The effect of ferrule on the fracture mode of endodontically treated canines restored with fibre posts and metal-ceramic or all-ceramic crowns

Fragou, Theodora; Tortopidis, Dimitrios; Kontonasaki, Eleana; Evangelinaki, Evangelia; Ioannidis, Konstantinos; Petridis, Haralampos; Koidis, Petros

doi:10.1016/j.jdent.2012.01.002

Cited by 26 publications

(20 citation statements)

References 53 publications

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“…The similar values of flexural strength between ceramic and composite and the ferrule effect provided by 2 mm of dentin may account for the present findings. The importance of preserving a minimum amount (2 mm) of coronal dentin height after preparation on the fracture resistance and prevention of root fracture on ETT has been reported in various studies [43,44]. It has been reported that when the ferrule effect is present, stresses are redistributed in the outer surface regions of the coronal third of the root, thus a possible fracture in this area can be repairable.…”

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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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%

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

et al. 2013

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“…Restorations prepared with a 2 mm ferrule demonstrated a significantly higher fracture resistance [17][18][19] . However, another study reported that the presence of a ferrule did not enhance fracture resistance 20) .…”

Section: Introductionmentioning

confidence: 99%

Fracture resistance of endodontically treated teeth using fiber post with an elastic modulus similar to dentin

et al. 2013

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This study investigated the effect of fiber reinforced composite resin (FRC) post lengths, ferrule, and full coverage metal crown on fracture resistance of endodontically treated teeth (ETT) using an experimental FRC post with the similar elastic modulus of dentin (11.5 GPa). ETT was restored according to 1 of 7 combinations of FRC post length (10, 5, 2.5, 0 mm), ferrule (0, 2 mm), and with/ without metal crown (n=6). An oblique compressive load was applied on the restored teeth using a universal testing machine. Fracture loads were evaluated with 1-way ANOVA and Tukey HSD test (p<0.05). Compared with tooth preparation only, the fracture loads of ETT restored with composite resin and different post lengths were not significantly different. The group with the ferrule with metal crown showed significantly greater fracture resistance than the others.

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“…6 Failure of post and core systems may be due to different mechanical behaviors relative to tooth structure in response to intraoral cyclic stresses. 7 This failure can be classified as repairable failure (favorable fracture) or nonrepairable failure (catastrophic fracture) that requires extraction of the tooth and subsequent prosthetic replacement. 8,9 With the increasing popularity of adhesive dentistry, a shift in treatment decisions toward more conservative modalities has been observed, and the need for conventional post and cores has become less clear.…”

Section: Introductionmentioning

confidence: 99%

Fracture Resistance and Microleakage of Endocrowns Utilizing Three CAD-CAM Blocks

El-Damanhoury¹,

Haj-Ali²,

Platt³

2015

Operative Dentistry

150

140

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Fracture resistance and mode of failure of CAD/CAM-fabricated monoblock endocrowns varies widely between materials. Clinicians should be cautious with material selection for endocrown restorations. SUMMARYThis study assessed marginal leakage and fracture resistance of computer-aided design/ computer-aided manufacturing (CAD/CAM) fabricated ceramic crowns with intracoronal extensions into the pulp chambers of endodontically treated teeth (endocrowns) using either feldspathic porcelain (CEREC Blocks [CB], Sirona Dental Systems GmbH, Bensheim, Germany), lithium disilicate (e.max [EX], Ivoclar Vivadent, Schaan, Liechtenstein), or resin nanoceramic (Lava Ultimate [LU], 3M ESPE, St Paul, MN, USA).). Thirty extracted human permanent maxillary molars were endodontically treated. Standardized preparations were done with 2-mm intracoronal extensions of the endocrowns into the pulp chamber. Teeth were divided into three groups (n=10); each group was restored with standardized CAD/CAM fabricated endocrowns using one of the three tested materials. After cementation with resin cement, specimens were stored in distilled water at 378C for one week, subjected to thermocycling, and immersed in a 5% methylene-blue dye solution for 24 hours. A compressive load was applied at 35 degrees to long axis of the teeth using a universal testing machine until failure. Failure load was recorded, and specimens were examined under a stereomicroscope for modes of failure and microleakage. Results were analyzed using one-way analysis of variance and Bonferroni post hoc multiple comparison tests (a=0.05). LU showed significantly (p,0.05) higher fracture resistance and more favorable fracture mode (ie, fracture of the endocrown without fracture of tooth) as well as higher dye penetration than CB and EX. In conclusion, although using resin

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The effect of ferrule on the fracture mode of endodontically treated canines restored with fibre posts and metal-ceramic or all-ceramic crowns

Cited by 26 publications

References 53 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

Fracture resistance of endodontically treated teeth using fiber post with an elastic modulus similar to dentin

Fracture Resistance and Microleakage of Endocrowns Utilizing Three CAD-CAM Blocks

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