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Previous issue date: 2011-10-31 / Introduction: To determine whether a correlation between water absorption and diametral tensile strength (DTS) exists, two orthodontic adhesives - one of hydrophilic (Transbond Plus Color Change), and other of hydrophobic nature (Transbond XT) - were tested. Methods: Samples were divided into 4 groups (n = 10 each) according to the variables cement type and storage condition (Group I, XT dry; Group II, XT wet; Group III, Plus dry; and Group IV, Plus wet). After measuring and weighting, samples from groups I and III were kept dry, while those from groups II and IV were immersed in distilled water for 72 h. Then, all samples were stored at 37?C for 72 h, re-weighted and re-measured. Statistical analyses assessed significant differences among the groups. Results: Water absorption was significantly higher in group IV when compared to group II (p = 0.004). As for DTS, group IV values were significantly lower than those obtained from the other groups. A significant correlation between water absorption and diametrical tensile could not be demonstrated. Conclusion: Our results suggest that Transbond Plus Color Change samples, after immersion in distilled water, absorbs more water and has lower DTS values than those obtained from wet and dry Transbond XT samples. / Introdu??o: Este estudo foi conduzido com o objetivo de avaliar a correla??o entre absor??o de ?gua e tra??o diametral de dois cimentos resinosos, um com caracter?sticas hidrof?licas (Transbond Plus Color Change) e outro com caracter?sticas hidrof?bicas (Transbond XT). M?todos: Quarenta amostras divididas em 4 grupos (n=10), de acordo com as vari?veis tipo de cimento e meio de armazenagem (seco ou imerso em ?gua destilada). Grupo I (controle): XT seco. Grupo II: XT ?mido. Grupo III (controle): Plus seco. Grupo IV: Plus ?mido. As amostras dos grupos I e III, medidas e pesadas, foram mantidas secas. Os grupos II e IV imersos em ?gua destilada (100 ml) por 72 horas. Todas armazenadas em estufa (37oC, 72 horas), pesadas e medidas novamente. Para an?lise estat?stica foi utilizado o teste t de Student, an?lise de vari?ncia, teste de compara??es m?ltiplas de Tukey e an?lise de correla??o de Pearson. N?vel de signific?ncia m?ximo de 5% para todos os testes. Resultados: Para absor??o de ?gua o grupo IV apresentou valores significativamente superiores aos do grupo II (p=0,004). Para tra??o diametral o grupo IV apresenta valores significativamente inferiores aos outros grupos, seguido pelo grupo III. N?o houve correla??o significativa entre absor??o de ?gua e tra??o diametral. Conclus?o: Os resultados indicam que a Transbond Plus Color Change, ap?s imers?o em ?gua destilada, absorve mais ?gua e tem menor resist?ncia ? tra??o diametral do que Transbond XT imersa em ?gua destilada ou em ambiente seco.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/1146 |
| Date | 31 October 2011 |
| Creators | Woitchunas, Carlos Alexandre |
| Contributors | Mota, Eduardo Gon?alves |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Odontologia, PUCRS, BR, Faculdade de Odontologia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| 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, 500, 600, 4673435736271820140 |
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