Evaluation of fracture resistance of pulpotomizedsecond primary molars restored with fiber-reinforced composite

Mehrshad Zareiyan | Roza Haghgoo | Mohamad Rezvani | Majid Mehran | Farivar Dastan | Fateme Taghizade

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=137938
Date :  2020/10/22
Publish in :    Pediatric Dental Journal

Link :  www.pdj.com
Keywords :fracture resistance- pulpotomized molars - iber-reinforced composite

Abstract :

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Objectives:Fiber reinforcement of composite restorations can help decrease the fracturerisk in restored pulpotomized teeth with severe coronal lesions.This study aimed to evaluate the fracture resistance of pulpotomized second primarymolars restored with fiber-reinforced composite (FRC).Methods:This experimental study was done on 40 extracted primary second molars in fourgroups (n¼10). The negative controls were intact untreated teeth; while, other sampleswere pulpotomized with the mesio-occlusal-distal (MOD) access cavities prepared on theirbuccal and lingual surfaces. Positive control group was left unrestored. Composite groupreceived glass ionomer on Zonalin and was restored with flowable composite and thencomposite. The FRC group received glass ionomer as the preceding group; the glass fiberwas embedded within flowable composite, and the cavity was restored with composite.The compressive forces leading to fracture were recorded in Newton. Comparisons weremade through one-way ANOVA and Tukey’s post-hoc test (a¼0.05).Results:The highest mean fracture resistance belonged to the intact teeth (604.45±59.02 N),then the FRC group (584.31±57.18 N). Unrestored teeth had the lowest fracture resistance(235.60±45.60 N); however, they were not significantly different from composite group inthis regard (P¼0.47). Although FRC group had significantly higher fracture resistance thanthe unrestored and composite group, it was not significantly different from intact teeth.Conclusions:Fiber reinforcement improved the fracture resistance of pulpotomized primarymolar with large MOD cavities.