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1.
RSBO (Impr.) ; 5(3): 33-37, dez. 2008. graf, ilus
Article in Portuguese | LILACS | ID: lil-498994

ABSTRACT

Introdução e objetivo:: O objetivo deste estudo foi avaliar a infiltração marginal, através da passagem de íons níquel, em cinco tipos de materiais utilizados na clínica de Endodontia como seladores temporários: Coltosol, Tempore plus® (DFL), Cimento de Zinco® (Lee Smith), Vitro-Fill® (DFL) e New Bond®(Technew). Material e métodos: Neste estudo foram usados 56 dentes unirradiculares, conservados em solução de timol 0,1%. Os espécimes foram divididos em: grupo I – Coltosol®; grupo II – Tempore plus®; grupo III – Cimento de Zinco®; grupo IV – Vitro-Fill®; grupo V – New Bond®. Uma bolinha de algodão impregnada com solução de dimetilglioxima a 1% foi colocada na câmara pulpar, e o selamento das cavidades de acesso foi realizado com os materiais a serem testados. Os dentes foram então imersos em solução de sulfato de níquel a 5% a 37°C por 7 dias. A área infiltrada foi medida em mm2 com o auxílio do software ImageTool. Resultados: Os grupos I, II e V apresentaram valores de infiltração significativamente menores que os grupos III e IV. No entanto não houve diferença estatística entre os grupos III e IV e entre os grupos I, II e V. Conclusão: Os grupos I, II e V (Coltosol®, Tempore plus® e New Bond®) demonstraram os melhores resultados, embora todos os materiais tenham permitido percolação do corante utilizado.


Introduction and objecttiivvee:: The aim of this study was to evaluate microleakage, through the crossing of íons nickel, in five types of materials used in the clinic of Endodontics, as temporary endodontics restorations: Coltosol®; Tempore plus® (DFL); Cimento de Zinco® (Lee Smith); Vitro-Fill® (DFL); New Bond® (Technew). Material and methods: In this study 56 uniradicular teeth had been used conserved in solution of timol 0,1%. The specimens had been divided in: group I – Coltosol®; group II – Tempore plus®; group III – Cimento de Zinco®; group IV – Vitro-Fill®; group V – New Bond®. A cotton pellet moistened with solution of 1% dimethylglyoxime was put into the pulp chamber and the sealing of the access cavities was made with the materials to be tested.The specimens were then immersed in 5% NiSO4 for 7 days. The infiltrated area was measured in mm2 with aid of ImageTool software. Results: Groups I, II and V had presented significantly lesser values of infiltration than groups III and IV. However, there wasn’t statistics difference between groups III and IV and among groups I, II and V. Conclusion: The groups I, II e V (Coltosol®,Tempore plus® and New Bond®) showed the best results, although every restoration had allowed dye leakage.

2.
J Endod ; 34(4): 490-4, 2008 Apr.
Article in English | MEDLINE | ID: mdl-18358905

ABSTRACT

This article reports a case of periradicular surgery in which biomaterials, such as mineral trioxide aggregate (MTA), human lyophilized bone, and calcium sulfate, were used. A 21-year-old female patient was referred to our endodontic clinic as a result of recurrent episodes of acute exacerbation of a chronic process involving the maxillary left lateral incisor. There was complete destruction of the buccal bone plate at the apical third, leaving this portion of the root exposed to the oral cavity. After conventional root canal therapy carried out under special tooth isolation conditions, apicoectomy was performed, and a root-end cavity was prepared and restored with MTA as a retrofilling material. Because of the exposure of the root-end resection to the mouth, osteoinductive and osteoconductive materials (human lyophilized bone and calcium sulfate, and calcium sulfate alone, respectively) were used, with the goals of modeling the lost bone structure, preventing invasion of the oral epithelium, and avoiding the occurrence of secondary infection. Two years after the periradicular surgery, there were no clinical or radiographic signs suggestive of treatment failure, but instead the patient's follow-up has shown that the case management has been successful as indicated by lesion regression and periodontal repair. On the basis of the review of literature and the clinical-radiographic outcomes hereby presented, it might be concluded that (1) large bone destructions caused by periradicular lesions might and should be filled with recognizably effective bone-replacing materials during regenerative tissue process. MTA, human lyophilized bone, and calcium sulfate seemed to have an important role in alveolar bone induction, remodeling, and repair. (2) Because of its characteristics of promoting excellent marginal sealing and stimulating osteoblastic adherence to the retrofilling surface, MTA has been considered as the retrofilling material of choice.


Subject(s)
Alveolar Process/surgery , Bone Substitutes , Periapical Diseases/surgery , Retrograde Obturation , Root Canal Filling Materials , Adult , Aluminum Compounds , Alveolar Process/injuries , Apicoectomy , Bone Matrix/transplantation , Bone Regeneration , Calcium Compounds , Calcium Sulfate , Chronic Disease , Drug Combinations , Female , Humans , Oxides , Rubber Dams , Silicates
3.
Braz Dent J ; 17(1): 75-8, 2006.
Article in English | MEDLINE | ID: mdl-16721471

ABSTRACT

This paper reports the case of a maxillary left first molar that presented three root canals in the mesiobuccal root. Root canal therapy and case management are described. Features like wide crown access, adequate illumination and use of exploring files where important for successful completion of the endodontic treatment.


Subject(s)
Dental Pulp Cavity/surgery , Molar/surgery , Root Canal Therapy/methods , Tooth Root/anatomy & histology , Adolescent , Dental Pulp Cavity/anatomy & histology , Humans , Male , Molar/anatomy & histology
4.
Braz. dent. j ; 17(1): 75-78, 2006. ilus
Article in English | LILACS | ID: lil-430139

ABSTRACT

Este artigo relata o caso clínico de um primeiro molar superior esquerdo que apresentava um terceiro canal na raiz mésio-vestibular. O tratamento endodôntico e o manejo do caso são descritos. Fatores como amplo acesso coronário diferenciado, iluminação adequada, além do uso de instrumentos exploradores foram essenciais para o sucesso do tratamento endodôntico.


Subject(s)
Adolescent , Humans , Male , Dental Pulp Cavity/surgery , Molar/surgery , Root Canal Therapy/methods , Tooth Root/anatomy & histology , Dental Pulp Cavity/anatomy & histology , Molar/anatomy & histology
5.
JBE, J. Bras. Endod ; 4(13): 166-168, abr.-jun. 2003. ilus
Article in Portuguese | BBO - Dentistry | ID: biblio-851818

ABSTRACT

Devido à sua grande importância, diversos métodos para avaliar a eficácia das técnicas de instrumetação têm sido desenvolvidos. Dentre eles, podemos citar a obtenção de imagens de cortes transversais por intermédio de microscópios ópticos. O objetivo deste estudo foi descrever uma nova metodologia capaz de permitir a avaliação das modificações ocorridas após a realização do preparo químico-mecânico, em diferentes níveis. Uma vez que este método não necessita de tecnologia avançada, tampouco de um extenso e dispendioso uso de equipamentos e materiais, apresenta-se como de grande valia para a avaliação de uma determinada técnica de instrumentação

6.
Rev. bras. odontol ; 60(1): 14-17, jan.-fev. 2003. ilus, tab
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-345040

ABSTRACT

A limpeza do sistema de canais radiculares assume especial relevância no sucesso do tratamento endodôntico. O objetivo deste trabalho foi avaliar histologicamente a capacidade das técnicas step-back, movimentos contínuos de rotaçäo alternada (MRA) e do sistema Quantec de promover a limpeza do terço apical de canais radiculares. Os resultados demonstraram que näo houve diferença estatisticamente significante entre as técnicas testadas, sendo que, na maioria das vezes, os canais ainda apresentavam remanescentes teciduais, mormente em áreas de variaçöes da anatomia interna


Subject(s)
Humans , Dental Pulp Cavity/anatomy & histology , Disinfection/methods , Chemical Phenomena , Root Canal Preparation , Molar , Root Canal Irrigants
7.
J Endod ; 28(6): 457-60, 2002 Jun.
Article in English | MEDLINE | ID: mdl-12067129

ABSTRACT

The purpose of this prospective study was to evaluate the incidence of postoperative pain after intracanal procedures based on an antimicrobial strategy. Data were examined from 627 teeth that had necrotic pulps or required retreatment. Information was obtained for each patient treated with regard to presence of preoperative pain. Occurrence of periradicular bone destruction detected by radiographs was also recorded. The operators consisted of undergraduate students, who were in their first year of clinical training. Root canals were instrumented and then medicated with a calcium hydroxide/camphorated paramonochlorophenol paste. No systemic medication was prescribed. Approximately 1 week after the initial appointment, patients were asked about the occurrence of postoperative pain and the level of discomfort was rated as no pain, mild pain, moderate pain, or severe pain. Data were statistically analyzed using the Chi-square test. Mild pain occurred in 10% of the cases, moderate in 3.3%, and severe (flare-up) in 1.9%. Postoperative pain was significantly associated with the treatment of previously symptomatic teeth without periradicular lesions (p < 0.01). No other correlations were detected between the occurrence of postoperative discomfort and other clinical conditions. There was also no difference regarding the incidence of postoperative pain between treatment and retreatment (p > 0.01). The intracanal procedures used in this study to control root canal infections showed a small incidence of postoperative pain, particularly flare-ups, even performed by inexperienced undergraduate dental students.


Subject(s)
Anti-Infective Agents, Local/therapeutic use , Camphor/therapeutic use , Chlorophenols/therapeutic use , Pain, Postoperative/prevention & control , Root Canal Irrigants/therapeutic use , Root Canal Therapy/methods , Adolescent , Adult , Aged , Calcium Hydroxide/therapeutic use , Dental Pulp Necrosis/therapy , Drug Combinations , Humans , Middle Aged , Prospective Studies , Retreatment
8.
J. endod ; 27(11): 673-5, Nov. 2001. tab
Article in Portuguese | BBO - Dentistry | ID: biblio-851328

ABSTRACT

This study evaluated the ability of three materials-a resinous root canal sealer (Sealer 26) prepared in a thick consistence, a reinforced zinc oxide-eugenol cement (IRM), and a glass-ionomer cement (Fuji IX)-in preventing bacterial leakage. Retrofilled teeth were mounted in an apparatus and then challenged by human saliva. The number of days required for the bacteria from saliva to penetrate the rrot-end filling materials was determined. Evaluation was conducted for 60 days. Leakage was observed in all teeth of the Fuji IX group, and in 95 percent (19 of 20 specimens) of the teeth retrofilled with IRM. Sixty-five percent (13 of 20 teeth) of the teeth retrofilled with Sealer 26 showed leakage. No difference was detected between Fuji IX and IRM (p > 0.05). However Sealer 26 was significantly more effective in preventing bacterial leakage when compared with other materials tested (p < 0.05)


Subject(s)
Dental Leakage/prevention & control , Dental Materials/analysis , Root Canal Obturation
9.
Pesqui. odontol. bras ; 14(3): 209-12, jul.-set. 2000. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-271805

ABSTRACT

Nosso objetivo foi detectar Treponema denticola em casos de abscesso perirradicular agudo. O DNA extraído das amostras de pus foi examinado pelo método da "Polymerase Chain Reaction" direcionada para o gene do RNAr (fraçäo 16S). A amplificaçäo usando o "primer" da espécie Treponema denticola permitiu detectá-la em 5 dos 6 casos de abscessos examinados. Apenas uma banda de tamanho esperado foi observada para as amostras positivas para esta bactéria, o que foi confirmado pela comparaçäo com o DNA de referência do Treponema denticola (controle positivo). Até o momento, este é o primeiro relato da presença desta espiroqueta, considerada um importante patógeno periodontal em infecçöes endodônticas. Os resultados sugerem que Treponema denticola também pode ser um importante patógeno endodôntico


Subject(s)
Periapical Abscess , Polymerase Chain Reaction , Treponema
10.
JBE, J. Bras. Endo/Pério ; 1(2): 60-64, jul./set. 2000. tab, graf
Article in Portuguese | BBO - Dentistry | ID: biblio-851782

ABSTRACT

O objetivo deste trabalho in vitro foi quantificar os detritos extruídos apicalmente após instrumentação de canais com 3 técnicas. Sessenta incisivos laterais superiores foram divididos em 4 grupos e preparados pelas seguintes técnicas: técnica dos movimentos contínuos de rotação alternada (MRA) usando limas Flex-R; MRA com limas Onyx-R; sistema Pow-R, usando limas níquel-titâneo acionadas a motor; e técnica Step-Back usando Onyx-R com movimentos de limagem. Os detritos extruídos apicalmente foram coletados em filtros de papel adaptados em dispositivos individuais. Os resultados demonstraram que todas as técnicas permitiram a extrusão de detritos via forame apical. A extrusão apical de detritos durante a instrumentação com a técnica Step-Back usando movimentos de limagem foi significamente maior quando comparada com as outras técnicas testadas(p<0,05). Não houve diferença estatisticamente significante em relação à quantidade de detritos extruídos após instrumentação com as demais técnicas


Subject(s)
Humans , Methods , In Vitro Techniques
11.
Rev. bras. odontol ; 57(1): 10-1, jan.-fev. 2000. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-262407

ABSTRACT

Os autores relatam um caso clínico em que, por falta de conhecimento da Displasia Cementária Periapical (DCP), uma lesäo tumoral benigna que pode simular radiograficamente uma periapicopatia crônica, o paciente sofreu três tratamentos endodônticos desnecessários em dentes que apresentavam normalidade pulpar. É enfatizada a importância do correto estabelecimento do diagnóstico, evitando, assim, que a DCP seja confundida com as lesöes perirradiculares


Subject(s)
Humans , Adult , Cementoma/diagnosis , Cementoma/therapy , Cementoma , Cementoma/pathology , Periapical Diseases/diagnosis , Mandibular Neoplasms/diagnosis
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