Digital evaluation of absolute marginal discrepancy: A comparison of ceramic crowns fabricated with conventional and digital techniques

Liang, Shanshan; Yuan, Fusong; Xu, Luo; Yu, Zhuoren; Tang, Zhihui

doi:10.1016/j.prosdent.2017.10.014

Cited by 21 publications

(23 citation statements)

References 22 publications

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“…12,20 Recently, with the advancements in the field of computer analysis systems, a new measurement method has been known to be available to science, 3D scanning and superimposing the STL files of the crown and die by reverse engineering software. 14 The present study implemented the 3D scanning and best fit alignment following the point-based registration method to measure the MD by three-matic program. Unlike the other 3D modeling software and in vitro methods that provide limited measurements, three-matic calculates the mean of every possible discrepancy measurement in negative and positive values.…”

Section: Discussionmentioning

confidence: 99%

“…In the present study, both negative and positive MD values of all groups were less than 120 μm, which is accepted by most of the authors as the maximum MD value. 14,22,23 Therefore, the marginal adaptation of all resin-ceramic crowns can be considered as clinically acceptable. These results correspond with some researches, 4,24 but are contrary to some other studies.…”

Section: Discussionmentioning

confidence: 99%

“…13 Poor marginal adaptation was related to cement dissolution, plaque retention, microleakage, plaque accumulation, secondary caries, pulpal pathology, and periodontal disease. 14,15 The marginal adaptation of a crown can be affected by the restoration material used. 14,16 Manufacturers of new resin-ceramic CAD/CAM blocks have claimed that the improved machinability of these materials enables smoother and better-adapted margins after milling.…”

Section: Introductionmentioning

confidence: 99%

“…14,15 The marginal adaptation of a crown can be affected by the restoration material used. 14,16 Manufacturers of new resin-ceramic CAD/CAM blocks have claimed that the improved machinability of these materials enables smoother and better-adapted margins after milling. 3,9 However, restorations produced from different resin-ceramic CAD/CAM blocks may vary in terms of marginal adaptation because of the diversity in proportions of resin-ceramic ingredients and network design.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of Marginal Adaptation of Different Resin-Ceramic CAD/CAM Crowns: An In Vitro Study

Oğuz

Kılıçarslan

Özgür

et al. 2020

Journal of Advanced Oral Research

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Aim: To compare the marginal adaptation of crowns fabricated by using three different resin-ceramic computer-aided design/computer-aided manufacturing (CAD/CAM) materials. Materials and Methods: Crowns fabricated from three different resin-ceramic CAD/CAM blocks, applied on a typodont premolar (#14), were tested with regard to marginal adaptation, in this in vitro study. The typodont maxillary first premolar was prepared to serve as the master die and digitized with an intraoral scanner. The same virtual crown design was used to fabricate all specimens. Forty-eight crowns were fabricated from the same virtual crown design using three different CAD/CAM resin-ceramic blocks as follows ( n = 16): Lava Ultimate (LU), GC Cerasmart (GC), Vita Enamic (VE). Master die and crowns were scanned with a laboratory scanner and three-dimensional data were transferred into three-matic software. The software calculated the mean of the marginal discrepancy (MD) for each crown in negative and positive values, representing under and over estimation of the crown margin, respectively. A marginal discrepancy index (MDI) was obtained for each group using negative and positive MDs. All data were statistically analyzed using one-way analysis of variance and Tukey’s honest significance test ( α = 0.05). Results: The analysis of variance showed no statistical differences between materials regarding the negative and positive MDs ( P > .05). The MDI for LU was lower than GC and VE ( P < .05). Conclusion: The marginal adaptation of different resin-ceramic materials was different with regard to MDI values. Nevertheless, the MD values of all groups were within the clinically acceptable range.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of Marginal Adaptation of Different Resin-Ceramic CAD/CAM Crowns: An In Vitro Study

Oğuz

Kılıçarslan

Özgür

et al. 2020

Journal of Advanced Oral Research

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“…The marginal and internal adaptations are critical factors that determine the success of the restoration. While the marginal misfit was related to cement dissolution, microleakage, plaque accumulation, secondary caries, and periodontal disease, the internal misfit was associated with poor mechanical retention and reduced fractural strength [ 7 , 18 – 20 ]. The adaptation may vary depending on the restorative material or production method of the restoration [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Adaptation of Esthetic Prefabricated Fiberglass and CAD/CAM Crowns for Primary Teeth: Microcomputed Tomography Analysis

Oğuz

Bezgin

Orhan

et al. 2021

BioMed Research International

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Adaptation is an important factor for the clinical success of restorations. However, no studies are available evaluating the adaptation of primary crowns. The aim of this study was to compare the adaptation of crowns fabricated by CAD/CAM technology versus prefabricated fiberglass primary crowns. Typodont maxillary central, canine, and mandibular molar teeth were prepared to serve as master dies after the size of Figaro crowns was determined ( n = 10 ). Master dies were scanned with an intraoral scanner, and 10 identical CAD/CAM crowns were fabricated from resin-ceramic blocks. Figaro and CAD/CAM crowns were placed on the corresponding master dies and scanned via micro-CT. Three-dimensional volumetric gap measurements were performed to evaluate the overall adaptation. A total of 255 location-based linear measurements were allocated into 4 categories: marginal, cervical-axial, middle-axial, and occlusal. Statistical analyses were performed with factorial ANOVA, repeated measure ANOVA, and LSD tests ( α = 0.05 ). CAD/CAM crowns showed significantly lower overall and location-based gap measurements than Figaro crowns regardless of tooth number ( p < 0.05 ). For all groups, mean marginal discrepancies were lower than occlusal measurements ( p < 0.05 ). Both crown types showed higher marginal gaps for molar teeth than for canine and central incisors with no significant difference between them ( p > 0.05 ). CAD/CAM-fabricated crowns showed better marginal and internal adaptation than prefabricated Figaro crowns.

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Marginal and internal fit of feldspathic ceramic CAD/CAM crowns fabricated via different extraoral digitization methods: a micro-computed tomography analysis

et al. 2020

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Digital evaluation of absolute marginal discrepancy: A comparison of ceramic crowns fabricated with conventional and digital techniques

Cited by 21 publications

References 22 publications

Comparison of Marginal Adaptation of Different Resin-Ceramic CAD/CAM Crowns: An In Vitro Study

Comparison of Marginal Adaptation of Different Resin-Ceramic CAD/CAM Crowns: An In Vitro Study

Comparative Evaluation of Adaptation of Esthetic Prefabricated Fiberglass and CAD/CAM Crowns for Primary Teeth: Microcomputed Tomography Analysis

Marginal and internal fit of feldspathic ceramic CAD/CAM crowns fabricated via different extraoral digitization methods: a micro-computed tomography analysis

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