The Analytic Steps We Took To Assure Non-Distortion and Three-Dimensional Instrumentation

In response to studies that showed rotary NiTi performing better in the non-distortion of curved canals as well as superior debridement I have in recent posts countered with some samples of cross-sectional data, the French study that substantiated superior debridement compared to 3 other rotary systems as well as a video demonstrating the three dimensional cleansing of the mb and ml roots as well as the isthmus space common to both canals. I also commented on the fact that in comparing the 30o oscillating relieved reamers in canal preparation to various rotary systems all the studies included the stiff NiTi files we no longer use as part of the instrumentation sequence rendering results that do not reflect their present day use.

As part of a further response, I believe it is enlightening to show the studies we made on extracted teeth after instrumentation and obturation in determining the degree of debridement and distortion that results from the use of the relieved stainless steel reamers alone. Below are a series of x-rays that we used to evaluate the non-distorting three-dimensional evaluation of their employment. I will be presenting this material in several posts because linkedin appears to allow only 10 images to be uploaded at any one time.

Here is the first installment. Please note the varying angles we took of the prepared canals to evaluate the effectiveness of the 30o oscillating reamers to to cleanse and shape the canals with a minimum of dentin loss. These results met our standards for the development of the design and use of the 30o oscillating reamers. Please realize that my primary requirement was to develop a system that met the needs of my endodontic practice. If they had not, they would have never become a part of our armamentarium.

Regards, Barry