The effect of conventional, half-digital, and full-digital fabrication techniques on the retention and apical gap of post and core restorations

Hendi, Amirreza; Moharrami, Mohammad; Siadat, Hakimeh; Hajmiragha, Habib; Alikhasi, Marzieh

doi:10.1016/j.prosdent.2018.09.014

Cited by 33 publications

(39 citation statements)

References 28 publications

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“…A recent study reported that CAD/CAM composite resin post and cores provided sufficient adaptation to the post space and were less time consuming to fabricate, although cast post and cores had a slightly better adaptation. 49 Similarly, an in vitro study 50 reported conventionally cast Co-Cr alloy to be more accurate in terms of apical gap when compared to those milled from the same alloy. The reported gap, however, was within the clinically acceptable range.…”

Section: Cad/cam Vs Conventionally Fabricated Post and Coresmentioning

confidence: 99%

“…More recently, the use of milled, 50 and 3D-printed 51 Co-Cr alloy has been reported in in vitro studies, which were compared to cast post and cores. Although many of the other materials used were described in case reports, there is no report on clinical use of CAD/CAM fabricated Co-Cr alloy, possibly due to the inherent aesthetic disadvantage of metal alloys, especially given the numerous alternatives that offer superior aesthetic properties.…”

Section: Materials Used To Fabricate Cad/cam Post and Corementioning

confidence: 99%

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Customized Post and Cores Fabricated with CAD/CAM Technology: A Literature Review

al-Qarni¹

2022

IJGM

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Post and core restorations are a widely accepted method to restore endodontically treated teeth with compromised tooth structure. The use of computerized technology to fabricate customized post and cores is a simple and quick alternative to conventional methods. A literature search was conducted, and a summary of articles describing fabrication techniques and materials used to fabricate post and cores with computer-aided design and computer-aided manufacturing (CAD/CAM) has been provided. Several techniques have been reported to restore endodontically treated teeth with CAD/CAM post and cores, including direct and indirect methods. Zirconia, composite resin, and hybrid ceramic were the most commonly reported materials. Published reports on CAD/CAM post and core are limited; however, further studies are needed to investigate the long-term outcome of this treatment.

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Section: Cad/cam Vs Conventionally Fabricated Post and Coresmentioning

confidence: 99%

Section: Materials Used To Fabricate Cad/cam Post and Corementioning

confidence: 99%

Customized Post and Cores Fabricated with CAD/CAM Technology: A Literature Review

al-Qarni¹

2022

IJGM

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“…Because a good fit of P+C has been described as a decisive factor for a high fracture resistance and retention value [16,17], this aspect is of particular importance.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow

Leven

Schmidt

Binder³

et al. 2022

Materials

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Current intraoral scanners (IOS) enable direct impression taking for computer-aided de-sign/computer-aided manufacturing (CAD/CAM) posts and cores (P+C) with subsequent milling out of monolithic materials. The aim of this in vitro study was to systematically investigate the accuracy of CAD/CAM-P+C in a fully digital workflow, considering different IOS impression methods (Primescan (PRI), Trios4 without (TRI) and with scanpost (TRI+SP)) (Part A), and CAD/CAM milling of zirconium dioxid (ZIR) and resin composite (COM)-P+C (Part B). Five human models were developed in this study. Micro-CT imaging was used as a reference (REF). For Part A, the models were scanned 12 times for each impression method. Then, IOS datasets (n = 180) were superimposed with REF, and scan accuracy was determined using 3D software (GOMInspect). For Part B, one CAD/CAM-P+C (n = 30) was milled for each model, impression method, and material. The triple-scan method was applied using an industrial scanner (ATOS) to determine the accuracy of the fit. Statistical analysis was performed using analysis of variance (ANOVA, p < 0.05). Part A showed for PRI significantly lower accuracy than TRI and TRI+SP (p < 0.05). The data of Part B revealed significantly higher accuracy for ZIR than for COM (p < 0.05). Within the limitations of this study, CAD/CAM-P+C of the ZIR can be recommended for fabrication in a fully digital workflow regarding the accuracy of fit.

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“…Although the use of fiber reinforced composite posts is increasing in contemporary dentistry 2 , cast post and cores (CPCs) remain one of the most used post type 3,4 . Metal-based CPCs exhibit great long-term clinical results and are still used successfully 5,6 because they present a better fit for root canal irregularities, avoid excessive canal preparation, and are preferred in situations involving insufficient ferrules or for supporting fixed partial dentures 7 .…”

Section: Introductionmentioning

confidence: 99%

In vitro fracture strength and modes of cast post and cores luted with self-adhesive resin-based cement

Pomini¹,

Machado

Quadros

et al. 2019

Braz. J. Oral Sci.

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Aim: Cast post and core (CPC) is the main used post type; however, the biomechanical behavior of CPCs adhesively luted to the dentin is still unclear. Therefore, we aimed to evaluate the fracture resistance (FR) and fracture modes of teeth restored with CPCs luted with zinc-phosphate (ZP) or resin-based self-adhesive (SA) cements, as well as the influence of the coronal remnant. Methods: For that, 24 human premolars were divided into four groups according to the cement (ZP or SA) and coronal remnant (with or without 2mm). FR was tested in a universal machine and data analyzed by two-way ANOVA and Tukey HSD (α=.05). Fracture modes were classified according to the degree of dental destruction. Results: The results showed that there was no difference in FR (p=.352); however, teeth without ferrule presented more irreparable fractures, specially in the ZP group. Conclusion: All in all, self-adhesion of CPCs does not enhance fracture resistance, however it reduces the number of irreparable fractures, compared to ZP cement.

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The effect of conventional, half-digital, and full-digital fabrication techniques on the retention and apical gap of post and core restorations

Cited by 33 publications

References 28 publications

Customized Post and Cores Fabricated with CAD/CAM Technology: A Literature Review

Customized Post and Cores Fabricated with CAD/CAM Technology: A Literature Review

Accuracy of Digital Impression Taking with Intraoral Scanners and Fabrication of CAD/CAM Posts and Cores in a Fully Digital Workflow

In vitro fracture strength and modes of cast post and cores luted with self-adhesive resin-based cement

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