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ePaper created 2017-06-21, 10:00:36 | version 1.38.0
root canal preparation with NiTi fi les case report | Figs. 5 & 6: Postoperative radiographs, case 1. Fig. 5 Fig. 6 edge of a kitchen knife you use for cutting bread to make bruschetta (Fig. 2). Due to its special material properties, the fi le is virtually unbreakable and pre- destined for dentists who require fast and reliable results using a reduced fi le sequence. With the HyFlex EDM, we were able to prepare the root canal system in the blink of an eye. Access was quickly gained with the HyFlex 25/.12 Orifi ce Opener (Fig. 3). For the main procedure we used only one universal fi le that saved a lot of time during the treatment. For a quick and thor- ough preparation, a size 25 fi le with variable taper was applied in the common single length technique. The shaping took only a couple of min- utes and we were able to navigate the instru- ment swiftly through the canal in a soft pecking mo- tion (Fig. 4). Even when a bit more pressure was put on the fi le it neither blocked nor got stuck in the dentine. To obtain the ideal chemomechanical cleansing we then irrigated the canal several times for a total of at least 30 minutes. Following the classic irrigation protocol, we used intracanal heated sodium hypo- chlorite (Iandolo technique), 17 % EDTA solution chlorite (Iandolo technique), 17 % EDTA solution and 2 % chlorhexidine digluconate solution to re- and 2 % chlorhexidine digluconate solution to re- move all debris and possible irritants from the ca- move all debris and possible irritants from the ca- nal. After eradicating the infection, we dryed the nal. After eradicating the infection, we dryed the canal with the corresponding paper points size 25. canal with the corresponding paper points size 25. The last step was to create a proper seal to prevent The last step was to create a proper seal to prevent microorganisms from reentering the root canal microorganisms from reentering the root canal system and thus protect the root from future system and thus protect the root from future Fig. 8 Fig. 7: Pre-operative radiograph of teeth 45 and 46, case 2. Fig. 8: 3-in-1 obturation material GuttaFlow bioseal. Fig. 9: In vitro comparison of single cone technique (left) to improved 3-D obturation (right). Fig. 7 Fig. 9 roots 2 2017 19