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Effect of various polymerization protocols on the cytotoxicity of conventional and self-adhesive resin-based luting cements


Oguz, Ece Irem; Hasanreisoglu, Ufuk; Uctasli, Sadullah; Özcan, Mutlu; Kiyan, Mehmet (2020). Effect of various polymerization protocols on the cytotoxicity of conventional and self-adhesive resin-based luting cements. Clinical Oral Investigations, 24(3):1161-1170.

Abstract

OBJECTIVES
This study evaluated the cytotoxicity of resin-based luting cements on fibroblast cells using different polymerization protocols.
MATERIALS AND METHODS
Two conventional dual-polymerized (RelyX ARC, VariolinkN) and two self-adhesive resin cements (RelyX Unicem, Multilink Speed) specimens were polymerized using four different polymerization protocols: (a) photo-polymerization with direct light application, (b) photo-polymerization over ceramic and (c) resin nano-ceramic discs and (d) auto-polymerization. The specimens were then assigned to four groups to test cytotoxicity at 0, 1, 2 and 7 preincubation days (n = 5). MTT test was performed using NIH/3T3 fibroblast cells. Data were analysed using three- and one-way ANOVA. Multiple comparisons were made using Bonferroni post hoc test (p < 0.05).
RESULTS
The highest cytotoxic values were recorded at day 2 for conventional resin cements and at day 0 for self-adhesive resin cements. Self-adhesive resin cements showed the most cytotoxic effect at the second day, while conventional resin cements presented immediate cytotoxicity. Auto-polymerized resin specimens and especially Multilink Speed demonstrated the most cytotoxic effect regardless of the preincubation time. Cytotoxicity of cements tested reached the lowest level at day 7. Interposition of ceramic or nano-ceramic restorative material did not significantly affect the cytotoxicity of tested luting cements (p > 0.05).
CONCLUSIONS
Cytotoxicity of dual-polymerized resin cements was material-dependent and decreased gradually up to 7 days. Photo-polymerization plays an important role in reducing the cytotoxic effects.
CLINICAL RELEVANCE
When luting ceramic or resin nano-ceramic restorations of which thickness does not exceed 2 mm, the level of cytotoxicity with the tested materials is not significant. Luting of restorative materials that do not allow for light transmission such as metal-fused porcelain, clinicians should be cautious in the use of dual-polymerized conventional resin cements as only auto-polymerization of resin cements takes place under such materials.

Abstract

OBJECTIVES
This study evaluated the cytotoxicity of resin-based luting cements on fibroblast cells using different polymerization protocols.
MATERIALS AND METHODS
Two conventional dual-polymerized (RelyX ARC, VariolinkN) and two self-adhesive resin cements (RelyX Unicem, Multilink Speed) specimens were polymerized using four different polymerization protocols: (a) photo-polymerization with direct light application, (b) photo-polymerization over ceramic and (c) resin nano-ceramic discs and (d) auto-polymerization. The specimens were then assigned to four groups to test cytotoxicity at 0, 1, 2 and 7 preincubation days (n = 5). MTT test was performed using NIH/3T3 fibroblast cells. Data were analysed using three- and one-way ANOVA. Multiple comparisons were made using Bonferroni post hoc test (p < 0.05).
RESULTS
The highest cytotoxic values were recorded at day 2 for conventional resin cements and at day 0 for self-adhesive resin cements. Self-adhesive resin cements showed the most cytotoxic effect at the second day, while conventional resin cements presented immediate cytotoxicity. Auto-polymerized resin specimens and especially Multilink Speed demonstrated the most cytotoxic effect regardless of the preincubation time. Cytotoxicity of cements tested reached the lowest level at day 7. Interposition of ceramic or nano-ceramic restorative material did not significantly affect the cytotoxicity of tested luting cements (p > 0.05).
CONCLUSIONS
Cytotoxicity of dual-polymerized resin cements was material-dependent and decreased gradually up to 7 days. Photo-polymerization plays an important role in reducing the cytotoxic effects.
CLINICAL RELEVANCE
When luting ceramic or resin nano-ceramic restorations of which thickness does not exceed 2 mm, the level of cytotoxicity with the tested materials is not significant. Luting of restorative materials that do not allow for light transmission such as metal-fused porcelain, clinicians should be cautious in the use of dual-polymerized conventional resin cements as only auto-polymerization of resin cements takes place under such materials.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic of Reconstructive Dentistry
Dewey Decimal Classification:610 Medicine & health
Scopus Subject Areas:Health Sciences > General Dentistry
Language:English
Date:March 2020
Deposited On:26 Jan 2021 13:51
Last Modified:27 Jan 2021 21:02
Publisher:Springer
ISSN:1432-6981
Additional Information:This is a post-peer-review, pre-copyedit version of an article published in Clinical Oral Investigations. The final authenticated version is available online at: https://doi.org/ 10.1007/s00784-019-02980-3 Oguz, Ece Irem; Hasanreisoglu, Ufuk; Uctasli, Sadullah; Özcan, Mutlu; Kiyan, Mehmet (2020). Effect of various polymerization protocols on the cytotoxicity of conventional and self-adhesive resin-based luting cements. Clinical Oral Investigations, 24(3):1161-1170.
OA Status:Closed
Publisher DOI:https://doi.org/10.1007/s00784-019-02980-3
PubMed ID:31327082

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