Evaluation of fracture resistance of endodontically treated teeth restored with composite resin along with fibre insertion in different positions in vitro

Abstract

This study was carried out to compare the different techniques of placement of polyethylene fibre (Ribbond) on reinforcement of endodontically treated teeth with MOD cavities in vitro. Forty extracted human premolars were randomly assigned to four groups (n = 10). Teeth in Groups I-IV received root canal treatment and a MOD cavity preparation, with gingival cavosurface margin 1.5 mm in coronal to cementoenamel junction. Group I served as no fibre group, Group II as occlusal fibre group, Group III as base fibre group and Group IV as dual-fibre group (occlusal and base both). Subsequent to restoring with composite resin and thermocycling, a vertical compressive force was applied at a cross-head speed of 0.5 mm min(-1) using universal testing machine until fracture. Data were analysed using one-way analysis of variance and Tukey's post hoc tests. Fracture resistance was significantly highest in dual-fibre group (P < 0.001) as compared with other groups. The highest favourable fracture rate was observed in the base fibre group (70%). This study concluded that the use of polyethylene fibre inserted over or under the restoration significantly increased the fracture strength of the root canal-treated teeth and maximum fracture resistance was observed when cavity was restored using dual-fibre technique.

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

“…Root-filled teeth are exposed to heavy masticatory loading forces. However, there is no consensus about the best restoration type of root-filled posterior teeth [ 3 – 7 ]. Treatment options to reinforce the residual tooth structure include composites, fiber reinforced composites, glass ionomer cement, and, if required, post and core restoration and crowns (full metal or porcelain-fused to metal crowns) [ 5 , 8 – 10 ].…”

“…The use of fiber-inserted composite restorations with different positions has been investigated with the goal of increasing the fracture strength of endodontically treated teeth [ 5 , 7 ]. Belli et al [ 2 ] reported that the use of polyethylene fibers under the composite restoration increases the fracture resistance of root canal filled teeth with mesio-occluso-distal (MOD) preparation.…”

Effect of Application of the Fiber Network in Different Positions into the Composite Resin Material on Fracture Resistance of the Restorations

“…1 Direnci artan restorasyonlarla birlikte, destek oldukları diş dokularının desteğinin de arttığı göz önünde bulundurularak, kompozit reçinelerde meydana gelen bu başarısızlıkların azaltılması için, restorasyonlar ile birlikte fiber ağların kullanılması tavsiye edilmektedir. [4][5][6][7][8]20,22,23 Örneklerin standart hâle getirilmesini mümkün kılmak, yani deneylerde standardizasyonu sağlamak için, kompozit reçine ve fiber ağ uygulamalarının, diş sert dokularının desteği olmaksızın model kalıpları üzerinde kavite ölçülerine uygun olacak şekilde hazırlanması planlanmıştır. 24 Bu sayede, farklı şekillerde ve konfigürasyonlarda yerleştirilmiş fiber ağların, kompozitin basınç kuvvet lerine dayanımına etkilerinin hiçbir ilave parametre olmaksızın, net bir şekilde değerlendirilmesi amaçlanmıştır.…”

“…Fiber ağlar ile desteklenen ya da desteklenmeyen kompozit restorasyonların uygulandığı dişlerin, bu uygulama sonrası basınç kuvvetlerine karşı direncini inceleyen birçok çalışma yapılmıştır. [16][17][18][19][20]23,[25][26][27][28][29] Bunların yanı sıra fiber ağlar ile desteklenen kompozit reçinelerin bükme dirençlerini inceleyen çalışmalar da bulunmaktadır. 30,31 Ancak, yapılan çalışmalar incelendiğinde, kompozit reçineler içine, fiber ağların farklı şekillerde yerleştirilmesi sonrasında, diş dokuları olmaksızın sadece restorasyonların basınç kuvvetlerine karşı yapısal dirençlerini inceleyen herhangi bir çalışmaya rastlanmamıştır.…”

Influence of glass fiber posts and class III direct restorations on the resistance of anterior teeth

“…It is also known that the clinical applicability of GFP is directly related to the reconstruction of the dental element lost (MAKADE et al, 2011;AMBICA et al, 2013;WANDSCHER et al, 2014;REZAEI et al, 2015;RAHMAN et al, 2016). Thus, an intraradicular post should be selected with caution, verifying the amount of remaining tooth structure, root canal anatomy, post length and diameter, as well as the physical properties and modulus of elasticity (ALOMARI et al, 2011;HATTA et al, 2011;LE BELL-RÖNNLÖF et al, 2011).…”