الفهرس 
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Abstract
This research was conducted on 60 patients were selected on the basis that they suffer from the failure of treatment of the roots may decide to hold re- treat the roots of these cases , and took all by a computer program scan these patients were divided into two groups
Group A: re- treatment of traditional roots :
Include the number of 30 cases has the stuffing is not enough roots .
After removing the old padding and took bacteria samples from the root canal and then develop coronary padding .
Group II : Return of the surgical treatment of the roots :
The number includes 30 working hard case for re- treatment of her traditional roots , or that if you had this treatment , the results may not be guaranteed.
Follow-up periods :
Cases were followed clinically and Aaaaa at 3,6,12 months of a treatment.
The study found the following results:
1 - re- treatment of the traditional roots :
Has been reached to isolate the number of 34 microbe fall under the 12 species of bacteria were separated from the 27 years of the thirty while in Sinan is not reached to the presence of microbes.
The findings of clinical cases to the success of 80% of the cases and the failure of 20 % of the cases , while radiological findings follow - up to the success of 56.7 % of cases , while the 23.3 % of the cases of non - specific .
2 - Ntaú the Treatment of surgical radicals :
Reached the results of genetic engineering that the microbe bacteria cluster gold had been found by 70 % of cases of surgical treatment of the roots .
We have reached clinical follow-up of cases to the success of 70 % of the cases and the failure of 30 % of cases , whereas radiological follow-up reached a successful 46.7 % of the cases and the failure of 20 % of the cases while the 33.3 % of the cases of non - specific .