Fracture resistance of simulated immature teeth treated with a regenerative endodontic protocol

Mohamed Raouf W. Ali; Manal Mustafa; Asgeir Bårdsen; Athanasia Bletsa

doi:10.1080/23337931.2019.1570822

Authors

Mohamed Raouf W. Ali Department of Clinical Dentistry Faculty of Medicine, University of Bergen, Bergen, Norway
Manal Mustafa Oral Health Centre of Expertise in Western Norway, Bergen, Norway
Asgeir Bårdsen Department of Clinical Dentistry Faculty of Medicine, University of Bergen, Bergen, Norway
Athanasia Bletsa Department of Clinical Dentistry Faculty of Medicine, University of Bergen, Bergen, Norway; Oral Health Centre of Expertise in Western Norway, Bergen, Norway

DOI:

https://doi.org/10.1080/23337931.2019.1570822

Keywords:

Fracture resistance, MTA, Biodentine, TotalFill, bovine teeth

Abstract

This study aims to evaluate fracture resistance of simulated immature teeth after treatment with regenerative endodontic procedure (REP) using tricalcium silicate cements (TSCs) as cervical plugs. Bovine incisors were sectioned to standard crown/root ratio. Pulp tissue was removed and canals were enlarged to a standardized diameter. Teeth were then treated with a REP protocol consisting of NaOCl and EDTA irrigation, intracanal medication with triple-antibiotic paste for 14 days followed by a TSC cervical seal and composite restoration. Teeth were divided into groups according to the material used; Mineral-Trioxide-Aggregate (MTA), Biodentine, TotalFill. Teeth filled with guttapercha (GP) and intact teeth served as controls. All teeth subjected to an increasing compressive force (rate of 0.05 mm/s at a 45° angle to the long axis of the tooth) until fracture. All treated teeth exhibited significantly lower resistance to fracture compared to the intact teeth but no difference was found between the TSC groups (Kruskal-Wallis, Dunn’s multiple comparison, p < .05). TSCs applied at the cervical area of simulated immature teeth treated with REP did not reinforce fracture resistance.