Journal article
Comparative Study of the Fit Accuracy of Full-Arch Bar Frameworks Fabricated with Different Presintered Cobalt-Chromium Alloys
BioMed research international, Vol.2018(2018), pp.1-7
01/01/2018
DOI: 10.1155/2018/1962514
PMCID: PMC6098887
PMID: 30175117
Abstract
Purpose. This study was to measure the geometric discrepancies that occur during the sintering contraction of presintered Co-Cr alloys in a full-arch bar framework and to compare the variations between alloys from different manufacturers. Materials and Methods. Eighteen implant-supported full-arch bar frameworks were fabricated through a soft-machining process using presintered Co-Cr alloy blocks: Ceramill Sintron (CS), Soft Metal (SM), and Sintermetall (SML) (n=6 for each group). The sintered frameworks were digitized using a structured light scanner, and the scan images were superimposed on the reference design. The geometric discrepancies of the sintered frameworks were three-dimensionally analyzed for horizontal, angular, and internal discrepancies. Kruskal-Wallis and Mann–Whitney U tests were used to compare the discrepancies among the groups (α=.05). Results. Significant differences were found in the geometric discrepancy measurements among the groups. The CS group showed larger horizontal and angular discrepancies, followed by the SM and SML groups (P<.001). The root mean square (RMS) values for internal discrepancy were not statistically different among the groups (P=.778). Conclusion. The geometric discrepancies of full-arch bar frameworks fabricated using the soft-machining process were affected by accuracies in sintering contraction of presintered alloys.
Details
- Title: Subtitle
- Comparative Study of the Fit Accuracy of Full-Arch Bar Frameworks Fabricated with Different Presintered Cobalt-Chromium Alloys
- Creators
- Hang-Nga Mai - Kyungpook National UniversityTae-Yub Kwon - Kyungpook National UniversityMin-Ho Hong - Kyungpook National UniversityDu-Hyeong Lee - Kyungpook National University
- Contributors
- Despina Deligianni (Editor)
- Resource Type
- Journal article
- Publication Details
- BioMed research international, Vol.2018(2018), pp.1-7
- DOI
- 10.1155/2018/1962514
- PMID
- 30175117
- PMCID
- PMC6098887
- NLM abbreviation
- Biomed Res Int
- ISSN
- 2314-6133
- eISSN
- 2314-6141
- Publisher
- Hindawi
- Grant note
- NRF-2014R1A1A1006073 / Ministry of Science, ICT and Future Planning
- Language
- English
- Date published
- 01/01/2018
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984914150702771
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