Ultradent Katalog

Obturating the root canal is the final step in the endodontic therapy and dictates the success or failure of the treatment. Only if a permanent seal of the canal lumen is achieved can we expect treatment to result in long-term preservation of the tooth.

ENDODONTICS Objectives of an efficient obturation material Courtesy of Prof. Paul Lambrechts Obturating the root canal is the final step in the endodontic therapy and dictates the success or failure of the treatment. Only if a permanent seal of the canal lumen is achieved can we expect treatment to result in long-term preservation of the tooth. A hundred years ago Miller1 summarized the objectives of an efficient obturation material: "Such material has to be biocompatible, volumestable, and provide an effective seal. It should be easy to deliver and ensure complete fill of all canal spaces without any voids. It should be removable in case of retreatment." A modern material, EndoREZ allows us to get as close to an ideal root fill as never before. The material is fast and easy to handle, and its properties are designed to ensure long-term endodontic success. 1 Miller, W.D.: Lehrbuch der konservierenden Zahnheilkunde. Leipzig 1898 Owing to its superior flow and marked hydrophilicity, EndoREZ can penetrate deep into the dentinal tubules. Photomicrographs show thousands of spaghetti-like EndoREZ tags where the surrounding dentin has been chemically dissolved. The bottom picture shows the orifices of the tubules at higher magnification. EndoREZ is capable of penetrating the dentin up to a depth of 1,500µm ! Successful 5-year results A retrospective clinical and radiographical evaluation assessed root canals sealed with EndoREZ at 5 years post treatment. The same canals had been evaluated at 14 and 24 months post treatment. Of 180 patients, 120 responded to the 5-year recall. None of the patients reported clinical symptoms. Teeth with slightly overextended fillings (12.5%) showed resorption of the extruded material. The authors conclude that EndoREZ performed very well as a root canal sealer. Zmener O, Pameijer CH: Clinical and Radiographical Evaluation of a Resin-based Root Canal Sealer: A 5-Year Follow-Up. Journal of Endodontics, June 2007 Biocompatibility Both the biocompatibility and antibacterial effect of EndoREZ were tested in a cell culture study. The results reveal a similar bactericidal activity for EndoREZ urethane-dimethacrylate-based resin sealer as for zinc oxide eugenol (ZOE). EndoREZ also exhibited good biocompatibility compared with ZOE and AH plus. Becce et al.: Biocompatibility of a New Endodontic Sealer. IADR Abstract, June 2003 Microleakage A study assessed the microleakage of root canal sealers: AH 26 and gutta percha (vertical condensation) versus Epiphany and EndoREZ. The results showed that Epiphany and EndoREZ were more efficient in reducing apical microleakage than AH 26 plus gutta percha. Besharati et al.: Radioisotope Microleakage of Resin Root Canal Sealer in Vitro. Abstract. ADEA/AADR/CADR-Meeting, March 2006 Stabilization A study tested the effect of the use of different root canal sealers on the bond strength of adhesive bonded carbon posts. The result showed that the use of a UDMA sealer resulted in very high bond values. Teixeira et al.: Influence of sealers on the bond strength of carbon posts. Abstract. ADEA/AADR/CADR-Meeting, March 2006 Several canal sealers (EndoREZ, AH plus, RoekoSeal, and Epiphany) were tested for toxicity in two cell culture tests. Only EndoREZ proved to be non-toxic in both tests. Lodiene et al.: Toxicity evaluation of root canal sealers in vitro. Int Endod J., Jan. 2008 Prof. Lambrechts states: […] "After EndoRez sealer was driven into the radicular dentinal tubules of a prepared maxillary canal, photomicrographs show thousands of spaghetti-like resin tags. […] If there were any bacteria in these tubules, they would certainly have been entombed in the material." Lambrechts et al: Comment on EndoREZ (Excerpt from: Photoactivated disinfection (PAD): paintball endodontics), ROOTS, 01/2007 The objective of another study was to find out which obturating materials were most effective in stabilizing teeth against longitudinal fractures. The sealers tested were ZOE sealer, EndoREZ, Resilon, and Gutta Flow. The teeth obturated with EndoREZ and Resilon showed a significantly higher vertical root fracture resistance. L Hammad et al.: Effect of New Obturating Materials on Vertical Root Fracture Resistance of Endodontically Treated Teeth. Journal of Endodontics, Juni 2007 Simplified and time-saving This in vitro study assessed two root canal preparation techniques: (1) Instrumentation using stainless steel hand files plus obturation using Sealapex and gutta percha points; (2) instrumentation and obturation using the Endo-Eze AET system. Results: Canal preparation and obturation using the Endo-Eze AET system required only half the time needed with the conventional method, and the rate of microleakage over time was approximately one third lower for canals obturated with EndoREZ vs. the conventional method. Fraunhofer et al.: Microleakage within endodontically treated teeth using a simplified root canal preparation technique: an in vitro study. General Dentistry, Nov./Dec. 2005 87