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Previous issue date: 2015-03-30 / Imaging exams performed in areas with the presence of metallic materials such as dental implants can decrease the accuracy of the exams due to metallic artifacts production generated in the peri-implant region. A sample of 21 dental implants placed in 10 patients with Branemark protocol prostheses was evaluated in the periimplant area in image exams of the post-surgery control using periapical radiography (paralleling technique), panoramic radiography and cone-beam computed tomography (CBCT). The radiographic density of different areas bounded near the dental implants were calculated and compared considering their locations and the imaging exams using the software ImageJ. Regarding the different imaging exams, the CBCT showed significant differences between the measured areas (p<0.001), while in periapical (p=0.430) and panoramic (p=0.149) radiographs did not occur significant difference between the gray mean values in these areas. Comparing the areas in the three exams it was observed larger values next to the implants in all exams: CBCT (126.20 and 127.44) panoramic radiography (106.51 and 106.09) and periapical radiography (120.32). The more distant areas and the areas closest to neighboring implants had significant different values in the two reconstructed images of CBCT when compared to the panoramic and periapical radiographs. The interference of dental implants in acquiring radiographic and tomographic exams was confirmed by altered radiographic density mean values in the peri-implant area. Comparing the three exams it was noticed that the CBCT image showed the most significant interference of the dental implants. / Os exames por imagem realizados em ?reas que apresentam materiais met?licos, como implantes dent?rios, podem ter sua qualidade prejudicada devido ? produ??o de artefatos met?licos gerados na regi?o peri-implantar. Uma amostra de 21 implantes dent?rios, em 10 pacientes com pr?teses do tipo protocolo Branemark, foi avaliada com o objetivo de comparar as densidades radiogr?ficas na regi?o periimplantar em exames de imagens de controle p?s-operat?rio com radiografia periapical (t?cnica do paralelismo), radiografia panor?mica e tomografia computadorizada de feixe c?nico. Os valores m?dios de densidade em ?reas delimitadas pr?ximas aos implantes dent?rios foram calculados e comparados, de acordo com suas localiza??es, e entre os exames de imagens utilizando o programa ImageJ. Os exames de Tomografia Computadorizada de Feixe C?nico (TCFC) apresentaram diferen?as significativas entre as ?reas medidas (p<0,001), enquanto que nas radiografias periapical (p=0,430) e panor?mica (p=0,149) n?o houve diferen?a significativa entre os valores m?dios de densidade nas mesmas ?reas. Na compara??o entre as ?reas dos tr?s exames, observou-se valores maiores naquelas pr?ximas aos implantes em todos os exames: TCFC (127,88 e 120,71), panor?mica (106,51 e 106,09) e periapical (120,32). As ?reas mais distantes e pr?ximas aos implantes vizinhos mostraram valores significativamente diferentes nos dois cortes da TCFC quando comparados aos exames periapical e panor?mico. Sendo assim, foi poss?vel confirmar a interfer?ncia dos implantes dent?rios na obten??o dos exames radiogr?ficos e tomogr?ficos, pela altera??o dos valores m?dios de densidade radiogr?fica na regi?o peri-implantar. Na compara??o entre os tr?s exames de imagem investigados, verificou-se que as imagens de TCFC sofreram a maior interfer?ncia dos implantes dent?rios, quando comparadas com as imagens radiogr?ficas.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/6041 |
| Date | 30 March 2015 |
| Creators | Felix, Rafael Perdomo |
| Contributors | Rockenbach, Maria Ivete Bolzan, Shinkai, Rosemary Sadami Arai |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, Brasil, Faculdade de Odontologia |
| 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:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -8096554818733665164, 600, 600, 600, 4673435736271820140, -2070498469879244349 |
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