Comparative study of flexural strength and elasticity modulus in two types of direct fiber-reinforced systems

Abstract

The objective of this study was to compare the flexural strength and elasticity modulus of two types of staple reinforcement fibers, Interlig - Angelus/glass (Londrina, PR, Brazil) and Connect - KerrLab(R)/polyethylene (MFG Co., West Collins Orange, CA, USA), which are widely used in Dentistry for chairside use, after varying the number of layers employed and submitting or not to thermocycling. This study was performed on 72 specimens, divided into 8 groups: G1 - single layer of Interlig fibers without thermocycling; G2 - double layer of Interlig fibers without thermocycling; G3 - single layer of Interlig fibers with thermocycling; and G4 - double layer of Interlig fibers with thermocycling; G5 - single layer of Connect fibers without termocycling; G6 - double layer of Connect fibers without termocycling; G7 - single layer of Connect fibers with termocycling; G8 - double layer of Connect fibers with termocycling. For each group, values for flexural strength and elasticity modulus were obtained. The polyethylene fiber employed in a double layer presented the highest flexural strength (p < 0.05), independently of thermocycling (p < 0.001), when compared to the other evaluated combinations. The polyethylene fiber, used in a single layer without thermocycling, demonstrated a significantly higher elasticity modulus, when compared to the other groups (p < 0.05). Within the limits of this study, it was concluded that the polyethylene fiber in a double layer appears to be more resistant, regardless of whether it was submitted to thermocycling or not.

Comparative Evaluation of Flexural Strength and Flexural Modulus of Different Periodontal Splint Materials: An In Vitro Study

“…The result of the present study showed that the Ribbond ® was found to have the highest flexural strength, followed by F-splint-Aid ® , ligature wire, InFibra ® , and composite block having the least flexural strength. The research carried out by Yapp and Powers in 2011, Gaspar Junior et al in 2009, and Juloski et al in 2012 showed that polyethylene fibers are more flexible than glass fibers and stainless steel wire, which is in agreement with the findings in the present study [25,29,30]. The higher flexibility of polyethylene as compared to the glass fiber and composite could be credited to its patented lock stitch pattern that avoids transfer of stress back into the reinforcement resin and distributes them into the weave [31].…”

The effect of the different restorations on fracture resistance of root-filled premolars

“…However, this procedure requires an additional step and time. This special fiber network can be made of glass, polyethylene, Kevlar, or carbon [ 12 ]. The reinforcing capacity of fibers is dependent on their orientation, on their adhesion to the resin, and on their impregnation with the resin [ 13 ].…”

Evaluation of Stress Distribution in Root Canal Treated Maxillary Incisors Treated with Different Fiber-Reinforced Composite Resins by Finite Element Analysis

“…'nın yaptıkları bir in vitro çalışmasında tek kat ve çift kat halinde uygulanan iki farklı tip (cam ve polietilen) fiberin ısıl döngüye tabi tutulup tutulmamasına göre eğilme dirençleri karşılaştırılmıştır. Çalışma sonuçlarına göre çift kat halinde uygulanan polietilen fiber, değerlendirilen diğer kombinasyonlarla karşılaştırıldığında, ısıl döngüden bağımsız olarak en yüksek eğilme direncini göstermiştir (31). Bu in vitro çalışma sonucuyla benzer olarak bu SEA çalışmasında da leno dokuma yapıda polietilen fiberin örgü yapıda cam fibere göre stresleri daha çok absorbe etme yeteneği olduğunu ve meydana gelen stresleri azattığını söyleyebiliriz.…”