Academic Journal
The effect of multiple firings on the dimensional accuracy of monolithic multilayered zirconia crowns manufactured with different shades: An in vitro study.
| Τίτλος: | The effect of multiple firings on the dimensional accuracy of monolithic multilayered zirconia crowns manufactured with different shades: An in vitro study. |
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| Συγγραφείς: | Spiteri, Maxiline, Trang Tran, Thi Ngoc, Attard, Nikolai, Tezulas, Emre |
| Πηγή: | International Journal of Computerized Dentistry; 2026, Vol. 29 Issue 2, p1-38, 38p |
| Θεματικοί όροι: | Dental crowns, Heat treatment, Prosthodontics, Laboratory techniques, Pigments, Statistical accuracy |
| Περίληψη: | Aim: To evaluate the effect of multiple firings and shading on the dimensional accuracy of monolithic multilayered zirconia crowns. Materials and Methods: Forty-five monolithic multilayered zirconia crowns (Cercon HT ML, Dentsply Sirona) were milled in three shades (A1, A2, A4; n=15 each) from a prepared typodont tooth design. After an initial reference scan of the intaglio surface using an intraoral scanner (Primescan, Dentsply Sirona), the crowns were subjected to six firing cycles. The intaglio surface was scanned after the second, fourth, and sixth cycles to record dimensional changes. Dimensional accuracy was quantified using root mean square (RMS) values, and the uniformity of change was quantified with standard deviation (SD) values using the Geomagic Control X software v24.2.0 (Stockholm, Sweden). Data were analysed using a two-way mixed ANOVA and Simple Main Effects Analysis. Results: Repeated firings had a substantial impact on dimensional accuracy (p<0.01), exhibiting a V-shaped pattern. Initially, there was an improvement in fit, followed by subsequent distortion. Although the overall shade effect was not statistically significant (p=0.630), a simple main effects analysis revealed shade-dependent outcomes. Darker shades (A2, A4) demonstrated significant non-linear fluctuations (p<0.05), while shade A1 remained stable (p=0.126). Conclusion: Repeated firings and darker shades increase the material's sensitivity to thermal treatments, causing statistically significant dimensional changes. However, these dimensional fluctuations remain clinically negligible. Clinicians can safely perform multiple corrective firings on these restorations, regardless of shade, without compromising their final fit. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Computerized Dentistry is the property of Quintessence Publishing Company Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Βάση Δεδομένων: | Biomedical Index |
| FullText | Text: Availability: 0 |
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| Header | DbId: edm DbLabel: Biomedical Index An: 195513569 RelevancyScore: 1121 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 1121.07458496094 |
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| Items | – Name: Title Label: Title Group: Ti Data: The effect of multiple firings on the dimensional accuracy of monolithic multilayered zirconia crowns manufactured with different shades: An in vitro study. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Spiteri%2C+Maxiline%22">Spiteri, Maxiline</searchLink><br /><searchLink fieldCode="AR" term="%22Trang+Tran%2C+Thi+Ngoc%22">Trang Tran, Thi Ngoc</searchLink><br /><searchLink fieldCode="AR" term="%22Attard%2C+Nikolai%22">Attard, Nikolai</searchLink><br /><searchLink fieldCode="AR" term="%22Tezulas%2C+Emre%22">Tezulas, Emre</searchLink> – Name: TitleSource Label: Source Group: Src Data: International Journal of Computerized Dentistry; 2026, Vol. 29 Issue 2, p1-38, 38p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Dental+crowns%22">Dental crowns</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Prosthodontics%22">Prosthodontics</searchLink><br /><searchLink fieldCode="DE" term="%22Laboratory+techniques%22">Laboratory techniques</searchLink><br /><searchLink fieldCode="DE" term="%22Pigments%22">Pigments</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+accuracy%22">Statistical accuracy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Aim: To evaluate the effect of multiple firings and shading on the dimensional accuracy of monolithic multilayered zirconia crowns. Materials and Methods: Forty-five monolithic multilayered zirconia crowns (Cercon HT ML, Dentsply Sirona) were milled in three shades (A1, A2, A4; n=15 each) from a prepared typodont tooth design. After an initial reference scan of the intaglio surface using an intraoral scanner (Primescan, Dentsply Sirona), the crowns were subjected to six firing cycles. The intaglio surface was scanned after the second, fourth, and sixth cycles to record dimensional changes. Dimensional accuracy was quantified using root mean square (RMS) values, and the uniformity of change was quantified with standard deviation (SD) values using the Geomagic Control X software v24.2.0 (Stockholm, Sweden). Data were analysed using a two-way mixed ANOVA and Simple Main Effects Analysis. Results: Repeated firings had a substantial impact on dimensional accuracy (p<0.01), exhibiting a V-shaped pattern. Initially, there was an improvement in fit, followed by subsequent distortion. Although the overall shade effect was not statistically significant (p=0.630), a simple main effects analysis revealed shade-dependent outcomes. Darker shades (A2, A4) demonstrated significant non-linear fluctuations (p<0.05), while shade A1 remained stable (p=0.126). Conclusion: Repeated firings and darker shades increase the material's sensitivity to thermal treatments, causing statistically significant dimensional changes. However, these dimensional fluctuations remain clinically negligible. Clinicians can safely perform multiple corrective firings on these restorations, regardless of shade, without compromising their final fit. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of International Journal of Computerized Dentistry is the property of Quintessence Publishing Company Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3290/j.ijcd.b7047011 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 38 StartPage: 1 Subjects: – SubjectFull: Dental crowns Type: general – SubjectFull: Heat treatment Type: general – SubjectFull: Prosthodontics Type: general – SubjectFull: Laboratory techniques Type: general – SubjectFull: Pigments Type: general – SubjectFull: Statistical accuracy Type: general Titles: – TitleFull: The effect of multiple firings on the dimensional accuracy of monolithic multilayered zirconia crowns manufactured with different shades: An in vitro study. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Spiteri, Maxiline – PersonEntity: Name: NameFull: Trang Tran, Thi Ngoc – PersonEntity: Name: NameFull: Attard, Nikolai – PersonEntity: Name: NameFull: Tezulas, Emre IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: 2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 14634201 Numbering: – Type: volume Value: 29 – Type: issue Value: 2 Titles: – TitleFull: International Journal of Computerized Dentistry Type: main |
| ResultId | 1 |