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Previous issue date: 2015-01-01 / The purpose of this study was to evaluate through radiographic and microscopic analysis the efficiency of the filling techniques by vertical hidraulic compression after the root canal mechanical instrumentation in vitro as well to evaluate the marginal apical leakage through macroscopic and microscopic analysis. Thirty human mandibular molars were used , they were divided on three groups, these were subdivided on six subgroups with five specimens each, come down to 106 root canals filled. Initially, the teeth were instrumented with Profile system series 29 and filled with two ways: single accessory cone or single cone associated with gutta-percha secundary cone, with Fill Canal sealer or Sealer 26. Completed the filling, the teeth were coated with araldit and finger -nail polish except for the apical 2 mm and dried for 3 hours, thep radiographs were taken of the teeth in orto and disto-radiai directions. Next, the coronal seal was carried out with composite resin photopolymerized and with their process of making impermeable. Teeth of positive controls were used without araldit and finger-nail polish whereas the negative controls were used with total coat of araldit and finger-nail polish. The specimens were placed in 2% Methylene Blue dye for 24 hours and thermocycled for 7 days. Afterwards, sections were made of each tooth at mesial and distal roat, after this the teeth were radiographed at buccol?ngual direction for a macroscopic analysis and at buccolingual and mesiodistal directions for assessment of the marginal apical leakage. Cross sections were made 3 mm to 3mm since the tooth apice. The sections obtained for each group were observed with a stereomicroscope to evaluate the quality of the root canal filling and the marginal apical leakage. The results showed that: In the four techniques the marginal dye leakage was present in the apical third; in all groups the quality of the root canal filling in the radiography was better at mesial root canal and the single cone technique showed inefficient when only a single distal root canal was present. In the radiographic evaluation the best quality of the root canal filling was observed in the 1A group (single accessory cone + FiIl Canal), as in the mesial root as in the distal root wich Shcwed twe root canals: when the distaI root had only one canal. the best result was showed by 28 group (single accessory cone associated with secundary cone + Fill Canal) In the macroscopic analysis of longitudinal !eaKage (outside surface). less leakage was showed as In the mesial root as in the distal root in the negative control group (3) followed 2A group (single accessory cone + Sealer 26). When the microscopic analysis of tranversal leakage of both roots (inside surface) was carried out. the groups that showed less dye leakage were the negative control (38) followed the 28 group (single acessory cone associated with secundary cone + Sealer 26). The homogeneity o filling was best noted in the 1 A group (.single accessoty cone + Fill Canal). The groups that showed less dye penetration in the tranversal leakage (total area) were negative control (3B) and 2B / O objetivo do presente trabalho foi avaliar atrav?s de an?lise radiogr?fica e microsc?pica, a efici?ncia da t?cnica de obtura??o pela compress?o hidr?ulica vertical, ap?s instrumenta??o com limas acionadas a motor, "in vitro", como tamb?m, avaliar a infiltra??o marginnal apical por meio de an?lise macrosc?pica e microsc?pica. Foram utilizados trinta molares humanos inferiores, divididos em tr?s grupos, os quais foram subdivididos em seis subgrupos, com cinco esp?cimes cada, totalizando 106 canais radiculares obturados. Inicialmente, os dentes foram instrumentado com o sistema Profile s?rie 29 e obturados de duas formas: cone de g?ta-percha acess?rio ?nico ou cone ?nico associado a cones de guta-percha secund?rios, utilizando-se os cimentos Fill Canal ou Sealer 26. Efetuadas as obtura??es, os dentes foram radiografados no sentido orto e disto-radial, impermeabilizados com araldite e esmalte de unhas, exceto nos 2 mm apicais e secos durante 3 horas. A seguir foi realizado o selamento coronano com resina fotopolimeriz?vel e sua impermeabiliza??o. Como controle positivo foram utilizados dentes sem impermeabiliza??o e, como controle negativo foram usados dentes com total impermeabiliza??o. Os esp?cimes foram imersos no corante azul de metileno a 2%, durante 24 horas e, em seguida, foi realizada a ciclagem t?rmica, por 7 dias. Prosseguindo-se, as ra?zes mesiais e distais foram seccionadas e radiografadas no sentido vest?bulo/lingual, e analisadas, macroscopicamente, no sentido vest?bulo/lingual e m?sio-distal quanto ? infiltra??o marginal apical. Ent?o, cada raiz foi cortada transversalmente, de 3 em 3 mm, a partir do ?pice radicular, e analisou-se, em estereomicrosc?pio, a qualidade da obtura??o e a infiltra??o marginal apical. Com base nos resultados, p?de-se concluir que: as quatro t?cnicas testadas n?o foram capazes de impedir a Infiltra??o marginal do corante no ter?o apical: em todos os grupos, a qualidade da obtura??o radiograficamente, foi melhor nos canais mesiais; e a utiliza??o da t?cnica do cone ?nico quando havia apenas um canal distal mostrou-se? ineficiente. Radiograficamente, a melhor qualidade de obtura??o foi observada no grupo 1 A (cone acess?rio ?nico + Fill canal). tanto na raiz mesial quanto na raiz distal que apresentava dois canais, quando a raiz distal possu?a apenas um canal, o melhor resultado foi mostrado pelo grupo 2B (cone acess?rio ?nico associado a cones secund?rios + Fill canal). Quanto ? an?lise macrosc?pica da infiltra??o longitudinal (superf?cie externa), os grupos que produziram menor infiltra??o de corante, tanto na raiz mesial quanto na raiz distal, foram o grupo controle negativo (3B), seguido do grupo 2A (cone acess?rio ?nico + Sealer 26). Por sua vez, na an?lise microsc?pica da infiltra??o transversal (superf?cie interna) de ambas ra?zes, os grupos que produziram menor infiltra??o de corante foram o controle negativo (3B), seguido do grupo 2B (cone acess?rio ?nico associado a cones secund?rios + Sealer 26). Quanto ? homogeinidade do material obturador, o melhor resultado foi observado no grupo 1A (Cone acess?rio ?nico + Fill canal). Finalmente, quanto ? infiltra??o transversal (?rea total) os grupos que produziram menor de penetra??o de corante foram controle negativo (3B) e o 2B
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18528 |
| Date | 01 January 2015 |
| Creators | Marinho, Jovanka ?ltima |
| Contributors | CPF:15075079415, http://lattes.cnpq.br/7060394224697599, Carvalho, Rejane Andrade de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Cl?nicas Odontol?gicas, UFRN, BR, Cl?nicas Odontol?gicas |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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