Fracture resistance and failure modes of CEREC endo-crowns and conventional post and core-supported CEREC crowns

Chang, Chih Hsiang; Kuo, Jau-Shing; Lin, Yang-Sung; Chang, Yen‐Hsiang

doi:10.1016/s1991-7902(09)60016-7

Cited by 116 publications

(157 citation statements)

References 25 publications

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“…In the literature, the oblique fracture strength of endocrown and conventional crowns on glass fiber post-composite core were compared, and higher fracture values were found for endocrowns (674.75 N) with respect to conventional post-core systems (469.90 N) 36) . Also, Chang et al 37) stated that leucite-reinforced glass ceramic endocrown restorations showed statistically higher fracture resistance values (1,446.68 N) than all-ceramic crowns supported by glass fiber post and composite core (1,163.30 N) for premolars. These results were attributed to the increased thicknesses of the ceramic materials and the reduced number of interfacial surfaces for endocrowns with respect to post-core crowns 36,37) .…”

Section: Discussionmentioning

confidence: 99%

“…Also, Chang et al 37) stated that leucite-reinforced glass ceramic endocrown restorations showed statistically higher fracture resistance values (1,446.68 N) than all-ceramic crowns supported by glass fiber post and composite core (1,163.30 N) for premolars. These results were attributed to the increased thicknesses of the ceramic materials and the reduced number of interfacial surfaces for endocrowns with respect to post-core crowns 36,37) . In an in-vivo study by Bindl and Mörmann 25) , it was presented that only one in 19 endocrowns failed due to recurrent caries, after a 28 months clinical follow-up.…”

Section: Discussionmentioning

confidence: 99%

“…Whereas periodontal ligament simulation was used in some literatures 33,50) , there are studies which reported that periodontal ligament is challenging in terms of thickness standardization and stability 14,35,37) . Although Marchionatti et al 33) stated that no differences were found between the groups with and without periodontal ligament for the fracture resistance of roots treated with fiber post, Soares et al 51) reported that periodontal ligament affected the fracture resistance and fracture modes by behaving as a stress absorber.…”

Section: Discussionmentioning

confidence: 99%

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Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Kanat‐Ertürk

Sarıdağ

Köseler

et al. 2018

Dental Materials Journal

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The objectives of this study were to compare the fracture strength of endocrown restorations fabricated with different preparation depth and various CAD/CAM ceramics, and to assess the fracture types. Endodontically treated 100 extracted human permanent maxillary centrals were divided into two preparation depth groups as short (S: 3-mm-deep) and long (L: 6-mm-deep), then five ceramic subgroups, namely: feldspathic-ceramic (Vita Mark II-VM2), lithium-disilicate glass-ceramic (IPS e.max CAD-E.max), resin-ceramic (LAVA Ultimate-LU), polymer infiltrated ceramic (Vita Enamic-VE) and monoblock zirconia (inCoris TZI-TZI) (n=10/subgroup). The endocrowns were fabricated by CAD/CAM and were cemented with resin cement (RelyX U200). The teeth were thermally cycled (5,000cycles) and fracture tests were performed at 45º angle to the teeth. The data were statistically analyzed (Kruskal-Wallis, Mann Whitney U), failure modes were evaluated with stereomicroscopy. Zirconia group provided the statistically highest fracture strength, but also exhibited non-repairable failures. Preparation depth has an effect on the fracture strength only for feldspathic ceramic.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Kanat‐Ertürk

Sarıdağ

Köseler

et al. 2018

Dental Materials Journal

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“…This approach has shown promising results and comparable short-term survival when compared to post, core, and crown systems. [18][19][20][21][22] A wide collection of ceramic materials has been available for CAD/CAM technology, ranging from relatively weak feldspathic ceramic and leucite glass ceramic to high-strength lithium disilicate glass ceramic and zirconium oxide. 23 Most recently, a resin nanoceramic has been introduced for permanent CAD/CAM fabricated restorations.…”

Section: Introductionmentioning

confidence: 99%

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

El-Damanhoury¹,

Haj-Ali²,

Platt³

2015

Operative Dentistry

174

169

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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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“…1,5,13 Minimal invaziv preparasyon sayesinde kron hazırlığı sırasında kaybedilen diş dokusu korunurken, 11,14 adeziv bağlanmada rol oynayan diş yüzey alanının artması sağlanır. 5 Ayrıca pulpa odasından sağ-lanan makromekanik destek sonucunda restorasyonun retansiyonu ve stabilitesi olumlu etkilenirken, 14 post yuvasının hazırlığı sırasında oluşabilecek olası riskler önlenir.…”

Section: Discussionunclassified

Aşiri Kron Harabi̇yeti̇ Olan Kanal Tedavi̇li̇ Di̇şlerde Cad/Cam İle Endokron Uygulamalari: Olgu Seri̇si̇

Ertürk¹

2015

Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi

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Fracture resistance and failure modes of CEREC endo-crowns and conventional post and core-supported CEREC crowns

Cited by 116 publications

References 25 publications

Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

Fracture strengths of endocrown restorations fabricated with different preparation depths and CAD/CAM materials

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

Aşiri Kron Harabi̇yeti̇ Olan Kanal Tedavi̇li̇ Di̇şlerde Cad/Cam İle Endokron Uygulamalari: Olgu Seri̇si̇

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