Predicting marginal fit of CAD/CAM crowns based on the presence or absence of common preparation errors

Renne, Walter; McGill, S. Theodore; Forshee, Kaitlyn VanSickle; Defee, Michael; Mennito, Anthony S.

doi:10.1016/s0022-3913(12)60183-8

Cited by 91 publications

(98 citation statements)

References 28 publications

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“…The mean marginal gap was 38.5 microns with a standard deviation 9 microns for the ideal preparation group, 58.3 microns with a standard deviation 12 microns for the fair preparation group, and 90.1 microns with a standard deviation 23 microns for the poor preparation group. The authors concluded that the category of preparation affected significantly the marginal fit of E.max CAD crowns (p-value<0.001) 17) …”

Section: Resultsmentioning

confidence: 99%

“…Renne and colleagues 17) studied the marginal gap of E.max CAD (E4D scanning unit) crowns in combination with three categories of preparation: Ideal (n=25), fair (n=34), and poor (n=15). The authors considered both heavy chamfer and modified shoulder preparations as acceptable.…”

Section: Resultsmentioning

confidence: 99%

“…Following design and milling, the precrystallized restorations undergo a heat crystallization process to achieve maximum strength 7,16) . The technology allows dental practitioners to fabricate restorations in a single visit by using intraoral optical impressions and in-office milling 17) . This workflow avoids use of provisional cements, and it has been argued that this results in improved dentine adhesion 18) .…”

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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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: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

2016

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“…Often, a clear differentiation between these potentially counteracting effects is not possible [25,26].…”

Section: Introductionmentioning

confidence: 99%

Comparison of an analog and digital quantitative and qualitative analysis for the fit of dental copings

Kuhn

Ostertag

et al. 2015

Computers in Biology and Medicine

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“…Currently, while the popularity of the CAD/CAM laboratory systems is increasing dramatically, initial CAD/CAM prostheses have been criticized for the poor fit by some authors [6–8]. However, this defect has been improved quickly and many recent studies reported that the fit of the CAD/CAM all-ceramic crowns is similar to that of conventionally fabricated crowns [6, 9–13].…”

Section: Introductionmentioning

confidence: 99%

Clinical Acceptability of the Internal Gap of CAD/CAM PD-AG Crowns Using Intraoral Digital Impressions

Kim

Choi

et al. 2016

BioMed Research International

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The purpose of this study was to compare the internal gap between CAD/CAM palladium-silver crowns and cast gold crowns generated from intraoral digital versus conventional impressions and to determine the clinical acceptability. Nickel-chrome master dies were made from the prepared resin tooth with the conventional impression method (n = 40). For ICC (Intraoral, CAD/CAM) group, 10 intraoral digital impressions were made, and 10 CAD/CAM crowns of a PD-AG (palladium-silver) machinable alloy were generated. For IC (Intraoral, Cast) group, 10 gold crowns were cast from ten intraoral digital impressions. For CCC (Conventional, CAD/CAM) group, 10 CAD/CAM PD-AG crowns were made using the conventional impression method. For CC (Conventional, Cast) group, 10 gold crowns were fabricated from 10 conventional impressions. One hundred magnifications of the internal gaps of each crown were measured at 50 points with an optical microscope and these values were statistically analyzed using a two-way analysis of variance (α = 0.05). The internal gap of the intraoral digital impression group was significantly larger than in the conventional impression group (P < 0.05). No significant difference was observed between the CAD/CAM group and the cast group (P > 0.05). Within the limitations of this in vitro study, crowns from intraoral digital impressions showed larger internal gap values than crowns from conventional impressions.

show abstract

Predicting marginal fit of CAD/CAM crowns based on the presence or absence of common preparation errors

Cited by 91 publications

References 28 publications

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

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

Comparison of an analog and digital quantitative and qualitative analysis for the fit of dental copings

Clinical Acceptability of the Internal Gap of CAD/CAM PD-AG Crowns Using Intraoral Digital Impressions

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