Dimensional stability of a novel polyvinyl siloxane impression technique
Aim: To introduce a modification of the reline impression technique (MRIT), and compare the dimensional changes of impressions obtained by MRIT and by conventional reline impression technique (CRIT). Methods: An acrylic resin tablet was milled by a CAD-CAM system to simulate three abutments (A, B an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Campinas
2015-10-01
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| Series: | Brazilian Journal of Oral Sciences |
| Subjects: | |
| Online Access: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640906 |
| _version_ | 1818972780283035648 |
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| author | Moira Pedroso Leão Camila Paloma Pinto Ana Paula Sponchiado Bárbara Pick Ornaghi |
| author_facet | Moira Pedroso Leão Camila Paloma Pinto Ana Paula Sponchiado Bárbara Pick Ornaghi |
| author_sort | Moira Pedroso Leão |
| collection | DOAJ |
| description | Aim: To introduce a modification of the reline impression technique (MRIT), and compare the dimensional changes of impressions obtained by MRIT and by conventional reline impression technique (CRIT). Methods: An acrylic resin tablet was milled by a CAD-CAM system to simulate three abutments (A, B and C) with different distances among them. The abutments were molded using both impression techniques. For MRIT, before completing the putty silicone polymerization, the relieve procedure was made by compression and it was immediately repositioned to complete the polymerization. Impressions were stored dry at room temperature for different periods (immediately, 1 h, 2 days and 7 days). The distances were obtained by scanning. The differences between the impressions and their respective matrix reference measurements were calculated to determine the dimensional changes. Data were subjected to ANOVA and Tukey’s test (p<0.05). Results: For AB and BC distances, there was no statistically significant difference between CRIT and MRIT (p=0.0597 and p=0.2167, respectively). For AC, there was statistically significant difference between the techniques for the immediate storage time (p=0.006). In general, for CRIT the material showed expansion, while for MRIT it showed contraction. Conclusions: It was verified that the addition silicon impressions obtained by both impression techniques showed dimensional stability, except for the immediate time-point. |
| first_indexed | 2024-12-20T15:13:42Z |
| format | Article |
| id | doaj.art-64e4020d5cd44a9aba230d4b8eec4e1a |
| institution | Directory Open Access Journal |
| issn | 1677-3225 |
| language | English |
| last_indexed | 2024-12-20T15:13:42Z |
| publishDate | 2015-10-01 |
| publisher | Universidade Estadual de Campinas |
| record_format | Article |
| series | Brazilian Journal of Oral Sciences |
| spelling | doaj.art-64e4020d5cd44a9aba230d4b8eec4e1a2022-12-21T19:36:14ZengUniversidade Estadual de CampinasBrazilian Journal of Oral Sciences1677-32252015-10-0113210.20396/bjos.v13i2.8640906Dimensional stability of a novel polyvinyl siloxane impression techniqueMoira Pedroso Leão0Camila Paloma Pinto1Ana Paula Sponchiado2Bárbara Pick Ornaghi3Universidade Positivo - UPUniversidade Positivo - UPUniversidade Positivo - UPUniversidade Positivo - UPAim: To introduce a modification of the reline impression technique (MRIT), and compare the dimensional changes of impressions obtained by MRIT and by conventional reline impression technique (CRIT). Methods: An acrylic resin tablet was milled by a CAD-CAM system to simulate three abutments (A, B and C) with different distances among them. The abutments were molded using both impression techniques. For MRIT, before completing the putty silicone polymerization, the relieve procedure was made by compression and it was immediately repositioned to complete the polymerization. Impressions were stored dry at room temperature for different periods (immediately, 1 h, 2 days and 7 days). The distances were obtained by scanning. The differences between the impressions and their respective matrix reference measurements were calculated to determine the dimensional changes. Data were subjected to ANOVA and Tukey’s test (p<0.05). Results: For AB and BC distances, there was no statistically significant difference between CRIT and MRIT (p=0.0597 and p=0.2167, respectively). For AC, there was statistically significant difference between the techniques for the immediate storage time (p=0.006). In general, for CRIT the material showed expansion, while for MRIT it showed contraction. Conclusions: It was verified that the addition silicon impressions obtained by both impression techniques showed dimensional stability, except for the immediate time-point.https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640906Dimensional measurement accuracyDental impression materialsDental impression techniqueLaboratory research |
| spellingShingle | Moira Pedroso Leão Camila Paloma Pinto Ana Paula Sponchiado Bárbara Pick Ornaghi Dimensional stability of a novel polyvinyl siloxane impression technique Brazilian Journal of Oral Sciences Dimensional measurement accuracy Dental impression materials Dental impression technique Laboratory research |
| title | Dimensional stability of a novel polyvinyl siloxane impression technique |
| title_full | Dimensional stability of a novel polyvinyl siloxane impression technique |
| title_fullStr | Dimensional stability of a novel polyvinyl siloxane impression technique |
| title_full_unstemmed | Dimensional stability of a novel polyvinyl siloxane impression technique |
| title_short | Dimensional stability of a novel polyvinyl siloxane impression technique |
| title_sort | dimensional stability of a novel polyvinyl siloxane impression technique |
| topic | Dimensional measurement accuracy Dental impression materials Dental impression technique Laboratory research |
| url | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640906 |
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