[Comparative study of resosolv and chloroform in retreatment of canal obturated with resinifying agent].
OBJECTIVE
To evaluate the possibility for removal of resinifying agent, time required for removal and the working length loss by Resosolv or Chloroform.


METHODS
40 human teeth (80 root canals) obturated with FR phenolaldehyde agent were divided into four groups, 20 root canals per group. Group A: Resosolv with K file; group B: chloroform with K file; group C: Resosolv with Ultrasonic K file; group D: Chloroform with ultrasonic K file. Calculating the pereentage for removal of resinifying agent, time required for removal and the working length loss.


RESULTS
The effectiveness of Resosolv for removing resinifying agent was better than chloroform. 87.5% of canals could be negotiated by Resosolv; 45% of canals be negotiated by chloroform.


CONCLUSIONS
Resosolv is an effective solvent for canals obturated with resinifying agent.
He
Bing-zhen
BZ
Special Department, School of Stomatology, Peking University, Beijing 100081, China.
Zhang
Cheng-fei
CF
Ding
Rui-yu
RY
Lin
Qiong-guang
QG
D002725:Chloroform / Q000737:chemistry*; D006801:Humans; D019233:Retreatment; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods; D012997:Solvents / Q000737:chemistry*
D012387:Root Canal Filling Materials; D012997:Solvents; D002725:Chloroform