MARGINAL ACCURACY AND INTERNAL FIT OF ENDOCROWN CONSTRUCTED FROM LITHIUM DISILICATE CERAMICS VERSUS POLY ETHER ETHER KETONE (PEEK) (AN IN VITRO STUDY)
elsaid sayed ahmed, M., Nabil, O., Elnaggar, G. (2025). MARGINAL ACCURACY AND INTERNAL FIT OF ENDOCROWN CONSTRUCTED FROM LITHIUM DISILICATE CERAMICS VERSUS POLY ETHER ETHER KETONE (PEEK) (AN IN VITRO STUDY). EKB Journal Management System, 71(1), 711-719. doi: 10.21608/edj.2024.339124.3273
mohamed sayed ahmed elsaid sayed ahmed; Omnia Nabil; Gihan Elnaggar. "MARGINAL ACCURACY AND INTERNAL FIT OF ENDOCROWN CONSTRUCTED FROM LITHIUM DISILICATE CERAMICS VERSUS POLY ETHER ETHER KETONE (PEEK) (AN IN VITRO STUDY)". EKB Journal Management System, 71, 1, 2025, 711-719. doi: 10.21608/edj.2024.339124.3273
elsaid sayed ahmed, M., Nabil, O., Elnaggar, G. (2025). 'MARGINAL ACCURACY AND INTERNAL FIT OF ENDOCROWN CONSTRUCTED FROM LITHIUM DISILICATE CERAMICS VERSUS POLY ETHER ETHER KETONE (PEEK) (AN IN VITRO STUDY)', EKB Journal Management System, 71(1), pp. 711-719. doi: 10.21608/edj.2024.339124.3273
elsaid sayed ahmed, M., Nabil, O., Elnaggar, G. MARGINAL ACCURACY AND INTERNAL FIT OF ENDOCROWN CONSTRUCTED FROM LITHIUM DISILICATE CERAMICS VERSUS POLY ETHER ETHER KETONE (PEEK) (AN IN VITRO STUDY). EKB Journal Management System, 2025; 71(1): 711-719. doi: 10.21608/edj.2024.339124.3273

MARGINAL ACCURACY AND INTERNAL FIT OF ENDOCROWN CONSTRUCTED FROM LITHIUM DISILICATE CERAMICS VERSUS POLY ETHER ETHER KETONE (PEEK) (AN IN VITRO STUDY)

Egyptian Dental Journal
Volume 71, Issue 1 - Serial Number 4, January 2025, Page 711-719  XML PDF (1.01 MB)
Document Type: Original Article
DOI: 10.21608/edj.2024.339124.3273
View on SCiNiTO View on SCiNiTO
Authors
mohamed sayed ahmed elsaid sayed ahmed email orcid 1; Omnia Nabilorcid 2; Gihan Elnaggarorcid 3
1Master of oral Fixed prosthodontics Faculty of Dentistry Cairo University
2Associate Professor, Fixed Prosthodontics Department, Cairo University and Newgiza University
3Professor of Fixed Prosthodontics, Faculty of Dentistry, Cairo University, Cairo, Egypt
Abstract
ABSTRACT
Statement of the problem: The use of peek for construction of endocrown has gained popularity due to its many advantages, yet limited data is available with regard to its marginal accuracy and internal fit.
Purpose: The purpose of the present study is to determine the marginal accuracy and internal fit of endocrown constructed from lithium disilicate ceramics and poly ether ether ketone (PEEK).
Methodology: 16 human lower molars were endodontically treated and prepared to receive endocrown restorations with Butt joint preparation design. Prepared teeth were equally divided into two groups, Group L: Lithium disilicate ceramics and Group P: Poly ether ether ketone. All restorations were CAD/CAM milled using five axis milling machine (CORiTEC 250i Series - imes – icore). Vertical Marginal adaptation was measured using USB Digital microscope with a built-in camera (Leica microscope) at fixed magnification of 20X. Internal fit was measured by replica technique.
Results: Lithium Disilicate endocrowns showed superior results, where they had statistically significant lower marginal discrepancy (28.86 ±12.69 µm) than PEEK (75.24 ± 28.89 µm) (P-value =0.002, Effect size =2.349) and statistically significant lower internal discrepancy (122.2±21.7 µm) than PEEK (163.1±25.1 µm) (P-value =0.043, Effect size =2.042). Regardless of the material of construction lingual side of endocrown showed the least marginal adaption and internal fit.
Conclusions: Lithium disilicate endocrowns showed better marginal adaptation and internal fit than PEEK endocrowns. Both groups exhibited clinically acceptable marginal discrepancies and fit. Accordingly, PEEK materials could be used as an alternative to Lithium disilicate for endocrown construction.
Keywords
Marginal; Accuracy; internal; fit
Statistics
Article View: 180
PDF Download: 150