs with two residual ridge forms: horizontal and descending-ascending. The two
Publicado em: 2005