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Effect of periodontal therapies on indirect restoration: a scanning electron microscopic analysis
Soares, Priscilla Barbosa Ferreira; Magalhães, Denildo; Fernandes Neto, Alfredo Júlio; Castro, Carolina Guimarães; Santos Filho, Paulo César Freitas; Soares, Carlos José.
  • Soares, Priscilla Barbosa Ferreira; Federal University of Uberlândia. Dental School. Department of Periodontology and Implantology. Uberlândia. BR
  • Magalhães, Denildo; Federal University of Uberlândia. Dental School. Department of Periodontology and Implantology. Uberlândia. BR
  • Fernandes Neto, Alfredo Júlio; Federal University of Uberlândia. Dental School. Department of Occlusion, Fixed Prosthodontics and Dental Materials. Uberlândia. BR
  • Castro, Carolina Guimarães; Federal University of Uberlândia. Dental School. Department of Operative Dentistry and Dental Materials. Uberlândia. BR
  • Santos Filho, Paulo César Freitas; Federal University of Uberlândia. Dental School. Department of Operative Dentistry and Dental Materials. Uberlândia. BR
  • Soares, Carlos José; Federal University of Uberlândia. Dental School. Department of Operative Dentistry and Dental Materials. Uberlândia. BR
Braz. dent. j ; 21(2): 130-136, 2010. tab, ilus
Article in English | LILACS | ID: lil-551933
ABSTRACT
The aim of this study was to evaluate the influence of different periodontal therapies on the integrity of indirect restorations by scanning electron microscopy (SEM). Sixty single-rooted bovine teeth were selected and randomly assigned to 12 groups. Inlay cavities were prepared in the cervical region on the center of the cementoenamel junction, and were restored with laboratory processed resin and luted with a resin cement. Twelve periodontal therapies were used (n= 5) C control (no treatment); MS manual scaling with Gracey curettes; US ultrasonic scaling; PP prophylaxis with prophylactic paste; PS prophylaxis with pumice-stone; SBJ sodium bicarbonate jet; MS/PP; MS/PS; MS/SBJ; US/PP; US/PS; US/SBJ. The specimens were prepared and analyzed by SEM. SEM micrographs at ×100 to ×1000 magnification were obtained from the surface of the laboratory resin and the interface of the indirect restorations. The images were evaluated by 3 skillful, calibrated, blinded observers as to the presence of grooves, microcavities and fracture of margins. The results showed that PS produced groves on restoration surface. MS and US produced groves and marginal fractures on the restorations. SBJ resulted in resin cement degradation. These results suggest that except for PS, all procedures had deleterious effects on the marginal integrity of indirect restorations.
RESUMO
O objetivo desse estudo foi avaliar a influência de diferentes terapias periodontais na integridade de restaurações indiretas por meio de microscopia eletrônica de varredura (MEV). Sessenta raízes bovinas foram selecionadas e aleatoriamente divididas em 12 grupos. Preparos cavitários inlay foram realizados na região cervical central da junção cemento-esmalte e restaurados com resina laboratorial cimentado com cimento resinoso. Doze terapias periodontais foram usadas (n=5) C-sem tratamento (controle); MS-raspagem manual com cureta Gracey; US-raspagem com ultra-som; PP- profilaxia com pasta profilática; PS-profilaxia com pedra pomes; SBJ-jato de bicarbonato; MS/PP; MS/PS; MS/SBJ; US/PP; US/PS; US/SBJ. As amostras foram preparados e submetidas a MEV. Imagens, de ×100 a ×1000, da superfície da resina laboratorial e da interface das restaurações indiretas foram obtidas. As imagens foram avaliadas em procedimento cego por 3 observadores habilitados previamente calibrados seguindo os seguintes critérios ranhuras, microcavidades e fratura de margem. Os resultados mostraram que a profilaxia com pedra pomes promoveu ranhuras na superfície das restaurações. Raspagem manual e ultrasônica promoveram ranhuras e fratura de margem das restaurações. Jato de bicarbonato resultou em degradação de cimento resinoso. Os resultados sugeriram que, exceto a profilaxia com pasta profilática, todos os procedimentos resultaram em efeitos deletérios na integridade da margem das restaurações indiretas.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Dental Scaling / Dental Marginal Adaptation / Tooth Cervix / Resin Cements / Inlays Type of study: Practice guideline Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2010 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Uberlândia/BR

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Full text: Available Index: LILACS (Americas) Main subject: Dental Scaling / Dental Marginal Adaptation / Tooth Cervix / Resin Cements / Inlays Type of study: Practice guideline Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2010 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Uberlândia/BR