**7. Methods to remove Gutta Purcha**

• With a warm endodontic instrument and rotary instrument[some times with a chemical agent chloroform].

However warm method is preferred as it will not disturb the apical seal. before removing the G.P. calculate the length of the post to be placed. Make sure the post length equal to height of the anatomic crown or 2\3 the length of the root whichever is longer.

• Do not disturb the apical 4 to 5 mm of the G P. if this is not done the prognosis of the tooth is compromised.

If working length of the tooth is known the length of the post can be easily determined.

Then apply rubber dam to prevent aspiration. Select an condenser large enough to hold heat well, mark it at app length W.L minimum 5 mm and place in canal to soften the G P.


After removing, shape the canal as needed. The purpose is to remove the undercuts and prepare the canal to receive the posts.

posts should not be no more than 1\3 the diameter of the root dimension.
