Scopus
🔓 Açık Erişim
Evaluation of the marginal fit of full ceramic crowns by the microcomputed tomography (micro-CT) technique
European Journal of Dentistry · Ocak 2014
Makale Bilgileri
DergiEuropean Journal of Dentistry
Yayın TarihiOcak 2014
Cilt / Sayfa8 · 437-444
Scopus ID2-s2.0-84916210414
Erişim🔓 Açık Erişim
Özet
Objective: To evaluate the marginal gap (MG) and absolute marginal discrepancy (MD) of full ceramic crowns with two finish line designs, shoulder and chamfer, using microcomputed tomography (micro-CT) before and after cementation. Materials and Methods: Sixty extracted human maxillary premolar teeth were divided into two groups based on the finish line design: Group I: 90° shoulder and Group II: 135° chamfer. The specimens were further grouped based on the type of full ceramic crown they received: Group A: Feldspathic Cerec inLab ceramic system, Group B: Cerec inLab aluminum oxide ceramic system and Group C: Lithium disilicate press ceramic system. Before cementation, five crowns from each group were scanned using micro-CT in two sections, sagittal and coronal, to determine the MG and MD values for four regions of the crown (sagittal buccal, sagittal lingual, coronal mesial and coronal distal). After cementation and thermal cycling, the scanning was repeated. Measurements were obtained from 10 points for each region, 80 points totally, to evaluate the MG and MD values. Files were processed using NRecon and CTAn software. Results were statistically analyzed using one- and two-way ANOVA and Tukey HSD tests (P = 0.05). Results: Full ceramic systems showed clinically acceptable marginal adaptation values. The Feldspathic Cerec inLab ceramic system generally presented the lowest variance, except in the MG values of the coronal mesial region. The MG and MD values of all ceramics increased significantly after cementation, except in the shoulder preparation design (sagittal buccal region) for MG and in the chamfer preparation design (sagittal lingual region) for MD values. Conclusions: Full-ceramic crowns showed clinically acceptable marginal adaptation values. The Feldspathic Cerec inLab ceramic system (Vitablocs Mark II) generally presented the lowest variance when compared with the other ceramics, except for the MG values on the mesial surface of the coronal section.
Yazarlar (3)
1
Necla Demir
ORCID: 0000-0003-0927-6962
2
A. Nilgun Ozturk
3
Meral Arslan Malkoc
Anahtar Kelimeler
Full ceramic crowns
Marginal fit
Microcomputed tomography technique
Kurumlar
Inönü Üniversitesi
Malatya Turkey
Selçuk Üniversitesi
Selçuklu Turkey
Metrikler
78
Atıf
3
Yazar
3
Anahtar Kelime