EDJ

FRACTURE RESISTANCE OF MESIO-OCCLUSO-DISTAL CAVITIES IN MAXILLARY PREMOLARS RESTORED WITH NANOHYBRID COMPOSITE OR BULK FILL COMPOSITE WITH AND WITHOUT FIBER REINFORCED BULK FILL BASE: IN VITRO STUDY

Alaa Fathi Abdel-Salam, Mohamed Fouad Haridy And Mohamed Riad Farid,

ABSTRACT
This Study Was Conducted To Evaluate The Fracture Resistance Of Premolars Restored With Nanohybrid Composite Vs Bulk Fill RBC ?BFC ?. 40 Sound Premolars Were Divided Into Four Groups (n=10). Group 1: Sound Teeth ?positive Control?, Group 2: Prepared Teeth With MOD Cavity Preparations ?negative Control?, Group 3: Premolars With MOD Cavity Preparation Restored Incrementally With Nanohybrid RBC (Grandio?, VOCO, Germany). Group 4: Premolars With MOD Cavity Preparation Restored By Bulk Fill RBC (x-tra Fil?, VOCO, GERMANY). Load Was Applied On Specimens Using Universal Testing Machine With Crosshead Speed 1 Mm/minute Till Fracture. The Outcome Is The Load At Which The Specimen Was Fractured In Newton. Sound Teeth (1336.03�105.48) Showed Highest Fracture Resistance (N), Followed By Nanohybrid RBC (1053.8�114.99) And BFC (1028.72�94.68) With An Insignificant Difference Between Them; Followed By Negative Control (611.55�93.39) At �0.001.

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