The methods evaluation for marginal microleakage analysis in class V resin composite restorations in vitro

Autor: Laxe, Laísa Araujo Cortines
Přispěvatelé: Miranda, Mauro Sayão de, Paciornik, Sidnei, Dias, Katia Regina Hostilio Cervantes, Maurício, Marcos Henrique de Pinho, Rabello, Tiago Braga
Jazyk: portugalština
Rok vydání: 2009
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da UERJ
Universidade do Estado do Rio de Janeiro (UERJ)
instacron:UERJ
Popis: Submitted by Boris Flegr (boris@uerj.br) on 2021-01-07T15:04:04Z No. of bitstreams: 1 Tese corrigida segundo banca.pdf: 2149164 bytes, checksum: d3e22210815a75c8d162616af7c19dfa (MD5) Made available in DSpace on 2021-01-07T15:04:04Z (GMT). No. of bitstreams: 1 Tese corrigida segundo banca.pdf: 2149164 bytes, checksum: d3e22210815a75c8d162616af7c19dfa (MD5) Previous issue date: 2009-12-18 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior The aim of this study is compare the results of marginal microleakage got through different images acquiring methods and measuring methods related to silver leakage in class V resin composite restorations, in vitro. Eighteen intact human pre-molars were divided into three groups, according to the instruments for cavity preparation: 1- diamond tip, number 3100, in a turbine of high-speed; 2- carbide bur, number 330, in a turbine of high-speed; and 3- diamond tip (CVD), number 82137, coupled with an ultra-sound device. Class V cavities were prepared on buccal and lingual surfaces of the teeth, with occlusal margins in enamel and gingival margins in dentin. The cavities were treated with adhesive Solobond M (VOCO) and restored with composite Grandio (VOCO) through incremental technique. The samples were stored for 24h at 37oC in water, finished and polished with Soflex (3M) discs and stocked in water at 37oC for a week. Then, the surrounding tooth surfaces were coated with nail varnish, except in the areas adjacent to the restorations. The samples were immersed in a 50% solution of silver nitrate for 24h, exposed to photodeveloping solution for 2h, and cut in the buccal-lingual direction on restoration center. These sections were polished and the extent of microleakage was ranked using a 0-3 scale through tradicional stereomicroscope, with leds one and optical microscope. The images obtained through these latest devices had its leakage area measured with aid of AxioVision software. The χ2 McNemar-Bowker test revealed statistical agreement between tradicional stereomicroscope and with leds one (p=0,809) during semiquantitative analysis, but there were significant differences between optical microscope and stereomicroscopes (p
Databáze: OpenAIRE
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