Strength of roots before and after endodontic treatment and restoration

Sornkul, Ekkasak; Stannard, Jan G.

doi:10.1016/s0099-2399(06)80845-9

Cited by 120 publications

(110 citation statements)

References 11 publications

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“…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.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

Resistance to fracture of roots filled with different sealers

et al. 2012

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“…Root canal treatment might have an effect on the resistance of bonded teeth to fracture. 22) In this sense, our experimental design more closely simulated the clinical situation and is more relevant to clinical practices. Friedman et al reported that the force required to fracture bonded roots was at the most 20% of that required for intact roots.…”

Section: ⅳ Discussionmentioning

confidence: 99%

Fracture resistance of crown-root fractured teeth repaired with dual-cured composite resin and horizontal posts

Chang

Lee

Kyung

et al. 2009

J Korean Acad Conserv Dent

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The purpose of this study was to investigate the fracture resistance of crown-root fractured teeth repaired with dual-cured composite resin and horizontal posts. 48 extracted human premolars were assigned to control group and three experimental groups. Complete crown-root fractures were experimentally induced in all control and experimental teeth. In the control group, the teeth (n=12) were bonded with resin cement and endodontically treated. Thereafter, the access cavities were sealed with dual-cured composite resin. In composite resin core -post group (n=12), the teeth were endodontically treated and access cavities were sealed with dual-cured composite resin. In addition, the fractured segments in this group were fixed using horizontal posts. In composite resin core group (n=12), the teeth were endodontically treated and the access cavities were filled with dual-cured composite resin without horizontal posts. In bonded amalgam group (n=12), the teeth were endodontically treated and the access cavities were sealed with bonded amalgam. Experimental complete crown-root fractures were induced again on repaired control and experimental teeth. The ratio of fracture resistance to original fracture resistance was analyzed with KruskalWallis test. The results showed that teeth in control and composite resin core -post group showed significantly higher resistance to re-fracture than those in amalgam core group (p < 0.05). The resistance to refracture was high in the order of composite resin -post group, control group, composite resin group and bonded amalgam group. Within the scope of this study, the use of horizontal post could be beneficial in increasing the fracture resistance of previously fractured teeth. [J Kor Acad Cons Dent 34(5): [383][384][385][386][387][388][389] 2009]

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“…A post space is prepared to gain mechanical retention of the core, meaning further removal of sound tooth substance. In the case of a post and core system, a greater degree of stress may be concentrated in the root 9,39) . Put together, these factors may adversely affect the longevity of a non-adhesively restored tooth.…”

Section: Discussionmentioning

confidence: 99%

Dentin Bond Strengths of Three Adhesive/Composite Core Systems using Different Curing Units

et al. 2008

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This study evaluated the tensile bond strengths of three adhesive/composite core materials to bovine dentin using three different curing units. Bovine dentin surfaces were ground with 600-grit SiC paper. Bonding area was demarcated with a vinyl tape (4-mm-diameter hole). Three adhesive/composite core systems -S6054 (experimental), UniFil Core, and Clearfil DC Core Automix -were used with three curing units -Curing Light XL3000 (quartz-tungsten-halogen), Hyper Lightel (high-power quartz-tungsten-halogen), and LEDemetron1 (blue light-emitting diode) -according to manufacturers' instructions. After 24 hours of storage in water at 37℃, tensile bond strengths were measured at a crosshead speed of 2 mm/min. Results were statistically analyzed with one-way ANOVA and Tukey' s HSD test (p<0.05). Highest tensile bond strength was obtained using Clearfil DC Core Automix with Hyper Lightel.

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Strength of roots before and after endodontic treatment and restoration

Cited by 120 publications

References 11 publications

Resistance to fracture of roots filled with different sealers

Resistance to fracture of roots filled with different sealers

Fracture resistance of crown-root fractured teeth repaired with dual-cured composite resin and horizontal posts

Dentin Bond Strengths of Three Adhesive/Composite Core Systems using Different Curing Units

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