Development Story - DT Light Post
In the late 1990’s, a Prosthodontic Professor Dr. Pierre Boudrias and an Endodontic Professor Dr. Salam Sakkal at the University of Montreal decided that it was time for a post that adapts to the realistic contours of the prepared canal, rather than the traditional approach: adapting the canal to fit the post. Collaboration between RTD and these academicians culminated in the introduction of "D.T" or Double-Taper Light-Post.
In order to determine what this anatomically-correct shape should be, root canal treatments were done on 967 extracted teeth, including all tooth categories and using several popular endodontic techniques.
Thousands of measurements were taken at 5mm and 10mm from the apex and at the cemento-enamel junction using the Schick Digital Radiography system. Means, ranges and standard deviations were calculated to define and standardize the diameter and taper for each root of each tooth.
This extensive radiological evaluation universally showed a DOUBLE taper; a narrower taper at the apical third, and an increase in taper moving coronally.
Pursuant to these measurements, RTD furnished many different doubletapered prototype posts for evaluation.
These prototypes were placed in nearly 400 extracted teeth. The teeth were then sectioned saggitally and longitudinally and analyzed for optimal adaptation.
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