Marginal gap and fracture resistance of implant-supported 3D-printed definitive composite crowns: an in vitro study.

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)

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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