10. UMTEB INTERNATIONAL CONGRESS ON VOCATIONAL and TECHNICAL SCIENCE, Online, Azerbaijan, 16 - 18 October 2020, pp.80
Dental caries is one of the most common diseases in the world and that can occur
depending on age, gender, eating habits and many other parameters . The use of dental
resin-based composites (RBC) for the treatment of dental caries has increased significantly in
recent years due to the ease of application, low cost and aesthetic appearance [2-7]. However,
the mechanical and physical properties of RBCs are still not as good as desired. Therefore,
the use of short-fiber reinforced composites (SFRC) has been also started to use to meet
clinical expectations such as high load bearing and fracture toughness [5, 8]. So,it is common
for SFRC to be used with or without RBC on anterior teeth, especially in filling large gaps,
teeth exposed to high stress, and endodontic treatments. The parameters such as the method,
curing process, adhesion between surfaces, the amount and proportions of the material used
directly affect the treatment efficiency [9, 10]. In this study, four different treatment protocols
were prepared and results were compared in order to simulate the clinical use of SFRC and
Group Ia: The hole of the mold (4 mm) was filled using SFRC (everX Posterior,GC
Dental; 2 mm) and then RBC (Filtek Ultimate,3M ESPE; 2 mm) was directly applied with
Group Ib: The hole of the mold (4 mm) was filled using and results were compared.
everX Posterior, as SFRC (2 mm) and cured then surface of the cured sample was grinded
with the abbrassive paper. Then Filtek Ultimate (3M ESPE) RBC (2 mm) was applied with
equivalent proportions and cured.
Group IIa: 3 mm of the mold was filled with SFRC (everX Posterior) and 1 mm of the
mold filled with RBC (Filtek Ultimate).
Group IIb: The 3 mm of the hole (4 mm) was filled using SFRC (everX Posterior) and
cured then surface of the cured sample was grinded with the abbrassive paper. Then
RBC(Filtek Ultimate) (1 mm) was applied and cured.
Physical and mechanical properties such as surface roughness, Vicker’s hardness,
compressive strength and flexural strenght of the samples (n=5) were examined. ISO 4049 is
used for the flexural strenght determination. It was found that while compressive strenght is
depend on the application method, bending strenght is not. Consequently, filling the most of
the cavities with SFRC and appliying a thin layer RBC on the top can expand the service life
of the restoration.