Clinical Marginal and Internal Fit of Crowns Fabricated Using Different CAD/CAM Technologies

Huang, Zhuoli; Zhang, Lu; Zhu, Jingwei; Zhao, Yiwei; Zhang, Xiu Yin

doi:10.1111/jopr.12209

Cited by 54 publications

(66 citation statements)

References 33 publications

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“…Ideal marginal adaptation causes less gingival irritation and cement dissolution. The deterioration of marginal fit over time can result in microleakage and plaque accumulation . It leads to the adherence of oral bacteria and may increase the risk of secondary caries, endodontic inflammation, postoperative sensitivity, and periodontal problems …”

Section: Introductionmentioning

confidence: 99%

Evaluation of two different CAD‐CAM inlay‐onlays in a split‐mouth study: 2‐year clinical follow‐up

Coskun

Aslan

Özkan

2019

J Esthet Restor Dent

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Objective To evaluate the clinical performance of hybrid ceramic inlay‐onlay restorations over a 2‐year period. Clinical Considerations A total of 30 lithium disilicate glass ceramic (LDC; control group) and 30 hybrid ceramic (HC; test group) inlay/onlay restorations were performed in 14 patients. Clinical evaluations were performed after 1 week, 6 months, 1 year, and 2 years of cementation according to the modified United States Public Health Service (USPHS) criteria, gingival index, and plaque index. The Friedman test was used for the significant difference in time and Wilcoxon signed‐rank test was used for the determination of differences. The clinical parameters, gingival and plaque indexes differences in time were analyzed with Chi‐square test. No statistically significant difference (P > .05) was found between the two groups in the modified USPHS, gingival index, and plaque index evaluations, whether statistically significant differences were found within groups. The total survival rate was 100% for both groups after 2 years. Conclusion Based on the 2‐year data, the tested HC can be considered a reliable material for inlay/onlay restorations. Clinical Significance The results of this in vivo study suggest that both resin nanoceramic materials and LDC materials have been successfully incorporated in treatments of inlay and onlay restorations. Short‐term results showed that resin nanoceramic materials can be counted as a good choice in inlay and onlay restorations in an effort to reduce the treatment time associated with ceramic firing processes.

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Section: Introductionmentioning

confidence: 99%

Evaluation of two different CAD‐CAM inlay‐onlays in a split‐mouth study: 2‐year clinical follow‐up

Coskun

Aslan

Özkan

2019

J Esthet Restor Dent

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“…A recently published study that evaluated the marginal and internal fit, of two different milling systems, where a system used selective laser melting and the other a CAD/CAM system, found that the first system presented superior results for marginal and internal fit [28]. Maybe it would be interesting to investigate the polishing of the preparation and increase the number of groups to be evaluated, such as using the laser system mentioned above.…”

Section: Discussionmentioning

confidence: 99%

“…Adequate internal adaptation is especially important for placement of ceramic restorations because it results in homogeneous distribution of masticatory loads under stress [16, 17, 26–28]. And when the ceramic restoration is well adapted chances of infiltration to occur in the margins of the tooth-restoration assembly are reduced.…”

Section: Introductionmentioning

confidence: 99%

Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns

Sinhori

Andrada

Lopes

et al. 2017

International Journal of Biomaterials

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The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for crown and nonpolished preparations for crowns. For this purpose, 20 first molars were selected, which were divided into two groups (n = 10) G1, teeth that received surface roughening similar to preparation without polishing, and G2 (control), polished preparations. After the preparations were completed the teeth were scanned (Cerec Bluecam, Sirona, Bensheim, Germany), and the crowns were designed and machined using CAD/CAM technology (Sirona, Bensheim, Germany). The adaptation of the pieces was evaluated using polyvinyl siloxane replicas and stereomicroscope photographs with 70x magnifications. The normality test indicated a nonnormal result, so a Man–Whitney nonparametric test was performed. One out of the 24 measured regions showed a statistically significant difference (p = 0.0494). With this study it can be concluded that crowns fabricated by CAD/CAM technology performed on unpolished preparations are not influenced by the internal marginal adaptation and the ceramic part and are different from polished preparations.

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“…All ceramic, CAD/CAM full coverage restorations are becoming increasingly popular as this method provides expedient prosthesis fabrication with acceptable marginal accuracy . Compared to traditional laboratory‐fabricated cast restorations, CAD/CAM‐generated restorations rely more on adhesive technology, which proponents claim can compensate for loss of traditionally recommended preparation features .…”

Section: Introductionmentioning

confidence: 99%

Fracture resistance of all‐ceramic crowns based on different preparation designs for restoring endodontically treated molars

Krance

DuVall²,

Brewster³

et al. 2018

J Esthet Restor Dent

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The results of this in vitro test suggests that when suitable tooth structure and sufficient interact restorative space exists, endodontically treated molars restored with lithium disilicate complete crowns based on preparations with amalgam core foundations containing 1 mm and 2 mm of dentin axial wall height could serve as a suitable restorative option that may provide more recoverable failure modes than endocrown restorations.

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Clinical Marginal and Internal Fit of Crowns Fabricated Using Different CAD/CAM Technologies

Abstract: The SLM system demonstrated better marginal and internal fit compared to the two CAD/CAM grinding systems examined. Tooth type did not significantly influence the marginal or internal fit.

Cited by 54 publications

References 33 publications

Evaluation of two different CAD‐CAM inlay‐onlays in a split‐mouth study: 2‐year clinical follow‐up

Evaluation of two different CAD‐CAM inlay‐onlays in a split‐mouth study: 2‐year clinical follow‐up

Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns

Fracture resistance of all‐ceramic crowns based on different preparation designs for restoring endodontically treated molars

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