أثر موقع الأداة اللبية المكسورة في تدبيرها داخل الأقنية الإنسية الدهليزية المنحنية للأرحاء السفلية : دراسة مخبرية

الملخص EN

Background &Objective: It is to evaluate the effect of separated endodontic instrument's position on the success rate of its management (retrieval or bypassing) in mesiobuccal curved canals of lower molars.

Methods & Material canal.

The sample was divided into: Group I- the instrument was broken before the curve, and Group П- the instrument was broken after the curve.

A straight access was gained to the separated instrument using a modified GG2.

Then, Counter-clockwise drilling around the separated instrument was performed using ultrasonic tips.

If the separated instrument was not retrieved after 45 minutes, by passing was used.

The case was considered successful when the management (retrieval or bypassing) of the separated instrument was done during the defined time without any perforation occurring inside the root.

Statistical data analysis was made using Chi-square test to compare between groups.

Results: The success rate of the management of separated instruments was 88% (68% retrieved, 20% bypass).

Retrieval of separated endodontic instruments was statistically significant between the two groups (p<0.05).

However, no significant difference was found in the management of the separated endodontic instruments between the two groups ( p>0.05) .

Conclusion: Separated instruments, which were positioned before the curve showed higher susceptibility to be retrieved.

While the position of the instrument was not seem to affect its management.