Background. The present study was undertaken to evaluate the incidence of dentinal cracks during root canal preparation
with different periodontal ligament simulating materials in vitro.
Methods. Seventy freshly extracted human mandibular first premolars were selected and divided into 7 groups in terms of
simulating material: group 1: polyether impression material; group 2: polyvinyl acetate adhesive; group 3: polyvinyl siloxane
impression material; group 4: cyanoacrylate adhesive; group 5: epoxy resin adhesive; group 6: positive control, without any
periodontal ligament simulation; and group 7: negative control, where neither a periodontal ligament simulating material was
used nor canal preparation was carried out. Root canal preparation was carried out in all the groups followed by sectioning of
roots at 3 mm, 6 mm and 9 mm. The sections were evaluated under a stereomicroscope at ×2.5 for the presence or absence of
cracks. Chi-squared test was used to compare the appearance of defective roots between the different experimental groups.
Results. The least number of cracks were found in the negative control group, followed by group 1 where polyether impression
material was used for periodontal ligament simulation. The difference was significant with a P-value of 0.002 for coronal
sections.
Conclusion. Under the limitation of the present study, polyether and polyvinyl siloxane (light body) can both be used for
simulation of periodontal ligament.
The aim of this article was to showcase the endodontic management of a maxillary first molar with an unusual crown and root anatomy. Clinical diagnosis of the roots and root canal configuration was confirmed by a cone-beam computed tomography (CBCT) and the detection of the canals was made using a dental operating microscope. CBCT images revealed the presence of 5 roots with Vertucci type I canal configuration in all, except, in the middle root which had 2 canals with type IV configuration. The 6 canal orifices were clinically visualized under the dental operating microscope. Clinicians should familiarize themselves with the latest technologies to get additional information in endodontic practice in order to enhance the outcomes of endodontic therapy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.