Fracture strength and survival rate of endodontically treated maxillary incisors with approximal cavities after restoration with different post and core systems: an in-vitro study

Heydecke, Guido; Butz, Frank; Strub, Jörg Rudolf

doi:10.1016/s0300-5712(01)00038-0

Cited by 208 publications

(192 citation statements)

References 31 publications

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“…When the ferrule is absent, occlusal forces must be supported by a post that may [10,35,45]. In the present study, each tooth was prepared with a severe loss of coronal tooth structure preserving 2 mm of ferrule effect; the area of load application has also been widely described as one of the paramount factors to achieve reliable laboratory results [33,46,47]. The position of loading site seems to influence the results on failure mode, particularly in relation to the position of the post.…”

Section: Discussionmentioning

confidence: 99%

“…The position of loading site seems to influence the results on failure mode, particularly in relation to the position of the post. It is important to know that anterior teeth are responsible for tearing and functional guidance [47]. It has been well documented that fracture resistance of teeth depends on the angle of applied load, since axial forces are less detrimental than oblique forces [27].…”

Section: Discussionmentioning

confidence: 99%

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Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

et al. 2013

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Objectives This study aims to evaluate the fracture resistance of endodontically treated anterior teeth restored with crowns made of composite or ceramic and retained without the use of a post (endocrowns) or with posts of 5 mm (short) and 10 mm in length (long). Material and methods Forty-eight intact maxillary incisors were selected for the study. After endodontic treatment, the crowns were sectioned 2 mm coronally to the cementoenamel junction provided with a ferrule of 2 mm. The roots were randomly divided into six groups (n=8) according to the post length and type of coronary restoration. The crowns were fabricated with the chairside economical restoration of esthetic ceramics system. Group 1 was restored with a 10-mm glass fiber post, composite core, and a full-coverage ceramic crown (LPCer); group 2, with a 5-mm glass fiber post, composite core, and a full-coverage ceramic crown (SPCer); group 3, with a 10-mm glass fiber post, composite core, and a fullcoverage composite crown (LPCpr); group 4, with a 5-mm glass fiber post, composite core, and a full-coverage composite crown (SPCpr); and groups 5 (EndoCer) and 6 (EndoCpr) were restored with ceramic and composite endocrowns, respectively. The teeth were then thermomechanically loaded in a chewing machine. After fatigue, the specimens were loaded to fracture. Data were analyzed with ANOVA and chi-square test. Mode of failure was defined as repairable or non-repairable. Results Presence of post, post length, and crown material had no significant effect on the fracture resistance. Groups restored with endocrowns presented a higher number of repairable fractures in respect to the other groups. Conclusions Presence of a post had no effect on the restorations' fracture strength. Clinical relevance Although this in vitro study has some limitations in respect to its clinical relevance, the restoration of largely destroyed anterior teeth with the use of an endocrown or a short glass fiber post might have advantages over a large glass fiber post.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

et al. 2013

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“…This was done with the view that a vertical force applied parallel to the long axis of a tooth produced more uniform stress distributions [19][20][21] . However, it has been reported that applying a force at different angles to the long axis of a tooth is more likely to simulate occlusal loading in clinical conditions 22) .…”

Section: Standardization Of Experimental Teeth and Experimental Methomentioning

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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“…Morgano SM, Heydeche G, Mentin AG quoted custom-fabricated, cast post and cores are still regarded as the established technique or gold standard for restoring extensively damaged teeth. [10][11][12] The presence of a split for the post system reduces insertion and cementation stresses for this post system. The split may act as a vent for release of hydrostatic pressure during cementation of the post into the canal and minimizes stresses during cementation.…”

Section: Discussionmentioning

confidence: 99%

Split Cast Metal Post and Core

Chopra¹,

Singh²,

Nehete³

2012

JOFR

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The best plan for success is to begin with the end in mind. It generally is agreed that the successful treatment of a badly broken down tooth with pulpal disease depends not only good endodontic therapy, but also on good prosthetic reconstruction of the tooth after endodontic therapy. The primary purpose of the post is to retain a core that can be used to retain definitive prostheses. A post and core help prevent coronal fractures when the remaining coronal structure is very thin after tooth preparation. When a substantial amount of coronal structure is lost a cast post and core is indicated. In this clinical report the root canal treated left mandibular first molar is restored with split cast metal post and core design using the direct technique for the fabrication of the post and core pattern using the autopolymerizing acrylic resin material and then further casted in the laboratory using the base metal alloy.

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Fracture strength and survival rate of endodontically treated maxillary incisors with approximal cavities after restoration with different post and core systems: an in-vitro study

Cited by 208 publications

References 31 publications

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

Adhesive restoration of anterior endodontically treated teeth: influence of post length on fracture strength

Resistance to fracture of roots filled with different sealers

Split Cast Metal Post and Core

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