Follow up studies

* Combinations of a special technique with a particular material have often been tested in large,
retrospective follow-up studies.
* Castagnola tested Kri Paste with iodoform in 1000 cases.
* Strindberg tested rosin-chloroform in several hundred teeth and set the standard for conventional
success-failure analyses.
* Grossman’s sealer, Kloroperka NØ, eucapercha and Sealapex have been tested in separate studies.