Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study
Several studies have reported the benefits of sonic and/or ultrasonic instrumentation for root debridement, with most of them focusing on changes in periodontal clinical parameters. The present study investigated possible alterations in the tensile bond strength of crowns cemented with zinc phosphat...
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| Format: | Article |
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Sociedade Brasileira de Pesquisa Odontológica
2008-09-01
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| Series: | Brazilian Oral Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242008000300014 |
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| author | Antonio Braulino de Melo Filho Matsuyoshi Mori Maria Aparecida Neves Jardini Karine Tenório Landim Ana Cristina de Oliveira Solis |
| author_facet | Antonio Braulino de Melo Filho Matsuyoshi Mori Maria Aparecida Neves Jardini Karine Tenório Landim Ana Cristina de Oliveira Solis |
| author_sort | Antonio Braulino de Melo Filho |
| collection | DOAJ |
| description | Several studies have reported the benefits of sonic and/or ultrasonic instrumentation for root debridement, with most of them focusing on changes in periodontal clinical parameters. The present study investigated possible alterations in the tensile bond strength of crowns cemented with zinc phosphate cement to natural teeth after ultrasonic instrumentation. Forty recently extracted intact human third molars were selected, cleaned and stored in physiologic serum at 4°C. They received standard preparations, at a 16º convergence angle, and AgPd alloy crowns. The crowns were cemented with zinc phosphate cement and then divided into four groups of 10 teeth each. Each group was then subdivided into two subgroups, with one of the subgroups being submitted to 5,000 thermal cycles ranging from 55 ± 2 to 5 ± 2°C, while the other was not. Each group was submitted to ultrasonic instrumentation for different periods of time: group 1 - 0 min (control), group 2 - 5 min, group 3 - 10 min, and group 4 - 15 min. Tensile bond strength tests were performed with an Instron testing machine (model 4310). Statistical analysis was performed using ANOVA and Tukey's test at the 5% level of significance. A significant reduction in the tensile bond strength of crowns cemented with zinc phosphate and submitted to thermal cycles was observed at 15 min (196.75 N versus 0 min = 452.01 N, 5 min = 444.23 N and 10 min = 470.85 N). Thermal cycling and ultrasonic instrumentation for 15 min caused a significant reduction in tensile bond strength (p < .05). |
| first_indexed | 2024-12-11T05:55:17Z |
| format | Article |
| id | doaj.art-3226a7b60c4d4e7eb97a9583a2dac590 |
| institution | Directory Open Access Journal |
| issn | 1806-8324 |
| language | English |
| last_indexed | 2024-12-11T05:55:17Z |
| publishDate | 2008-09-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj.art-3226a7b60c4d4e7eb97a9583a2dac5902022-12-22T01:18:41ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1806-83242008-09-0122327027410.1590/S1806-83242008000300014Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro studyAntonio Braulino de Melo FilhoMatsuyoshi MoriMaria Aparecida Neves JardiniKarine Tenório LandimAna Cristina de Oliveira SolisSeveral studies have reported the benefits of sonic and/or ultrasonic instrumentation for root debridement, with most of them focusing on changes in periodontal clinical parameters. The present study investigated possible alterations in the tensile bond strength of crowns cemented with zinc phosphate cement to natural teeth after ultrasonic instrumentation. Forty recently extracted intact human third molars were selected, cleaned and stored in physiologic serum at 4°C. They received standard preparations, at a 16º convergence angle, and AgPd alloy crowns. The crowns were cemented with zinc phosphate cement and then divided into four groups of 10 teeth each. Each group was then subdivided into two subgroups, with one of the subgroups being submitted to 5,000 thermal cycles ranging from 55 ± 2 to 5 ± 2°C, while the other was not. Each group was submitted to ultrasonic instrumentation for different periods of time: group 1 - 0 min (control), group 2 - 5 min, group 3 - 10 min, and group 4 - 15 min. Tensile bond strength tests were performed with an Instron testing machine (model 4310). Statistical analysis was performed using ANOVA and Tukey's test at the 5% level of significance. A significant reduction in the tensile bond strength of crowns cemented with zinc phosphate and submitted to thermal cycles was observed at 15 min (196.75 N versus 0 min = 452.01 N, 5 min = 444.23 N and 10 min = 470.85 N). Thermal cycling and ultrasonic instrumentation for 15 min caused a significant reduction in tensile bond strength (p < .05).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242008000300014Zinc phosphate cementTensile strengthTooth crownUltrasonic therapy |
| spellingShingle | Antonio Braulino de Melo Filho Matsuyoshi Mori Maria Aparecida Neves Jardini Karine Tenório Landim Ana Cristina de Oliveira Solis Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study Brazilian Oral Research Zinc phosphate cement Tensile strength Tooth crown Ultrasonic therapy |
| title | Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study |
| title_full | Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study |
| title_fullStr | Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study |
| title_full_unstemmed | Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study |
| title_short | Effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth. An in vitro study |
| title_sort | effect of ultrasonic instrumentation on the bond strength of crowns cemented with zinc phosphate cement to natural teeth an in vitro study |
| topic | Zinc phosphate cement Tensile strength Tooth crown Ultrasonic therapy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242008000300014 |
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