Effect of number of remained vertical walls on fracture resistance and marginal and internal adaptation of endocrown restorations

Effect of number of remained vertical walls on fracture resistance and marginal and internal adaptation of endocrown restorations | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 11 June 2025 V1 Latest version Share on Effect of number of remained vertical walls on fracture resistance and marginal and internal adaptation of endocrown restorations Authors : Maryam Narenjkar , Narges Ameri , Maryam Hassanzadeh 0009-0008-0590-8428 , Ahmad Reza Moradi , and Rezvaneh Sadat Ghazanfari Hashemi [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.174963971.18343309/v1 150 views 80 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Purpose: This study assessed the effect of the number of remaining vertical walls on fracture resistance and marginal and internal adaptation of endocrown restorations. Materials and Methods: This in vitro study was conducted on 36 extracted mandibular molars. After endodontic treatment, the teeth were randomly divided into three groups (n=12) with four, three, and two remaining walls. The teeth were scanned, endocrowns were fabricated and seated, and their marginal and internal adaptation was assessed by measuring the gap at the margin (M1), center of cervical region (C1), cervico-axial angle (C2), three points at the axial wall (A1, A2, and A3), axiopulpal angle (P1), and center of pulpal floor (P2) by the replica technique. Fracture resistance was also measured. Data were analyzed by one-way ANOVA, and Tukey’s test (alpha=0.05). Results: The number of remaining walls significantly affected the gap at C1, C2, and P2. The mean gap at C1 in the 4-wall (P=0.002) and 2-wall (P=0.047) groups was significantly higher than that in the 3-wall group. The mean gap at C2 in the 4-wall group was also significantly higher than that in the 3-wall (P=0.017) and 2-wall (P=0.029) groups. The mean gap at P2 in the 4-wall group was significantly higher than that in the 2-wall group (P=0.037). The difference in fracture resistance was not significant among the groups (P=0.196). Conclusion: The number of remaining walls had no significant effect on fracture resistance, but the higher number of remaining walls may increase the internal and marginal gap of endocrowns. Supplementary Material File (endocrown copy.docx) Download 107.89 KB Information & Authors Information Version history V1 Version 1 11 June 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords dental marginal adaptation dental restoration flexural strength permanent Authors Affiliations Maryam Narenjkar Tehran University of Medical Sciences School of Dentistry View all articles by this author Narges Ameri Tehran University of Medical Sciences School of Dentistry View all articles by this author Maryam Hassanzadeh 0009-0008-0590-8428 Tehran University of Medical Sciences School of Dentistry View all articles by this author Ahmad Reza Moradi Tehran University of Medical Sciences School of Dentistry View all articles by this author Rezvaneh Sadat Ghazanfari Hashemi [email protected] Tehran University of Medical Sciences School of Dentistry View all articles by this author Metrics & Citations Metrics Article Usage 150 views 80 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Maryam Narenjkar, Narges Ameri, Maryam Hassanzadeh, et al. Effect of number of remained vertical walls on fracture resistance and marginal and internal adaptation of endocrown restorations. Authorea . 11 June 2025. DOI: https://doi.org/10.22541/au.174963971.18343309/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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