Fracture Resistance of maxillary premolars Restored with Different Fiber-reinforced Composites: An In Vitro Study | ||||
| Egyptian Dental Journal | ||||
| Article 45, Volume 65, Issue 2 - April (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), April 2019, Page 1833-1843 PDF (342.4 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2019.72882 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Hebatallah M. Taher1; Mohamed Haridy2 | ||||
| 1Associate Professor of Conservative Dentistry, Faculty of Dentistry, Cairo University and October University for Modern Science and Art . | ||||
| 2Associate Professor of Conservative Dentistry, Faculty of Dentistry, Cairo University and British University in Egypt | ||||
| Abstract | ||||
| Objective: To evaluate the fracture resistance of maxillary premolars weakened by MOD cavities and restored with nanohybrid composite, bulk fill composite and two fiber reinforced composites. Materials and Methods: A total of 60 sound maxillary first premolars with standardized MOD cavities were used for this study, except for intact control. Specimens were randomly divided into six groups (n=10); G1: sound premolars (negative control); G2: unrestored teeth (positive control); G3: MOD cavities restored with nanohybrid composite. G4: MOD cavities restored with sonicfill bulk fill composite.; G5: MOD cavities restored with nanohybrid resin composite with glass fibers embedded into it from bucco-lingually.; G6: MOD cavities restored with short-fiber reinforced resin composite. All specimens were subjected to thermocycling between 5Cº to 55Cº in water bath for a total of 2000 cycle with 10 seconds dwell time. Then specimens were individually mounted on a computer-controlled material testing machine (Instron 3345) with a load cell of 5 kN and the maximum load to produce fracture in Newton (N) was recorded and statistical analysis was performed. Results: Kruskall-Wallis test and Bonferroni-corrected Mann-Whitney U test showed that there was a statistically significant difference between the different study groups (P=0.000). Positive control and short fiber reinforced composite groups yielded the significantly highest mean values; followed by nanohybrid resin composite, sonic fill bulk fill composite and fiber reinforced composite groups that were statistically similar. While the negative control had the significantly lowest mean value. Conclusion: The use of short fiber reinforced resin composite as restoration significantly increased the fracture strength of premolars with MOD restorations. | ||||
| Keywords | ||||
| MOD cavities, Nanohybrid composite; Bulk fill composite; fiber reinforced composite; Fracture strength | ||||
|
Statistics Article View: 375 PDF Download: 710 |
||||
