Affiliation:
1. Department of Conservative Dentistry and Endodontics, Al-Badar Rural Dental College and Hospital, Kalaburgi, Karnataka, India
Abstract
Abstract
Background:
Composites with 0.2% chitosan nanoparticles (CSN) are used recently; however, this combination needs to be studied in different cavity designs.
Aims:
The aim of the study was to compare the fracture resistance of maxillary premolars with different cavity geometries restored with different types of composite resins incorporated with 0.2% CSN.
Methods:
About 130 extracted human single-rooted maxillary premolars were embedded in acrylic molds 2 mm below cementoenamel junction, divided into five groups for cavity preparations of standardized dimensions. Group 1: (control) intact teeth (n = 10), Group 2: Class I cavities (n = 40), Group 3: Class II mesio-occlusal (MO) (n = 40), Group 4: Class II mesio-occluso-distal (MOD) (n = 40). Groups 2, 3, and 4 were subdivided into four subgroups for composite restoration; A: Neo spectra ST-Universal (NST); B: Tetric N-Ceram Bulk-fill (TNC); C: NST + CSN; and D: TNC + CSN and tested for fracture resistance using universal testing machine.
Statistical Analysis:
One-way analysis of variance and post hoc Tukey’s tests were used for data analysis (P ≤ 0.05).
Results:
In all groups, the highest fracture resistance was found in MOD cavities, followed by MO and least in Class I cavities. Subgroup D (TNC with CSN) showed the highest fracture resistance in all groups (P ≤ 0.05).
Conclusion:
Tetric N-Ceramic bulk fill with 0.25% CSN showed high fracture resistance in cavities with different geometries.