Donmez, Mustafa Borga; Okutan, Yener (2022). Marginal gap and fracture resistance of implant-supported 3D-printed definitive composite crowns: an in vitro study. Journal of dentistry, 124, p. 104216. Elsevier 10.1016/j.jdent.2022.104216
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OBJECTIVES
To compare the marginal gap and fracture resistance of implant-supported 3-dimensional (3D) printed definitive composite crowns with those fabricated by using 3 different millable materials.
MATERIAL AND METHODS
A prefabricated abutment was digitized by using a laboratory scanner (E4 Lab Scanner) and a complete-coverage maxillary first premolar crown was designed (Dental Designer). Forty crowns were fabricated either by 3D printing (Saremco Print Crowntec, SP) or milling (Brilliant Crios, BC; Vita Enamic, VE; Cerasmart 270, CS) (n=10). Baseline marginal gap values were evaluated by measuring 60 predetermined points on an abutment (15 points for each side) with a stereomicroscope at ×40 magnification. Marginal gap values were reevaluated after adhesive cementation. Load-to-fracture test was performed by using a universal testing machine. Two-way analysis of variance (ANOVA) was used to evaluate the effect of material type and cementation on marginal gap values. While Tukey HSD tests were used to compare the materials' marginal gap values before and after cementation, the effect of cementation on marginal gap values within each material was analyzed by using paired samples t-tests. Fracture resistance data were analyzed by using 1-way ANOVA (α=.05).
RESULTS
Material type and cementation significantly affected marginal gap values (P<.001). Regardless of cementation, SP had the lowest marginal gap values (P<.001), while the differences among milled crowns were nonsignificant (P≥.14). Cementation significantly increased the marginal gap values (P<.001). Material type did not affect fracture resistance values (F=1.589, P=.209).
CONCLUSION
Implant-supported 3D-printed composite crowns showed higher marginal adaptation compared with the milled crowns before and after cementation. In addition, all crowns endured similar forces before fracture.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine 04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology |
UniBE Contributor: |
Dönmez, Mustafa-Borga |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1879-176X |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
11 Jul 2022 14:27 |
Last Modified: |
05 Dec 2022 16:21 |
Publisher DOI: |
10.1016/j.jdent.2022.104216 |
PubMed ID: |
35803388 |
Uncontrolled Keywords: |
3D-printing fracture resistance implant-supported crown marginal gap |
BORIS DOI: |
10.48350/171195 |
URI: |
https://boris.unibe.ch/id/eprint/171195 |
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