Influence of Different Marginal Preparation Designs and Materials on the Marginal Integrity and Internal Adaptation of Endocrown Restorations
AL-Zomur, S., Abo-Madina, M., Hassouna, M. (2021). Influence of Different Marginal Preparation Designs and Materials on the Marginal Integrity and Internal Adaptation of Endocrown Restorations. EKB Journal Management System, 67(4), 3491-3500. doi: 10.21608/edj.2021.85048.1710
Samra AL-Zomur; Manal Abo-Madina; Mahy Hassouna. "Influence of Different Marginal Preparation Designs and Materials on the Marginal Integrity and Internal Adaptation of Endocrown Restorations". EKB Journal Management System, 67, 4, 2021, 3491-3500. doi: 10.21608/edj.2021.85048.1710
AL-Zomur, S., Abo-Madina, M., Hassouna, M. (2021). 'Influence of Different Marginal Preparation Designs and Materials on the Marginal Integrity and Internal Adaptation of Endocrown Restorations', EKB Journal Management System, 67(4), pp. 3491-3500. doi: 10.21608/edj.2021.85048.1710
AL-Zomur, S., Abo-Madina, M., Hassouna, M. Influence of Different Marginal Preparation Designs and Materials on the Marginal Integrity and Internal Adaptation of Endocrown Restorations. EKB Journal Management System, 2021; 67(4): 3491-3500. doi: 10.21608/edj.2021.85048.1710

Influence of Different Marginal Preparation Designs and Materials on the Marginal Integrity and Internal Adaptation of Endocrown Restorations

Egyptian Dental Journal
Article 20, Volume 67, Issue 4, October 2021, Page 3491-3500  XML PDF (841.37 K)
Document Type: Original Article
DOI: 10.21608/edj.2021.85048.1710
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Authors
Samra AL-Zomur email 1; Manal Abo-Madina2; Mahy Hassouna3
1Master’s Degree Student, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University.
2Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University.
3Lecture, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University
Abstract
ABSTRACT
Objective: This in vitro study was performed to assess the marginal accuracy and internal adaptation of CAD/CAM fabricated endocrowns restoring endodontically treated molars with two different designs and materials.
Materials and methods: Forty extracted maxillary first molar teeth were divided into two main groups (n=20) according to the preparation designs: group B: (Butt joint) & group S (Shoulder finish line): and each group was subdivided into two subgroups (n=10) according to materials: group E: lithium disilicate glass-ceramic (IPS e.max CAD; Ivoclar Vivadent AG) & group C: hybrid nanoceramic (Cerasmart; GC Corp). A digital scan was made with a digital scanner (Identica Hybrid Scanner; Germany) and virtual endocrowns were milled with a 5-axis milling machine ((Imes-Icore; CORiTEC250i; Germany). The silicone replica technique and a stereomicroscope (25X) were used to measure the marginal and internal gaps of endocrowns at different points. All data were statistically analyzed using three-way ANOVA test with Post Hoc Tukey test to detect pair-wise comparison. Student's t-test also was used.
Results: There was a statistically significant difference between the preparation designs on the marginal integrity and internal adaptation (p < 0.05), but restorative materials significantly affected on the internal adaptation (p < 0.05) and showed no significant effect on the marginal integrity (p>0.05).
Conclusions: All tested groups showed acceptable marginal and internal gaps mean values. Butt joint design showed a better effect than shoulder finish line design on the marginal integrity and internal adaptation. Cerasmart showed a better effect than IPS e.max CAD on the internal adaptation.
Keywords
Endocrown Restorations; Marginal Integrity; Internal Adaptation; IPS e.max; Cerasmart
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