Abstract
The aim of this study was to evaluate the correlation between the percent of inorganic filler by weight (wt. %) and by volume (vol. %) of 11 flowable resin composites (FRCs) and their mechanical properties. To establish the correlation, the quantity of inorganic filler was determined by combustion and shape/size analyzed by SEM images. The compressive strength (CS), flexural strength (FS), and flexural modulus (FM) were determined. The CS values were between 182.87-310.38 MPa, the FS values ranged between 59.59 and 96.95 MPa, and the FM values were between 2.34 and 6.23 GPa. The percentage of inorganic filler registered values situated between 52.25 and 69.64 wt. % and 35.35 and 53.50 vol. %. There was a very good correlation between CS, FS, and FM vs. the inorganic filler by wt. % and vol. %. (R2 = 0.8899–0.9483). The highest regression was obtained for the FM values vs. vol. %. SEM images of the tested FRCs showed hybrid inorganic filler for Filtek Supreme XT (A3) and StarFlow (A2) and a homogeneous type of inorganic filler for the other investigated materials. All of the FS values were above 50 MPa, the ISO 4049/2019 limit for FRCs.
Highlights
Flowable resin composites (FRCs) have been popular since 1995 because of their light cure and low viscosity
The flexural strength (FS), and flexural modulus (FM) tests were determined on parallelepipedic samples (n = 8) obtained in a Teflon mold with an internal dimension of 2 mm ×
The combustion analysis that was conducted showed that the inorganic filler fraction ranged between 52.25 and 69.64 wt. % and 35.35 and 53.50 vol % (Figure 2)
Summary
Flowable resin composites (FRCs) have been popular since 1995 because of their light cure and low viscosity. FRCs contain the same size of inorganic filler with conventional dental resin composites (DRCs) but a reduced content of inorganic filler [3,4] and a greater percent of diluent monomer [4]. Due to their low viscosity, FRCs have advantages such as easier handling properties during manipulation, better adaptation to the tooth surface, and higher flexibility [3]. FRCs can be placed in layers of minimum thickness to improve or eliminate air inclusion or entrapment, a important property Due to their high flexibility, there is a low probability that they will be displaced in stress concentration areas [1]. Similar to conventional types of DRCs, the quantity, type, size of the inorganic filler [7], and the silanization of the inorganic filler significantly influence
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
