Influence of conventional and digital intraoral impressions on the fit of CAD/CAM-fabricated all-ceramic crowns

Berrendero, Santiago; Salido, María Paz; Valverde, Araceli; Ferreiroa, Alberto; Pradíes, Guillermo

doi:10.1007/s00784-016-1714-6

Cited by 83 publications

(94 citation statements)

References 38 publications

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“…The choice of impression type thus does not influence the precision of the zirconia crown's adaptation. This is in line with previously published results 891011…”

Section: Discussionsupporting

confidence: 93%

Adaptation of zirconia crowns created by conventional versus optical impression:in vitrostudy

et al. 2017

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PURPOSEThe aim of this study was to compare the precision of optical impression (Trios, 3Shape) versus that of conventional impression (Imprint IV, 3M-ESPE) with three different margins (shoulder, chamfer, and knife-edge) on Frasaco teeth.MATERIALS AND METHODSThe sample comprised of 60 zirconia half-crowns, divided into six groups according to the type of impression and margin. Scanning electron microscopy enabled us to analyze the gap between the zirconia crowns and the Frasaco teeth, using ImageJ software, based on eight reproducible and standardized measuring points.RESULTSNo statistically significant difference was found between conventional impressions and optical impressions, except for two of the eight points. A statistically significant difference was observed between the three margin types; the chamfer and knife-edge finishing lines appeared to offer better adaptation results than the shoulder margin.CONCLUSIONZirconia crowns created from optical impression and those created from conventional impression present similar adaptation. While offering identical results, the former have many advantages. In view of our findings, we believe the chamfer margin should be favored.

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“…The choice of impression type thus does not influence the precision of the zirconia crown's adaptation. This is in line with previously published results 891011…”

Section: Discussionsupporting

confidence: 93%

Adaptation of zirconia crowns created by conventional versus optical impression:in vitrostudy

et al. 2017

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“…At present, despite the advances in digital dental science, conventional impressions may still be required for some cases with subgingival finish lines. Many in vitro and clinical studies have evaluated and compared the accuracy of digital and conventional impressions and restorations . In these studies, although finish lines in some teeth were extended subgingivally, the effect of finish line position on the results was not considered .…”

Section: Introductionmentioning

confidence: 99%

A clinical comparison of digital and conventional impression techniques regarding finish line locations and impression time

Koulivand

Ghodsi

Siadat

et al. 2019

J Esthet Restor Dent

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Objective This study compared digital and conventional impression techniques regarding impression time, frequency of adjustments, and adaptation of cobalt‐chromium (Co‐Cr) copings with supragingival and subgingival finish lines. Materials and Methods Thirty premolars prepared for single‐unit metal‐ceramic restorations with supragingival and subgingival finish lines (n = 15). Conventional impression and digital scan of prepared teeth were made. Using computer aided design/computer aided manufacturing (CAD/CAM) system the copings were produced by a milling machine from Co‐Cr blocks and internal and marginal discrepancies were measured using silicone replica technique. Data were analyzed using repeated measures ANOVA and Mann‐Whitney test (alpha = .05). Results The impression technique had a significant effect on the magnitude of gap (P < .001). The internal and marginal gaps in the digital technique (49.43 μ and 60.07 μ, respectively) were significantly lower than the values in the conventional method (91.88 μ and 96.96 μ, respectively—P < .001). Finish line positions had no significant effect on the fit and marginal gap of copings (P = .54 and .243, respectively). The mean impression time (19′:27″ in conventional technique and 10′:31″ in digital technique) was significantly shorter (P < .001) and the mean frequency of adjustments (2.2 times for conventional and 1.3 times for digital technique) was significantly lower in the digital technique (P < .001). The gingival biotype (thick or thin) had no significant effect on marginal and internal fit (P = .052 and .319, respectively). Conclusion The digital technique was superior in terms of fit, impression time, and frequency of adjustments. Finish line positions had no significant effect on the fit of copings. Clinical Significance Using intraoral scanner promotes the fits of restorations in supragingival and subgingival finish lines.

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“…But in the present case -thanks to Oracheck- the clinician could make an immediate comparative analysis of STL files, comparing the baseline model with follow-up STL files, without help from a specialized technician. This technology offers major advantages for conducting clinical studies in a range of fields/disciplines, as the clinician can make precise comparisons more quickly and efficiently (7-9). …”

Section: Discussionmentioning

confidence: 99%

“…But STL files can also be obtained directly from the patient’s mouth taking a digital impression with an intraoral digital scanner (7-9). Several intraoral digital scanners are available to clinicians; they are based on different technologies for information capture including wavefront sampling technology, confocal microscopy technology, or active triangulation technology with blue light (10,11).…”

Section: Introductionmentioning

confidence: 99%

In vivo evaluation of three-dimensional of volumetric changes using a CAD/CAM chair-side system: Technical procedure

Agustín-Panadero¹,

Ferreiroa²,

Pascual-Moscardó³

et al. 2017

J Clin Exp Dent

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An intraoral digital scanner in combination with specialized three-dimensional surface analysis software monitors volumetric changes to soft tissues or dental restorations. This technology can evaluate the success of a specific technique or medium- or long-term clinical outcomes in both clinical and research situations. This article describes how this technology was used to provide immediate chair-side data analysis without the help of specialized laboratory support. Key words:Intraoral scanner, CAD-CAM, best fit-method, surface tessellation language.

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Influence of conventional and digital intraoral impressions on the fit of CAD/CAM-fabricated all-ceramic crowns

Abstract: Impressions based on Ultrafast Optical Sectioning technology can be used for manufacturing ceramic crowns in a normal workflow, with the same results as silicone conventional impressions.

Cited by 83 publications

References 38 publications

Adaptation of zirconia crowns created by conventional versus optical impression:in vitrostudy

Adaptation of zirconia crowns created by conventional versus optical impression:in vitrostudy

A clinical comparison of digital and conventional impression techniques regarding finish line locations and impression time

In vivo evaluation of three-dimensional of volumetric changes using a CAD/CAM chair-side system: Technical procedure

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