الفهرس 
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Abstract
During the current research was to prepare 60 root canal of the tooth sixth lower by cooler Felix and cooler Canal Master and Mbrdnichael Taitniom in order to compare the effect of each of them on the curvature and the movement of the top of the root canal and the cleanliness of the root canal , as well as their influence on the matching filler on the wall of a root canal .
Has been calculated the resulting change in the angle of the curve by measuring the angle of parts before and after preparation using a specialized computer program , which also used to calculate the extent of movement of the top of the root canal .
Was rated the cleanliness of the root canal in the 30 root by الميكرسكوب - mail scanner , as well as examine the matching filler after stuffing 30 root dye in a manner transparent and make the teeth then examined under الميكرسكوب the surround leakage measurement of the on the root summit .
The results were analyzed statistically to determine the degree of moral , have found significant differences between the change in the curve resulting from the use of the three files and clinical reasons it is also found that less change in bending may record with a nickel- titanium cooler .
Hand side there were no significant differences between the change in the curve resulting from the use of the three files.
Hand cleaner found the root of the covering layer ivory pipe in all the samples that have been prepared by the three files , as well as at all levels and also found the remains in the nerve prepare Kchtlfah of samples for the three files and focused mostly in oral Jizzi .
For the three rasps impact on matching filler there were no significant differences between القممي leakage between the three files from both clinical and side effects.
* from the previous study concluded the following:
1. Found that the cooler nickel Taitniom , is the best cooler in the preparation of the root canal less change in curvature of the channel compared BIM file Filx the - R cooled Master Alknal .
2. Although the design of mutated to file Alknal Master it leads to a change in the relatively root canal curvature middle curve 3. It also found that the change in the curve of the clinical side should be avoided more than the side because the bending angle is greater than the clinical side .