Evaluation of marginal and internal adaptation of hybrid and nanoceramic systems with microcomputed tomography: An in vitro study

Yildirim, Guler; Uzun, İsmail; Keleş, Ali

doi:10.1016/j.prosdent.2016.11.005

Cited by 53 publications

(61 citation statements)

References 28 publications

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“…The present results were in agreement with those of Yildirim et al, (31) who concluded that the adaptation values of Vita Suprinity were significantly lower than those of the IPS e.max CAD crown restorations. Similarly they were in favour with those of Mously et al, (32) who compared and evaluated the marginal and internal adaptation of lithium disilicate with different spacer thickness settings (30µm, 60 µm and 100 µm).…”

Section: Marginal and Internal Fitsupporting

confidence: 93%

Evaluation of Fracture Resistance and Fit Accuracy of Three Types of Cad/Cam Fabricated Crowns Using Cone Beam Computerized Tomography

Moaty

Azer

2018

Egyptian Dental Journal

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Aim:The aim of this study was to evaluate the internal and marginal fit accuracy using cone beam computerized tomography as an innovative nondestructive method and to assess the fracture resistance of the recently introduced zirconia reinforced lithium silicate glass ceramic in comparison to lithium disilicate and monolithic zirconia. Materials and Methods:Three types of CAD/ CAM ceramic blocks were used; zirconia reinforced lithium silicate glass ceramics (Vita Suprinity), lithium disilicate glass ceramic (IPS e.max CAD) and partially sintered translucent zirconia (In-Coris TZI). A ceramic master die was fabricated and scanned using the Cerec Omnicam to produce a total number of 30 crowns, which were divided into 3 groups (n = 10) according to the ceramic material used . Group I: Vita Suprinity. Group II: IPS e.max CAD and Group III: In-Coris TZI. A highly computerized cone beam tomography (CBCT) was used to evaluate the fit accuracy of the crowns on the master die. For fracture resistance test, epoxy resin dies were optically scanned using Omnicam scanner and 30 crowns were fabricated using the CAD/ CAM ceramic materials (n = 10) for each tested material. The crowns were cemented using self-adhesive resin cement. A compressive load was applied at a cross head speed of 1mm/min and the fracture load in Newtons was recorded for each specimen. Fractured crowns were examined to determine the mode of fracture. Results:Marginal and internal fit evaluation showed that group I (Vita Suprinity) recorded the least mean in respect to all measuring points (103.6±10.4µm), while group III (In Coris TZI) showed the highest mean in respect to all points (146.7±9.23µm). For fracture resistance, In Coris TZI zirconia showed the highest fracture load (4548.9±200.9 N), while the lowest mean value was recorded in Vita Suprinity (3484.8±22.17 N). There was no significant difference between Vita Suprinity and IPS e.max CAD.Conclusion: Vita Suprinity crowns showed the best marginal and internal fit when compared to the other two materials. In-Coris TZI exhibited the highest fracture strength of all three groups. All values were within a clinically acceptable range for the three ceramic materials tested. (1572)

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Section: Marginal and Internal Fitsupporting

confidence: 93%

Evaluation of Fracture Resistance and Fit Accuracy of Three Types of Cad/Cam Fabricated Crowns Using Cone Beam Computerized Tomography

Moaty

Azer

2018

Egyptian Dental Journal

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“…These findings imply that the cement space thickness is of secondary importance compared with the influence of loading conditions or cement moduli [28]. The mean IG values of both groups do not reproduce the configured cement spaces in the design software, which is consistent with the results of previous research [14,15,29]. One explanation could be the preparation design, especially the convergence angle of the axial walls, which might affect the accuracy of fit.…”

Section: Discussionsupporting

confidence: 77%

“…The mean AMD values were 182.6 μm for the 50 μm group and 211.9 μm for the 80 μm group. These results Enamic crowns, the AMD values of both groups in the present study are higher [15]. A possible explanation for these results might be that Yildirim et al used another intra-oral scanner for the impression taking process and a different milling unit.…”

Section: Discussionsupporting

confidence: 45%

“…Iwai et al, for example, concluded that zirconia copings with a cement space set to 60 μm showed better marginal adaptation than copings with cement space set to 10 and 30 μm [14]. Similarly, Kale et al reported that cement space settings greater than 30 μm improve the marginal fit of monolithic zirconia crowns [11], while Yildirim et al found clinically acceptable marginal and internal adaptation values for PICN material crowns using spacer settings of 40 μm [15]. Furthermore, according to Shim et al, spacer settings of 80 μm showed better repeatability of marginal and internal fit values [16].…”

mentioning

confidence: 99%

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Influence of two different cement space settings and three different cement types on the fit of polymer-infiltrated ceramic network material crowns manufactured using a complete digital workflow

et al. 2019

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Objectives The study evaluates the influence of two spacer settings and three resin luting materials on the marginal and internal fit of polymer-infiltrated ceramic network (PICN) material crowns manufactured using a complete digital workflow. Methods Optical impressions of fifty identical dies were performed using the 3M scanner (software version 5.0.2). Twenty crowns were designed using Ceramill Mind (version 3.4.10.1163), from which ten with spacer setting of 50 μm (G1) and ten with 80 μm (G2). Thirty crowns (spacer setting of 50 μm) were divided into three groups corresponding to the resin materials used as follows: RelyX Unicem (RX), Variolink Esthetic (VLE), and Nexus 3 (NX3). All crowns were milled from Vita Enamic blocks. After micro-CT scanning, absolute marginal discrepancy (AMD), internal gap (IG), total cement space volume (TCV), and marginal porosities (VP) were measured. Results Significant difference was detected on the VP between the RX and NX3 group (p = 0.033). The mean values of all parameters were the following: AMD (μm)VP (mm 3 ): G1 0.26, G2 0.34, RX 0.32, VLE 0.46, NX3 0.54. Conclusions Fit of PICN material crowns was not significantly influenced by increasing the spacer settings and cementation with different resin materials. Additionally, RelyX Unicem showed significantly less porosities as compared with Nexus3. Clinical relevance Both 50 μm and 80 μm virtual spacer settings can be suggested for the manufacture of PICN crowns when Ceramill Mind (version 3.4.10.1163) is used. Furthermore, a self-adhesive system can be recommended for the cementation.

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“…Enamic crowns were used as representative for hybrid ceramic materials as a study from Yldirim et al stated that the marginal and internal adaptation values were within a clinically acceptable range for all 3 hybrids and nanoceramics tested for their study [20].…”

Section: Resultsmentioning

confidence: 99%

Multivariate Assessment of Marginal Fit of Three Types of Dental Crowns Using Three Scanning Systems for CAD-CAM Technology - in vitro Pilot Study

Buduru¹,

Mesaroş²,

Culcitchi³

et al. 2018

Mat.Plast.

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The objective of this in-vitro study was to compare if there are any differences in the marginal fit of crowns fabricated by CAD/CAM technique. We used three different types of materials (two types of polymethylmetacrylate (PMMA) provided by two different manufacturers and one type of hybrid ceramic) and three different types of impressions: intraoral scanning, model scanning and conventional impression scanning. The crowns were subsequently measured with an electronic microscope at 1000X. Our results showed better results for the hybrid ceramic. The differences between the PMMA were not significant. There were no statistic differences with the ANOVA analysis between the scanning methods. Best combination in terms of marginal fit was found with hybrid ceramic and intraoral scanning.

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Evaluation of marginal and internal adaptation of hybrid and nanoceramic systems with microcomputed tomography: An in vitro study

Cited by 53 publications

References 28 publications

Evaluation of Fracture Resistance and Fit Accuracy of Three Types of Cad/Cam Fabricated Crowns Using Cone Beam Computerized Tomography

Evaluation of Fracture Resistance and Fit Accuracy of Three Types of Cad/Cam Fabricated Crowns Using Cone Beam Computerized Tomography

Influence of two different cement space settings and three different cement types on the fit of polymer-infiltrated ceramic network material crowns manufactured using a complete digital workflow

Multivariate Assessment of Marginal Fit of Three Types of Dental Crowns Using Three Scanning Systems for CAD-CAM Technology - in vitro Pilot Study

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