Evaluation of Shear Bond Strength of Incremental Layer of Self-etch Self-adhesive Novel Flowable Composite after Salivary Contamination: An In-vitro Study

Autor: Divya Makhijani, Sharad Kamat, Santosh Hugar, Girish Nanjannawar, Sonali Kinikar, Tanvi Kadu
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Journal of Clinical and Diagnostic Research, Vol 16, Iss 11, Pp ZC14-ZC19 (2022)
Druh dokumentu: article
ISSN: 2249-782X
0973-709X
DOI: 10.7860/JCDR/2022/57959.17071
Popis: Introduction: Contamination of composite restoration during incremental placement leads to decrease in the incremental bond strength. Adhesive application on freshly contaminated resin surface increases the bond strength but is a complex and time-consuming procedure. Recently composite systems combining etchant, bonding agent and flowable composite into a single component have been introduced to simplify bonding and save time. In this study incremental layer shear bond strength is utilised to assess bond stability at resin-resin interface after salivary contamination. Aim: To evaluate shear bond strength of incremental layer of self-etch self-adhesive novel flowable composite after salivary contamination. Materials and Methods: The present in-vitro experimental study included 55 acrylic resin cylinders (2×2.5 cm) with square shaped cavity (5×5 mm, thickness 2 mm) restored with DMGTM Constic flowable composite that were randomly divided into five groups with eleven specimens per group. Group I: No salivary contamination, Group II: Salivary contamination followed by air drying, Group III: Salivary contamination followed by rinsing and air drying. Group II and III were subdivided into subgroup a: application and brushing of 0.5 mm of Constic followed by light curing and filling of rest of mold by Constic, subgroup b: direct application of 2 mm of Constic. Shear bond strength between increments of composite was determined by universal testing machine. Data were analysed using One-way ANOVA test and Independent t-test. Level of significance was kept at 5%. Results: Incremental shear bond strength (MPa) was highest for group I (12.09±1.99) followed by group IIIa (10.21±3.49), group IIa (10.08±3.21), group IIb (7.59±2.31) and lowest for group IIIb (7.35±3.06). Conclusion: Active application of self-etch self-adhesive flowable composite successfully restores the incremental shear bond strength after salivary contamination.
Databáze: Directory of Open Access Journals
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