Effect of different dentin thicknesses between floor of pulp chamber and furcation area, alone or with addition of MTA, on fracture resistance in mandibular molars (An in-vitro study)
Hisham, M., Negm, M., Morsy, D. (2023). Effect of different dentin thicknesses between floor of pulp chamber and furcation area, alone or with addition of MTA, on fracture resistance in mandibular molars (An in-vitro study). EKB Journal Management System, 5(4), 824-830. doi: 10.21608/adjc.2023.208130.1298
Marwa Hisham; Maged Negm; Dina Morsy. "Effect of different dentin thicknesses between floor of pulp chamber and furcation area, alone or with addition of MTA, on fracture resistance in mandibular molars (An in-vitro study)". EKB Journal Management System, 5, 4, 2023, 824-830. doi: 10.21608/adjc.2023.208130.1298
Hisham, M., Negm, M., Morsy, D. (2023). 'Effect of different dentin thicknesses between floor of pulp chamber and furcation area, alone or with addition of MTA, on fracture resistance in mandibular molars (An in-vitro study)', EKB Journal Management System, 5(4), pp. 824-830. doi: 10.21608/adjc.2023.208130.1298
Hisham, M., Negm, M., Morsy, D. Effect of different dentin thicknesses between floor of pulp chamber and furcation area, alone or with addition of MTA, on fracture resistance in mandibular molars (An in-vitro study). EKB Journal Management System, 2023; 5(4): 824-830. doi: 10.21608/adjc.2023.208130.1298

Effect of different dentin thicknesses between floor of pulp chamber and furcation area, alone or with addition of MTA, on fracture resistance in mandibular molars (An in-vitro study)

Advanced Dental Journal
Volume 5, Issue 4, October 2023, Page 824-830  XML PDF (877.25 K)
Document Type: Original Article
DOI: 10.21608/adjc.2023.208130.1298
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Authors
Marwa Hisham email 1; Maged Negm2; Dina Morsy3
1Endodontic Department. Ahram Canadian University. Researcher, Endodontics Department. Cairo University
2Professor of Endodontics, Faculty of Dentistry, Cairo University, Egypt.
3Lecturer in Endodontics, Faculty of Dentistry, Cairo University, Egypt.
Abstract
Aim: This study aimed to compare the effect of different remaining dentin thicknesses, between floor of pulp chamber and furcation area, alone or after addition of MTA layers on fracture resistance of mandibular molars. Materials and methods: Access cavities were performed on fifty human extracted mandibular molars. Teeth were randomly assigned into 3 main groups. Group 1: remaining dentin thickness 2 mm (n=20). Group 2: remaining dentin thickness 1 mm (n=20). Group 3: average dentin thickness 3 mm between the floor of pulp chamber and bifurcation area (n=10). Group 1 and 2 were sub-divided into two equal subgroups (n=10). For group 1: Subgroup (1a): no MTA was added and subgroup (1b): 1 mm of MTA was added. For group 2: Subgroup (2a): no MTA was added and subgroup (2b): 2 mm of MTA was added. Then, a compressive force was applied toward the floor of the cavity causing vertical fracture by using Instron testing machine to determine the remaining dentin thickness behaviour in all groups and their subgroups. Results: There was no significant difference between (G: 1a, 2a and 3) with p-values 0.54, 0.67 and 0.99 respectively. As well as no significant difference between Group 2b and Group 1b with p-value 0.12. Conversely, Group 2b and other groups (Group 3, 1a and 2a), there were statistically significant differences with P-values= 0.05, 0.04 and 0.006, respectively. Conclusion: Addition of a layer of 2 mm thickness of MTA to the floor of pulp chamber significantly increases the fracture resistance at bifurcation area.
Keywords
dentin thickness; MTA; Instron testing machine; endodontically treated teeth; fracture resistance
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