head JofIMAB
Journal of IMAB - Annual Proceeding (Scientific Papers)
Publisher: Peytchinski Publishing Ltd.
ISSN: 1312-773X (Online)
Issue: 2019, vol. 25, issue1
Subject Area: Dental Medicine
DOI: 10.5272/jimab.2019251.2426
Published online: 19 March 2019

Original article

J of IMAB. 2019 Jan-Mar;25(1):2426-2432
Janet Kirilova1ORCID logo, Snezhanka Topalova-Pirinska1ORCID logo, Dimitar Kirov2ORCID logo Corresponding Autoremail,
1) Department of Conservative Dentistry, Faculty of Dental Medicine, Medical University, Sofia, Bulgaria.
2) Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University, Sofia, Bulgaria.

Aim of the study: The aim is to evaluate and compare marginal microleakage of class II resin composite restorations using a flowable composite and resin-modified glass-ionomer cement as intermediate layers, and to assess whether a difference in the thickness, consistency, and position of these layers would influence microleakage.
Material and Methods: Forty-two extracted intacted molars were divided into six groups. Class II cavities in medial and distal parts were prepared. Cavities in Group А were lined with a flowable composite resin; Group В had no lining; in Group С1, the axial wall was covered with a 1.5 mm resin-modified glass-ionomer cement (RMGIC) layer; in Group С2, axial and gingival walls were covered with a 2.5 mm RMGIC layer; in Group С3, the axial wall was covered with a 1 mm RMGIC layer; and in Group С4, axial and gingival walls were covered with a 1 mm RMGIC layer.
Results: No significant microleakage differences existed between groups A and B and the experimental group C3. In group C3, a low-viscosity RMGIC was applied only on the axial dentin wall of the cavity. Such difference, however, exists in comparison of group C1 or C2 with each of the groups A or B (p < 0.0001). The difference between groups C4 and A (p < 0.0001) was also significant.
Conclusion: The least microleakage along the gingival walls of the model cavities with RMGIC occurs when a 1-mm layer of resin-modified glass-ionomer with fluid consistency covers only the axial wall of the proximal cavity.

Keywords: closed-sandwich technique, flowable resin composite, marginal microleakage, resin-modified glass-ionomer,

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Please cite this article as: Kirilova J, Topalova-Pirinska S, Kirov D. Evaluation of impact of lining application techniques on marginal microleakage in resin-modified glass ionomer cement in class II composite restorations: An in vitro study. J of IMAB. 2019 Jan-Mar;25(1):2426-2432.
DOI: 10.5272/jimab.2019251.2426

Corresponding AutorCorrespondence to: Dimitar Kirov, assistant Professor, DDS, PhD, Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University Sofia; 1, St. Georgi Sofyiski Str., 1431 Sofia, Bulgaria; E-mail: dimiterkirov@gmail.com

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Received: 29 October 2018
Published online: 19 March 2019

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