Investigation of Mechanical and Physical Properties of Resin-Based Composite and Short Fiber Resin Composites Used Together in Dental Restorations


Hazar A. B.

International Congress on Vocational And Technical Science (UMTEB), Nakhchivan, Azerbaycan, 16 - 18 Ekim 2020, ss.80

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Nakhchivan
  • Basıldığı Ülke: Azerbaycan
  • Sayfa Sayıları: ss.80

Özet

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 [1]. 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 RBC materials. 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 equivalent proportions. 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.