WaveOne NiTi file from Dentsply Maillefer is a single-use, single-file system to shape the root canal completely from start to finish. Shaping the root canal to a continuously tapering funnel shape not only fulfills the biological requirements for adequate irrigation to clean the root canal system of all bacteria, bacterial by-products and pulp tissue but also provides the perfect shape for three dimensional obturation with gutta percha.  The specially designed NiTi files work in a similar but reverse ‘balanced force’ action using a preprogrammed motor to move the files in a back and forth ‘reciprocal action’. The files are manufactured with M-Wire technology improving strength and resistance to cyclic fatigue by up to nearly four times in comparison with other brands of rotary NiTi files. It is manufactured based on M-Wire technology improving strength and resistance to cyclic fatigue by up to nearly four times.  

There are three files in the WaveOne single-file reciprocating system which are available in lengths of 21, 25 and 31mm: 

• The WaveOne Small file is used in fine canals. The tip size is ISO 21 with a continuous taper of 6%. 
• The WaveOne Primary file is used in the majority of canals. The tip size is ISO 25 with an apical taper of 8% that reduces towards the coronal end.
• The WaveOne Large file is used in large canals. The tip size is ISO 40 with an apical taper of 8% that reduces towards the coronal end.  

WaveOne technique involves the following stages: 

• Straightline access, accepted protocol  
• WaveOne file selection  
• Single-file shaping 
• Copious irrigation with 5% NaOCl and EDTA before,during and after single-file shaping.  

The plastic color coding in the handle deforms if sterilized. 

The advantages of WaveOne files includes:

• Improve flexibility.  
• Conserve remaining dentin in the coronal two-thirds of the finished preparation. 
• File safely progress through virtually any secured canal. 

The WaveOne Gold system is a single-file and single-use technique. There are 4 WaveOne Gold files available in various lengths. This advancement provides excellent safety, effortless efficiency, and super simplicity, beyond the orginal WaveOne system. The 4 files are termed Small (yellow 20/07), Primary (red 25/07), Medium (green 35/06), and Large (black 45/05). 

 Article by Dr. Siri P. B.