Dr. Jean Philippe Mallet, a famous endodontist from Paris, France, visited the Namodajia campus of the Riyadh Colleges of Dentistry and Pharmacy last 05 May 2011 and gave a lecture to some faculty members and students of the College of Dentistry. Dr. Mallet, who is currently the President of the French Endodontic Society (FSE), spoke on the topic “After 15 years of Ni Ti in endodontics, new approaches of design for better cleaning and shaping”. Earlier that same day, Dr. Mallet gave the same lecture to participants of a seminar held at the Al Shimezi Hospital and which was jointly sponsored by the Saudi Endodontic Society and the Cigalah Group Dental Division.
Dr. Mallet discussed the clinical application of a range of endodontic Ni Ti (nickel titanium) instruments and sequence called Revo-S which has been specially developed to be able to simultaneously address the biological requirements (working, cleaning and effective obduration) and ergonomics ( simplification and safety) which are deemed essential to the success of any type of initial endodontic treatment.
At present, Dr. Mallet is a Teaching Associate at the University of Toulouse in France. He was formerly a Teaching Assistant at the Paris V University. His research works and publications cover endodontics biomaterials; root canal treatment, apical surgery; perforation and resorption treatment; the use of the NiTi rotary system and micro dentistry and endodontics, in general.
The last decade has seen several generations of Nickel Titanium (Ni Ti) rotary instruments which have been very helpful in negotiating curved canals and creating tapered preparations. There are numerous rotary systems from different manufacturers. Although some design features vary, in essence they all do the same thing. The only one that is different is from Lightspeed.
Lightspeed files are designed to instrument at the apex, which is really the most important part of the root canal system. Its unique design makes it very flexible and prevents binding the canal walls anywhere but at the apex. That allows Lightspeed files to safely enlarge the apical diameter. Since apical foramen is almost never round and often has the narrow diameter of #20 file or larger, traditional instrumentation does not allow for proper cleaning of the apex. By enlarging the foramina to encompass both narrow and wide diameters, most of the apical bacteria and their byproducts are eliminated.
Titanium is a metal that NASA uses to make spacecraft and the Soviets used titanium to make nuclear submarines. It’s a special metal that is stronger than steel and is very light. Titanium is also extremely flexible. It can bend into very unusual shapes and return to it’s original shape without any permanent distortion.
One of the major problems of the old stainless steel root canal files was that they could not always bend to the shapes of all root canals. The old files would sometimes cut their own pathway out of the sides of teeth. The result was often a lost tooth.
Titanium files easily bend to the strange shapes of root canals. They are really strong and don’t break as easily as the old stainless steel root canal files.


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