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28 I I feature _ interview _The new WaveOne NiTi file system from DENTSPLYMailleferisasingle-use,single-filesystem to shape the root canal completely from start to fin- ish. Drs Julian Webber, Pierre Machtou, Wilhelm Per- tot, Sergio Kuttler, Clifford Ruddle and John West were involved in the development, field testing and research associated with WaveOne. roots had the opportunity to speak to Dr Webber, The Harley Street Centre for Endodontics (London, UK), about the ben- efitsofthesystemandtheresponsesitreceivedfrom visitors during IDS 2011. _roots:Wouldyoubrieflydescribethebenefitsof WaveOnetoourreaders? Dr Julian Webber: WaveOne should initially benefit the many general dental practitioners who while desiring to move away from hand preparation of root canals to a simplified mechanical preparation technique have been reluctant to do so in the past. Dentists who have been reluctant to embrace rotary NiTi for fear of instrument breakage, as well as the excessive number of instruments and costs, will find WaveOne to be the perfect solution. UsingWaveOneissimpleandinvolvesonlyonefile in many cases to shape the canal to length fully. As a single-filetechnique,itisreasonablypricedcompared with a sequence of files to prepare the root canal, which should be very appealing. We are talking about one file to produce a perfectly shaped root canal; and whentherootcanalisperfectlyshaped,wecanirrigate and clean it properly and then fill it properly. _Howexactlydoesthesystemwork? In most cases, the technique only requires one handfilefollowedbyonesingleWaveOnefiletoshape the canal to length. The specially designed NiTi files work in a similar but reverse “balanced force” action, using a pre-programmed motor to move the files back and forth (“reciprocating motion”). The files are manufactured using M-Wire technology, improving strength and resistance to cyclic fatigue by up to nearly four times compared with other brands of rotary NiTi files. There are many dentists who are reluctant to useNiTirotaryinstrumentstopreparecanals,despite the recognised advantages of flexibility, less debris extrusionandimprovedmaintenanceofcanalshape, amongst other advantages. For them, the use of a singlereciprocatingfilewillbeveryattractivebothin terms of time and cost saving. _A general practitioner might get the impression thattheWaveOnesystemmakesrootcanalseasy.Do you think encouraging this view might be cause for concernamongstendodontists? roots2_2011 “WaveOne is a simple system” An interview with Dr Julian Webber, UK Photos: Johannes Eschmann