Effect of Resin Restorative Material Type and Layering Techniques on the Fracture Resistance of Maxillary Premolars
DOI:
https://doi.org/10.48047/63dzmj91Keywords:
BULK FILL, RESIN COMPOSITE, FLOWABLE COMPOSITE, LAYARING TECHNIQUE, FRACTURE RESISTANCEAbstract
Objectives: This study aimed to evaluate the fracture resistance of premolar teeth with standardized mesio occluso-distal (MOD) cavities, restored using various techniques (layering techniques and composite-resin restorations)
Materials and Methods: Seventy intact maxillary premolars with standardized MOD cavities were randomly divided into seven groups (n=10): G1 control intact teeth; G2: MOD cavities left unrestored; G3: restored using an incremental technique with nanohybrid resin composite (Neo Spectra TM ST, Dentsply Sirona); G4: restored in bulk using a flowable composite (SDR Flow+, Dentsply Sirona); G5: bulk-filled with a multihybrid composite (Tetric N Ceram, Ivoclar); G6: restored using an incremental technique with SDR Flow+ & Tetric N Ceram; and G7: restored incrementally with SDR Flow+ & Neo Spectra TM ST. After 24 hours of storage at 37°C, the specimens were tested for fracture resistance using a universal testing machine, applying force through a 4 mm
diameter steel sphere at a crosshead speed of 5 mm/min until fracture occurred. Statistical analysis was performed using the D'Agostino-Pearson test, Kruskal–Wallis test, and Mann–Whitney U tests at a 5% significance level to identify differences among groups.
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References
Garoushi S, Tanner J, Vallittu P, and Lassila L. Preliminary clinical evaluation of short fiber-reinforced composite resin in posterior
teeth: 12-months report. The Open Dentistry Journal.2012; 6: 41–45.
Bonilla E, Mardirossian G, and Caputo A. Fracture toughness of posterior resin composites. Quintessence International. 2001; 32: 206–210.
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