<i>In vitro</i> fracture resistance of root‐filled teeth using new‐generation dentine bonding adhesives

Hürmüzlü, Feridun; Serper, Ahmet; Siso, Şeyda Hergüner; Er, Kürşat

doi:10.1046/j.1365-2591.2003.00738.x

Cited by 27 publications

(28 citation statements)

References 11 publications

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“…The clinical outcomes of direct resin composite restorations, which represent a less invasive approach to restoring endodontic posterior teeth, are variable in the literature, ranging from catastrophic to acceptable [4][5][6]. More recently, the insertion of fiber posts within direct composite restorations has been tested with the intention of providing increased fracture resistance [7][8][9]. Indeed, within the radicular dentin, the fiber post serves as a distributor of stresses and loads applied to the composite restoration [10], providing reinforcement even in the presence of sufficient residual coronal dentin [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effects of fiber-glass-reinforced composite restorations on fracture resistance and failure mode of endodontically treated molars

Scotti

Forniglia

Tempesta

et al. 2016

Journal of Dentistry

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A B S T R A C TObjectives: The study evaluated the fracture resistance and fracture patterns of endodontically treated mandibular first molars restored with glass-fiber-reinforced direct composite restorations. Methods: In total, 60 extracted intact first molars were treated endodontically; a mesio-occluso-distal (MOD) cavity was prepared and specimens were then divided into six groups: sound teeth (G1), no restoration (G2), direct composite restoration (G3), fiber-post-supported direct composite restoration (G4), direct composite reinforced with horizontal mesio-distal glass-fibers (G5), and buccal-palatal glassfibers (G6). Specimens were subjected to 5000 thermocycles and 20,000 cycles of 45 oblique loading force at 1.3 Hz and 50 N; they were then loaded until fracture. The maximum fracture loads were recorded in Newtons (N) and data were analyzed with one-way ANOVA and post-hoc Tukey tests (p < 0.05). Fractured specimens were analyzed with a scanning electron microscope (SEM). Results: The mean static loads (in Newtons) were: G1, 831.83; G2, 282.86; G3, 364.18; G4, 502.93; G5, 499.26; and G6, 582.22. Fracture resistance did not differ among G4, G5, and G6, but was significantly higher than G3 (p = 0.001). All specimens fractured in a catastrophic way. In G6, glass fibers inducted a partial deflection of the fracture, although they were not able to stop crack propagation. Conclusions: For the direct restoration of endodontically treated molars, reinforcement of composite resins with glass-fibers or fiber posts can enhance fracture resistance. The SEM analysis showed a low ability of horizontal glass-fibers to deviate the fracture, but this effect was not sufficient to lead to more favorable fracture patterns above the cement-enamel junction (CEJ). Clinical significance: The fracture resistance of endodontically treated molars restored with direct composite restorations seems to be increased by reinforcement with fibers, even if it is insufficient to restore sound molar fracture resistance and cannot avoid vertical fractures.

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Section: Introductionmentioning

confidence: 99%

Effects of fiber-glass-reinforced composite restorations on fracture resistance and failure mode of endodontically treated molars

Scotti

Forniglia

Tempesta

et al. 2016

Journal of Dentistry

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“…The embedding material should ideally simulate the capacity of bone to absorb masticatory load and therefore withstand the load applied in mechanical testing. However there is no consensus on the material that should be used and it varies greatly amongst studies: acrylic resin 19,22,30 or polystyrene resin 20,27 and die stone. 21,31 In the present study, an oblique load (458 to the long axis of the tooth) was applied to the occlusal incline of the buccal cusp using a rounded loading tip, which contacted the enamel surface away from the restoration margin.…”

Section: Discussionmentioning

confidence: 99%

“…In previous studies, the direction of the applied load has included axial loading on both buccal and palatal cusps 16,17,32 or at 308 to the vertical on the buccal cusp incline, 27 or at the tooth-restoration interface. 15,18,22 Cavity preparations: Since the early work of Vale, 33 numerous authors have documented the weakening effect of cavity preparations on tooth strength and fracture resistance, although relatively few have investigated the effect of endodontic procedures. Reeh et al using non-destructive strain measurements, reported that endodontic access had little effect (5%) on cuspal stiffness compared with an MOD cavity preparation (63% reduction relative to intact teeth).…”

Section: Discussionmentioning

confidence: 99%

“…[18][19][20][21][22] Fibre reinforced resin composite has also been studied as a conservative restoration, but was not found to improve the fracture strength compared to conventional resin composite. 23 Different bonding systems 18 and base materials including glass ionomer cement (GIC) and composites 24 have also been investigated for their effect on fracture strength.…”

Section: Introductionmentioning

confidence: 99%

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Fracture strength and fracture patterns of root filled teeth restored with direct resin restorations

Taha

Palamara

Messer

2011

Journal of Dentistry

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“…This could be related to the phenomenon of delayed strength development of MTA, which occurs after 24 h of setting 33) . A survey of published literature showed that the reinforcing effect of AH Plus root canal sealer on fracture resistance has already been evaluated in numerous studies 5,27,34,35) . In the present study, no differences in fracture strength were found among roots fi lled with AH Plus, iRoot SP, and MTA Fillapex.…”

Section: Effect Of Root Canal Sealers On Fracture Resistance Of Rootfmentioning

confidence: 99%

Resistance to fracture of roots filled with different sealers

et al. 2012

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INTRODUCTIONRoot-fi lled teeth are more susceptible to fracture than vital teeth. Ironically, these teeth which were already compromised before root canal treatment are further weakened by the process. A few reasons contribute to the vulnerability of root-fi lled teeth, chief of which is root dentin dehydration after the endodontic procedures 1) . Other reasons that predispose root-fi lled teeth to fracture include brittleness of root-fi lled teeth because of loss of tooth structure 2,3) , excessive pressure during fi lling procedures 1,4) , and excessive widening of root canals 5) . After root canal treatment, the standard fi lling material is gutta percha. To obtain a hermetic seal, gutta percha is typically used in conjunction with root canal sealers because gutta percha is incapable of bonding to root canal walls. Root canal sealers not only fi ll the voids between gutta percha points, they also fi ll the voids between gutta percha and root canal walls 6) . Bondable root canal sealers purportedly improve the seal and fracture resistance of endodontically treated roots 7,8) . To date, confl icting results were reported from different research studies. On the one hand, one study 9) found no signifi cant differences in fracture resistance between roots fi lled with a bondable root canal fi lling system, Epiphany, and those fi lled with gutta percha and an epoxy resin-based sealer, AH 26. On the other hand, a study 10) found that the fracture resistance of roots fi lled with gutta percha and AH 26 was superior to that of roots fi lled with the Epiphany system.Recently, a new root canal sealer, iRoot SP (Innovative BioCreamix Inc, Vancouver, Canada), was introduced to the market. According to the manufacturer, iRoot SP is a convenient, pre-mixed, ready-to-use injectable white hydraulic cement paste developed for permanent root canal fi lling and sealing applications. Based on a calcium silicate composition, iRoot SP is an insoluble, radiopaque, and aluminum-free material which requires the presence of water to set and harden.Another recently introduced root canal sealer is MTA Fillapex (Angelus Solucxoes Odontologicas, Londrina, Brazil). Based on an MTA (mineral trioxide aggregate) composition, other ingredients of MTA Fillapex include resins and silica (Table 1). According to the manufacturer, it has high radiopacity, low solubility in contact with tissue fl uids, low expansion during setting, and excellent viscosity for insertion. It does not stain the tooth and promotes deposition of hard tissue at the root apex and perforation sites.The purpose of the study was to compare the fracture resistance of roots fi lled with gutta percha and sealed with one of these three root canal sealers: an epoxy-based root canal sealer AH Plus (Dentsply DeTrey, Konstanz, Germany), a calcium silicate-based root canal sealer iRoot SP, and an MTA-based root canal sealer MTA Fillapex. The null hypothesis was that root canal sealers would not infl uence the fracture resistance of root-fi lled teeth. MATERIALS AND METHODS Root canal p...

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In vitro fracture resistance of root‐filled teeth using new‐generation dentine bonding adhesives

Abstract: In this laboratory study, the type of dentine bonding agents had no influence in the fracture resistance of teeth.

Cited by 27 publications

References 11 publications

Effects of fiber-glass-reinforced composite restorations on fracture resistance and failure mode of endodontically treated molars

Effects of fiber-glass-reinforced composite restorations on fracture resistance and failure mode of endodontically treated molars

Fracture strength and fracture patterns of root filled teeth restored with direct resin restorations

Resistance to fracture of roots filled with different sealers

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