In Vitro Comparison Of The Obturation Density By Three Techniques

Background Pulposis and periapical diseases are common diseases andoccur frequently in people. The root canal therapy is the only completelyeffective treatment method presently. Root canal therapy is a method oftreating Pulposis and periapical diseases with the help of periapical tissueswhich are characterized by abundant blood flow and strong ability of repairand regeneration. It can eliminate the stimulation from root canal by followingsteps: preparation, disinfection and obturation of the root canal. Main purposeof the treatment is to cure the teeth with Pulposis or periapical diseases. Thefunction of root canal filling, which is one of the major steps of root canaltherapy, is to obturate the root canal that has been prepared and eliminate allportals of entry between the root canal and periodontium or oral cavity. Theobturation is the last and all important step of the root canal therapy. Theobturation will influence on the result of treatment directly. The lateralcondensation is the most frequently used technique of obturation, but it hasmuch limitation and disadvantage and can't adapt complicated the change ofroot canal. In order to overcome these shortcomings and improve obturationquality, the obturation techniques of warm gutta-percha emerge as the timerequire. These techniques have many advantages, such as good adaptation toroot canal walls, three-dimensional obturation, time-saving and easy operation, relatively wide indication and good development prospect.Objective The purpose of this in vitro study was to compare quantitativelythe density of cold lateral gutta-percha compaction, E-Q 3D obturation byusing the continous wave of condensation technique and obtura-II obturationby using the high-temperation thermoplasticized injectable technique.Methods Sixty transparent acrylic blocks with 30 degree, curved root canalswere instrumented using the ProTaper Nickel-Titanium hand-files in acrown-down manner and equally divided into three groups. During roorcanal preparation every canal was rinsed with distilled water. The canals werethen obturated with gutta-percha without sealer. Group A was obturated withstandard cold lateral condensation. Group B was obturated with E-Q system.Group C was obturated with the Obtura-II system. The blocks were weighedafter the initial canal preparation and after each obturation treatment. Datawere collected and analyzed using analysis of variance at the 5%significance level.Results The weight of group A and B were obviously higher than the weightof group C (P<0.05). There were not significantly difference of the weightbetween group A and B (P>0.05).Conclusion1 E-Q system and Obtura-II system have much more advantage in densitythan standard cold lateral condensation technique.2 The increase in density between E-Q system and Obtura-II system isbasically equal.