Evaluation of Shear Bond Strength of Incremental Layer of Self-etch Self-adhesive Novel Flowable Composite after Salivary Contamination:
An In-vitro Study
Published: November 1, 2022 | DOI: https://doi.org/10.7860/JCDR/2022/57959.17071
Divya Makhijani, Sharad Kamat, Santosh Hugar, Girish Nanjannawar, Sonali Kinikar, Tanvi Kadu
1. Postgraduate Student, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India.
2. Principal and Head, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India.
3. Professor, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India.
4. Ex-Professor, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India.
5. Postgraduate Student, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India.
6. Postgraduate Student, Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharashtra, India.
Correspondence
Dr. Divya Makhijani,
Sunder Jivan APTS, Nagpur, Maharashtra, India.
E-mail: makhijani.divya@gmail.com
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.
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