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:: Volume 30, Issue 4 (10-2018) ::
J Islam Dent Assoc Iran 2018, 30(4): 139-144 Back to browse issues page
Effect of Scanner Type on Marginal Adaptation of e.max CAD Crowns
Hamid Jalali 1, Habib Hajmiragha 1, Farzaneh Farid * 2, Siavash Tabatabaie 3, Samar Jalali 4
1- Assistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
2- Assistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran , f.farid@yahoo.com
3- Dentist, Private Practice, Tehran, Iran
4- Student, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
Abstract:   (180 Views)
Background and Aim: Marginal adaptation has a significant role in the success and longevity of indirect restorations. This experimental study compared the effect of intraoral and extraoral scanning on the marginal adaptation of the crowns which was made using the CEREC AC system.
Materials and Methods: A Typodont maxillary first molar was prepared and served as the master die for an all-ceramic restoration. In the first group, the model was scanned ten times directly by the intraoral scanner. In the second group, ten conventional impressions were made from Typodont, and the extraoral scanner scanned the resulting gypsum casts. The data was used to design and build crowns from IPS e.max CAD blocks. The crowns were placed on the prepared tooth, and the marginal gap was measured at 16 points by a stereomicroscope at ×35 magnification. Collected data were analyzed using t-test.
Results: The mean marginal gap for intraoral and extraoral groups were 74.83 ± 10.07 μm and 102.56 ± 6.89 μm respectively. The gap was significantly less in the intraoral group (P-value = 0.001).
Conclusion: Marginal adaptation was clinically acceptable in both groups, although the results of intraoral scanning showed significantly lower gap than extraoral scanning.
Keywords: Computer aided design/computer aided manufacturing, all-ceramic crowns, intraoral scanners, extraoral scanners, Dental Marginal Adaptation
Full-Text [PDF 366 kb]   (58 Downloads)    
Type of Study: Orginal | Subject: Porosthodontics
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Jalali H, Hajmiragha H, Farid F, Tabatabaie S, Jalali S. Effect of Scanner Type on Marginal Adaptation of e.max CAD Crowns. J Islam Dent Assoc Iran. 2018; 30 (4) :139-144
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Volume 30, Issue 4 (10-2018) Back to browse issues page
Journal of Islamic Dental Association of Iran

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