Title
Exploring marginal fit impact on fracture resistance of in-ceram alumina onlays in molar restorations: An in vitro study
Authors
Mohamed Samir Elnawawy1, Mohammed Ahmad Albahi2, Hassan Abdullah Janbi2, Mahmoud Majid Alsawaf2, Saif Abdulrahman Aliqali2, Adnan Hazim Salama2 & Fawaz Pullishery3,*
Affiliation
1Department of Clinical Sciences, General Dentistry Program, Batterjee Medical College, Jeddah, Saudi Arabia; 2Dental intern, General Dentistry Program, Batterjee Medical College, Jeddah, Saudi Arabia; 3Department of Preventive Dentistry, General Dentistry Program, Batterjee Medical College, Jeddah, Saudi Arabia; *Corresponding author
Mohamed Samir Elnawawy - E-mail:
mohamedelnawawy1976@gmail.com
Mohammed Ahmad Albahi - E-mail: mohammedalbahi0@gmail.com
Hassan Abdullah Janbi - E-mail: hasjanbi@gmail.com
Mahmoud Majid Alsawaf - E-mail: saw99.99@icloud.com
Saif Abdulrahman Aliqali - E-mail: saifog@icloud.com
Adnan Hazim Salama - E-mail: dr.adnansalamah1@gmail.com
Fawaz Pullishery - E-mail: fawaz.pullishery@bmc.edu.sa
Article Type
Research Article
Date
Received September 1, 2026; Revised September 30, 2026; Accepted September 30, 2026, Published September 30, 2026
Abstract
The reinforcing potential and overall effect of advanced ion-releasing materials, conventional flowable composites and RMGI cements-alongside deep margin elevation-on the fracture resistance of molars restored with in-ceram alumina ceramic onlays remain unclear due to insufficient comparative evidence. Therefore, it is of interest to evaluate the type of deep margin acquisition (DMA) material (Cention Forte, Tetric N-Flow and RMGIC) affects the fracture resistance (FR) of molars restored with In-Ceram Alumina ceramic onlays and which materials best structurally reinforce teeth with deep cervical margins. Five groups of 10 specimens were randomly allocated to enamel margin (control–supragingival), cementum margin (control–subgingival), Cention Forte DMA, Tetric N-Flow DMA and resin-modified glass ionomer (RMGI) DMA. The results of this study indicate that DMA particularly when using RMGI or Cention Forte, enhances the restored molars and improves their biomechanical function. On the contrary, Tetric N-Flow did not show an increase in FR compared to the control groups. The application of RMGI or Cention Forte as a DMA material improves the structural integrity and, consequently, the FR of MOD cavities restored with In-Ceram Alumina onlays.
Keywords
Cention Forte, deed margin acquisition (DMA), fracture resistance (FR), resin-modified glass ionomer, tetric N- Flow
Citation
Elnawawy et al. Bioinformation 22(9): 5854-5860 (2026)
Edited by
Vini Mehta
ISSN
0973-2063
Publisher
License
This is an Open Access article which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. This is distributed under the terms of the Creative Commons Attribution License.
