We also thank the importers and manufacturers for providing the obturation
The endodontic treatment aims at accessing the root canal, performing pulpectomy, irrigating the canal, placing of medicament in the canals and, finally, obturation
of the root canal.1,2 In teeth with pulpal necrosis and infected canals, the incidence of pain increases.1 The canal debridement is carried out and intra-canal medicament is added as an adjunct to minimise the inter-appointment pain.2,3 Endodontic treatment is carried out in single or multiple visits.4,5 The multiple-visit treatment targets the elimination of the microbes along with by-products from the canals before obturation
.6 The single visit doesn't give the advantage of placement of an intra-canal medicament between the visits but it has merits of its own.
Within the limitations of the present study apart from the endodontic irrigation needle group, all of the tested methods could be used for obturation
of primary teeth but not perfect and so new technologies and techniques are needed to improve primary root canal fillings.
Comparison of apical sealability of three obturation
techniques (an in vitro study).
Root canal obturation
of the teeth that were not previously endodontically managed was performed immidiately before the surgical procedure or intraoperatively.
EndoREZ[R] (Ultradent Products Inc., USA) is a root canal obturation
system composed of urethane dimethacrylate resin based sealer and methacrylate resin-coated GP cones.
Clinically after the calcium silicate based sealer is applied in the root canal system during canal obturation
, its surface properties can be affected by the periapical tissue environment.
Two main tooth fragments were retrieved from the extraction procedure: a larger one, formed by the crown, post and guttapercha obturation
and a smaller slice with unoccupied root canal space, detached from all the other restorative materials (Figures 10(a) and 10(b)).
Weaker bullets obturate harder against the bore, and obturation
increases as chamber pressure increases.
Then, System B was used for obturation
of the 3 apical millimeters, removing the heat source and conducting vertical compaction with a manual compactor (Machtou's heat-carrier pluggers; Dentsply Maillefer, Ballaigues, Switzerland).
The root canals were obturated with gutta-percha and the AH Plus (Dentsply DeTrey, Konstanz, Germany) root canal sealer using the Calamus 3D Obturation
System (Dentsply Maillefer, Ballaigues, Switzerland) and the warm vertical compaction technique.
Examiner 1 Examiner 2 Examiner 3 n % n % n % Presence of misshapes - 4 3.8 6 5.8 13 12.5 + 5 4.8 4 3.8 10 9.6 = 95 91.3 94 90.4 81 77.9 Obturation
density - 5 4.8 8 7.7 6 5.8 + 9 8.7 20 19.2 11 10.6 = 90 86.5 76 73.1 87 83.7 Obturation
length - 2 1.9 9 8.7 8 7.7 + 10 9.6 20 19.2 9 8.7 = 92 88.5 75 72.1 86 82.7 Periapical lesion - 9 8.7 13 12.5 12 11.5 + 4 3.8 10 9.6 7 6.7 = 91 87.5 81 77.9 85 81.7 Note.