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. 2025 Apr 12.
doi: 10.1007/s10266-025-01089-2. Online ahead of print.

In vitro comparison of marginal fit between CAD/CAM hybrid ceramic crowns and prefabricated zirconia crowns for primary molars

Nehal Raid Salman  1 , Nagwa Mohammad Ali Khattab  2 , Yasser Gomaa  3 , Ahmad Abdel Hamid Elheeny  4
Affiliations

In vitro comparison of marginal fit between CAD/CAM hybrid ceramic crowns and prefabricated zirconia crowns for primary molars

Nehal Raid Salman et al. Odontology. .

Abstract

This study aimed to compare the marginal fit of the hybrid ceramic Vita Enamic (VE) crown fabricated with CAD/CAM versus prefabricated zirconia crown (PZC). An in vitro study was conducted on fifty epoxy resin replicas of 25 standardly prepared mandibular second primary molars (2 replicas for each tooth) were obtained. One tooth was restored with CAD/CAM VE (Zahnfabrik, H. Rauter GmbH & Co. KG) after an optical impression acquired using CEREC Omnicam and the other tooth restored with PZC (NuSmile, Houston, TX, USA). Specimens were sectioned buccolingually and mesiodistally. The marginal fit average was measured using a scanning electron microscope (SEM). The difference was tested for statistical significance using an independent t test at a 5% significance level and 95% CI. CAD/CAM VE crowns showed superior marginal adaptation over the PZCs with a significant difference. The mean difference at the buccolingual section was -10.52 µm with a 95% CI of -20.99; -0.05 (P = 0.049). At the mesiodistal section, the mean difference was -10.56 µm with a 95% CI of -20.82; -0.30 (P = 0.044).VE provides a superior marginal fit over the PZC in the restoration of primary molars.

Keywords: Aesthetic; Child; Vita Enamic crown.

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Conflict of interest statement

Declarations. Conflict of interest: The authors declare no competing interests. Ethical approval and consent to participation: The ethical committee of the Faculty of Dentistry at Minia University approved the present study (Reference no. 318/2019). Written informed consent was obtained from the children's legal guardians to allow their participation and the use of their teeth in the study. Consent for publication: Not applicable.

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