Accuracy of a new fast-setting polyether impression material
Purpose: To evaluate the dimensional accuracy of impressions made using a new fast-setting polyether material. Materials and Methods: A metallic reference model with two crown preparations, one inlay - preparation, and three stainless steel precision balls was digitized to create a digital reference...
Gespeichert in:
| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2020
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| In: |
The international journal of prosthodontics
Year: 2020, Jahrgang: 33, Heft: 4, Pages: 410-417 |
| ISSN: | 1942-4426 |
| DOI: | 10.11607/ijp.6419 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.11607/ijp.6419 Verlag, lizenzpflichtig, Volltext: http://quintpub.com/journals/ijp/abstract.php?iss2_id=1691&article_id=20463#.XyvE8DVCQ2x 
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| Verfasserangaben: | Andreas Zenthöfer, Stefan Rues, Peter Rammelsberg, Dorothee Ruckes, Thomas Stober |
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| 520 | |a Purpose: To evaluate the dimensional accuracy of impressions made using a new fast-setting polyether material. Materials and Methods: A metallic reference model with two crown preparations, one inlay - preparation, and three stainless steel precision balls was digitized to create a digital reference model. Sixteen - one-step impressions were made for each of the four study groups, differing in impression material (regular-setting - polyether [RSP] vs fast-setting polyether [FSP]) and technique (monophase vs dualphase), for a total of - 64 specimens. Plaster casts fabricated from these impressions were digitized using 3D scans. Global accuracy - was studied by evaluating distance and angle deviations between the replica and the reference model. Local - accuracy was described in terms of trueness and precision of the aligned individual abutment tooth surfaces. - Results: For all impression materials and techniques, the local accuracy at the abutment tooth level was - excellent. For surfaces prepared for crowns, mean trueness was < 10 μm, and mean precision < 12 μm. Inlay - surfaces were associated with higher inaccuracies (mean trueness < 21 μm and mean precision < 37 μm). - The greatest global inaccuracies were generally measured for the cross-arch span, with mean distance - changes between -55 μm and -94 μm. For all aspects of studied accuracy, impressions with FSP were at least - comparable to those fabricated with RSP. Conclusion: Within the limitations of this study, all tested polyether - materials would allow for clinically acceptable impression making. The new fast-setting material could be an - alternative to regular-setting polyether materials, especially for single crowns and small fixed partial dentures. | ||
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