Accuracy of ceramic restorations made with two CAD/CAM systems

Hamza, Tamer; Ezzat, H. A.; El-Hossary, Mohamed Mahmoud Khalil; Katamish, Hesham; Shokry, Tamer E.; Rosenstiel, Stephen F.

doi:10.1016/s0022-3913(13)60020-7

Cited by 135 publications

(115 citation statements)

References 17 publications

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“…Digital images were taken at a 100× magnification and the marginal gap was measured with computer software (Optimas 6.5, Media Cybernetics, Rockville, MD, USA). The Everest CAD/CAM system specimens showed significantly lower marginal gap (28.1±7.9 SD microns) than those of the Cerec InLab system specimens (40.2±6.7 SD microns) (p-value<0.05) 15) . The authors attributed this difference to the 3-axis milling unit of the Cerec InLab, compared to the 5-axis unit of the Everest system.…”

Section: Resultsmentioning

confidence: 76%

“…Hamza and colleagues 15) measured the marginal gap of E.max CAD crowns using two different CAD/CAM systems (CEREC InLab, Kavo Everest). Digital images were taken at a 100× magnification and the marginal gap was measured with computer software (Optimas 6.5, Media Cybernetics, Rockville, MD, USA).…”

Section: Resultsmentioning

confidence: 99%

“…Groten et al suggested that, ideally, 50 or at least 20-25 measurements are required to obtain clinically relevant information about the gap size 53) . The Cerec 3D system (Sirona, Bensheim, Germany) and the Everest system (Kavo, Bismarckring, Germany) use different software and milling systems to fabricate ceramic restorations 15) . Hamza et al concluded that the Everest CAD system crowns showed significantly lower marginal gap than those of the Cerec InLab system 15) .…”

Section: Discussionmentioning

confidence: 99%

“…CAD/CAM has been available for dental use since its development by Duret in France in the 1970s (System Duret CAD/CAM) 11) . Chairside CAD/CAM systems including Cerec (Sirona Dental Systems) are recognized as reliable chairside CAD/CAM systems [12][13][14] allowing the fabrication of restorations from monolithic blocks of lithium disilicate (IPS E.max CAD) 15) . Following design and milling, the precrystallized restorations undergo a heat crystallization process to achieve maximum strength 7,16) .…”

Section: Introductionmentioning

confidence: 99%

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The marginal fit of E.max Press and E.max CAD lithium disilicate restorations: A critical review

2016

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This critical review aimed to assess the vertical marginal gap that was present when E.max lithium disilicate-based restoration (Press and CAD) are fabricated in-vitro. Published articles reporting vertical marginal gap measurements of in-vitro restorations that had been fabricated from E.Max lithium disilicate were sought with an electronic search of MEDLINE (PubMed) and hand search of selected dental journals. The outcomes were reviewed qualitatively. The majority of studies that compared the marginal fit of E.max press and E.max CAD restorations, found that the E.max lithium disilicate restorations fabricated with the press technique had significantly smaller marginal gaps than those fabricated with CAD technique. This research indicates that E.max lithium disilicate restorations fabricated with the press technique have measurably smaller marginal gaps when compared with those fabricated with CAD techniques within in-vitro environments. The marginal gaps achieved by the restorations across all groups were within a clinically acceptable range.

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Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The marginal fit of E.max Press and E.max CAD lithium disilicate restorations: A critical review

2016

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“…24 Relatively large internal gaps can result from the milling process, 25 but gaps of up to 150 mm are clinically tolerable. 26 The marginal gap differs among CAD/CAM systems, [27][28][29] but with the continual development of milling machines, marginal gaps are becoming progressively smaller. 30 The accuracy of fitting to the underlying tooth structure is an essential consideration and could affect the longevity of restorations.…”

Section: Discussionmentioning

confidence: 99%