Computed tomographic detection of cracks after liquid nitrogen cryotherapy of root apexes
Este Cryotherapy with liquid nitrogen (N2) has been effective to eliminate microorganisms such as Enterococcus faecalis, but its effects on dental tissues have not yet been well established. This in vitro study evaluated the formation of cracks in root apexes after cryotherapy. Forty uniradicular human teeth were endodonticall treated, resected (apicectomy), retroprepared and submitted to two 60-second freezing cycles with N2.