Effect of different materials with different intrapulpal extensions on fracture resistance of endocrown restored molars(Invitro study)
El-Agwany, M., Hamdy, A., Zohdy, M., Mahrous, A., Tawfik, A., Nabih, S. (2024). Effect of different materials with different intrapulpal extensions on fracture resistance of endocrown restored molars(Invitro study). EKB Journal Management System, 35(3), 374-382. doi: 10.21608/asdj.2024.291378.1290
Mohamed Aly El-Agwany; Amina Hamdy; maged Zohdy; Aliaa Mahrous; Ahmed Tawfik; Soha Nabih. "Effect of different materials with different intrapulpal extensions on fracture resistance of endocrown restored molars(Invitro study)". EKB Journal Management System, 35, 3, 2024, 374-382. doi: 10.21608/asdj.2024.291378.1290
El-Agwany, M., Hamdy, A., Zohdy, M., Mahrous, A., Tawfik, A., Nabih, S. (2024). 'Effect of different materials with different intrapulpal extensions on fracture resistance of endocrown restored molars(Invitro study)', EKB Journal Management System, 35(3), pp. 374-382. doi: 10.21608/asdj.2024.291378.1290
El-Agwany, M., Hamdy, A., Zohdy, M., Mahrous, A., Tawfik, A., Nabih, S. Effect of different materials with different intrapulpal extensions on fracture resistance of endocrown restored molars(Invitro study). EKB Journal Management System, 2024; 35(3): 374-382. doi: 10.21608/asdj.2024.291378.1290

Effect of different materials with different intrapulpal extensions on fracture resistance of endocrown restored molars(Invitro study)

Ain Shams Dental Journal
Volume 35, Issue 3, September 2024, Page 374-382  XML PDF (1.21 MB)
Document Type: Original articles
DOI: 10.21608/asdj.2024.291378.1290
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Authors
Mohamed Aly El-Agwany email orcid 1; Amina Hamdyorcid 2; maged Zohdyorcid 3; Aliaa Mahrousorcid 4; Ahmed Tawfikorcid 5; Soha Nabihorcid 6
1Faculty of dentistry, Fayoum university
2Fixed Prosthodontics,Faculty of dentistry,Ain Shams University
3Fixed prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo Egypt
4Fixed Prosthodontics- Faculty of Dentistry- Fayoum University
5University of Huddersfield
6Fixed Prosthodontics, Ain shams University ,Cairo , EGYPT
Abstract
Aim: This study investigated the fracture resistance of different intrapulpal extensions of endocrowns made of lithium disilicate (L) and polyetheretherketone (P).
Materials and methods: sixty extracted human mandibular first and second molars were split equally into three groups based on the depth of the intrapulpal cavities (0 mm, 2 mm, and 4 mm), and then each group was further separated into two subgroups according to the material of the endocrown (L and P). Fracture resistence was assessed by a computer-controlled testing machine, and then data were collected and analyzed using a two-way ANOVA followed by Tukey’s post hoc test.
Results: For endocrowns fabricated from polyetheretherketone, the fracture resistance values ranged from (2302±101.97 to 3363.22±382.32), which was significantly higher than that of lithium disilicate (1747.16±154.38 to 2756.73±126). The lowest values of fracture resistance for L and P restorations were 1747.16+154 and 2302.92+101, respectively, at 0 mm. depth designs, whereas the values increased to reach their maximum values of 2765.73+126 and 3363.22+382, respectively, at 4 mm depth designs.
Conclusion: The fracture resistance of restorations made of P polyetheretherketone is higher than that of restorations made of lithium disilicate. Increasing intrapulpal cavity depths increases the fracture resistance of endocrowned restoration.
 
Keywords
Lithium disilicate; PEEK; designs
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