In endodontic therapy it is supposed that success in the obturation of root canals depends on how well the root canal is dried just prior to obturation. There are various ways which are commonly used in daily clinics to dry the root canal-wiping or absorbing moisture with paper points, aspirating with instruments, using drying agents together with aspirators, etc.
Its difficult, however, to ascertain the effects of each of these methods. So experiments were performed on these drying methods using root canal models and extracted teeth and discussed.
From the results of the study it was concluded it was impossible to dry the root canals completely using only the paper points but the following method was very effective : First drying agents are applied and then absorbed with paper points or something similar, and finally an aspirator is used to remove residual drying agent.
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