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Endo Tribune Middle East & Africa Edition No. 6, 2016

Dental Tribune International The World’s Largest News and Educational Network in Dentistry Essential Dental Media Dental Tribune Middle East & Africa Edition | 6/2016 endo tribune A3 important step prior to inserting a file and measuring the working length. Next, achieving a glide-path isimportant.IntheMLset,thegreen file .08/25 will usually do most of the work in the canal. It is tempting for the clinician to peck it up/down apicallyallthewaytoworkinglength in one go because the system is effi- cient and therefore in many cases capable of doing so. Avoid doing this and once the file engages den- tin, take it out to clean flutes, irrigate thecanalandremembertomaintain recapitulation. File unwinding is un- likely to occur if the above rule is fol- lowed. However, in rare cases when it does happen, it should serve as a unique cautionary sign before file separation, and as a warning to the operator that the hand pressure ap- plied apically on the handpiece was higherthanadvised. After ML1, the ML2 .06/35 will often go effortlessly straight to working length. This is greatly beneficial for apical enlargement, reduces the risk of file separation. Depending on original canal size/complexity, this is also true when ML3 is needed. Achieving MAF (master apical file) of ML2 (.06/35) also means we can use an EndoVac irrigation system to bet- terdisinfecttherootcanalsystem. After MAF is achieved, I prefer final lateral brushing in the regular “TF Full Rotation Programme Mode” however this can also be done in the “TF Adaptive Mode”. The file will feel minimal torque and therefore brush in interrupted rotation 600-0 de- grees and not reciprocation ecipro- cation. References 1. Hummonen S, Orstavik D. Radio- logical aspect of apical periodontits. EndodTopics2002;1:3-25 2. Yared G. Canal preparation using only one Ni-Ti rotary instrument: preliminary observations. Int Endod J2008;41:339–44. 3. Phase-transformation tempera- turesofTFweresignifi-cantlyhigher than those of machined files, with the bending load values being sig- nificantly lower for these files in the elastic and SE ranges (Hou et al. 2011). Hou XM, Yahata Y, Hayashi Y, Ebihara A, Hanbawa T, Suda H (2011) Phase transformation behavior and bending property of twisted nickel- titanium instruments. International EndodonticJournal44,253–8. 4. Hulsmann M, Peters OA, Dummer PMH (2005) Mechanical preparation of root canals, shaping goals, tech- niques and means. Endodontic Top- ics10,30–76. 5. Bahia MGA, Buono VCL (2005) Decrease in the fatigue resistance of nickel-titanium rotary instruments after clinical use in curved canals. Oral Surgery Oral Medicine Oral Pa- thology Oral Radiology and Endo- dontology100,249–55. 6. Anderson ME, Price JW, Parashos P (2007) Fracture resis- tance of elec- tropolished rotary nickel-titanium endodontic instruments. Journal of Endodontics33,1212–6. 7. Gambarini G, Gerosa R, De Luca M, Garala M, Testarelli L (2008a) Mechanical properties of a new and improved nickel-titanium alloy for endodontic use: an evaluation of file flexibility. Oral Surgery Oral Medi- cine Oral Pathology Oral Radiology andEndodontology105,798–800. 8. Otsuka K, Ren X (2005) Physical metallurgy of Ti-Ni-based shape memory alloy. Progress in Materials Science50,511–678. 9. Burklein, Dr med dent, and Edgar Schafer, Prof Dr med dent. Apically Extruded Debris with Reciprocating Single-File and Full-sequence Rotary Instrumentation Systems Sebastian JOE — Volume 38, Number 6, June 2012850-852 10. G. Gambarini1, R. Gergi2, A. Naaman2, N. Osta2 & D. Al Sudani3. Cyclic fatigue analysis of twisted file rotary NiTi instruments used in re- ciprocating motion. Int Endod Jour- nal20121-5. 11. Vadhana S, SaravanaKarthikeyan B, Nandini S, Velmurugan N. Cyclic fatigue resistance of RaCe and Mtwo rotary files in continuous rotation and reciprocating motion. J Endod 2014;40:995–9.14. 12. Gavini G, Caldeira CL, Akisue E, et al. Resistance to flexural fatigue of Reciproc R25 files under continuous rotation and reciprocating move- ment.JEndod2012;38:684–7.15. 13. Goldberg M, Dahan S, Machtou P. Centering ability and influence of experience when using WaveOne single-file technique in simulated canals.IntJDent2012;2012:206321. 14. Lim YJ, Park SJ, Kim HC, Min KS. Comparison of the centering abil- ity of Wave.One and Reciproc nickel- titanium instruments in simulated curved canals. Restor Dent Endod 2013;38:21–5 15. Marzouk AM, Ghoneim AG. Com- puted tomographic evaluation of ca- nal shape instrumented by different kinematics rotary nickel-titanium systems.JEndod2013;39:906–9. Thecompletelistofreferencesisavail- ablefromthepublisher. Dr. Adi Moran, is a board certified spe- cialist in Endodontics. He works in London in the Harley Street Dental Group and in EndoCare. His practice is exclusively referral based limited to Endodontics. Adi is a ‘key opinion leader’ for Kerr Endodontics. He routinely lectures in Endodontics nation- ally and internationally and has been an ‘associate clinical teacher’ for 5 years at the Faculty of Endodontics, the University ofWarwickinstructingMSccourses. ◊PageA2 TF-Adaptive as a complete system (motor+files) combines superiorfeaturesfromallfrontsofendodonticinstrument science, i.e. file movement kinematics, file shape and met- allurgy, taking us to the next level in perfection of root ca- nal preparation. It gives me confidence to prepare highly curved canals without the fear element of file separation, whileoperatingsomuchquickertheneverbefore. The outcome is enhanced circumferential canal prepara- tion for better irrigation and reduced extruded debris re- latedpostoperativepain.Iabsolutelyloveworkingwithit.

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