The aim of the present study was to compare the sealing ability of zinc-oxide sealer and resin-based sealer (EndoREZ®) using two different root canal filling techniques, the cold lateral condensation and the single cone technique. Forty-five root canals of human incisors, canines and premolars were selected and prepared using RaCe rotary files (FKG, La Chaux-de-Fonds, Switzerland). The specimens were randomly divided into 3 groups (n = 15). The first group received a root filling using cold lateral condensation of gutta-percha cones and zinc-oxide eugenol-based sealer. In the second group, root canals were filled using EndoREZ® single cone technique and EndoREZ® sealer (Ultradent Inc., South Jordan, UT). The third group received a root filling by cold lateral condensation of EndoREZ® points (Ultradent Inc., South Jordan, UT) and EndoREZ® sealer (Ultradent Inc., South Jordan, UT). Two layers of nail polish were applied to the tooth surface, except for the apical 2 mm. After decalcification with nitric acid and clarification, the sealing ability was evaluated by measuring the dye penetration along the canal walls. The zinc-oxyde eugenol-based sealer and the gutta-percha core combination showed higher sealing ability than the EndoREZ® sealer and the gutta-percha core combination. The lateral condensation with EndoREZ® exhibited more sealing ability than the single-cone technique.
The absence of an apical constriction and the divergent apical architecture of the root canal hamper complete debridement, canal disinfection and obturation. In the past, calcium hydroxide was currently used to create a root-end barrier, but there are some disadvantages. Since its invention, the MTA has been popularized in endodontic because of its excellent properties. This article presents a detailed case report of the use of a collagenic matrix prior to placement of MTA as an apical barrier and a second case without the use of the matrix.
Cutaneous sinus tracts of dental origin are often initially misdiagnosed and inappropriately treated because of their uncommon occurrence and the absence of symptoms in approximately half the individuals affected. This paper reports a case describing the diagnosis and treatment of an extra-oral cutaneous sinus tract of odontogenic origin in relation to a mandibular left first molar. Non-surgical endodontic treatment was performed, and it resulted in resolution of the sinus tract and promoted periapical healing of the tooth involved.
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