Case series: tooth retention 5 years after irretrievable separation of LightSpeedLSX instruments.

Introduction: Of 3,216 root canals treated endodontically at the Creighton University School of Dentistry from September 1, 2005, to August 31, 2007, with LightSpeedLSX instruments (LightSpeed Technology, Inc, San Antonio, TX), there were 12 cases of irretrievable instrument separation. More than 5 years after the separations, an attempt was made to contact the patients and assess for healing and tooth retention.

Methods: Third- and fourth-year dental students performed root canal procedures according to protocol from September 1, 2005, to August 31, 2007.

Repair of a large furcation perforation: a four-year follow-up.

This case report describes the management of a large furcation perforation in a maxillary first molar. Although the majority of the pulpal floor was destroyed and the mesiobuccal root was damaged, an attempt was made to repair the defect and restore the tooth. An absorbable gelatin sponge matrix was placed, and the defect was repaired with gray ProRoot mineral trioxide aggregate.

An in vitro assessment of the sealing ability of resilon/epiphany using fluid filtration.

The aim of this in vitro study was to compare the sealing ability of Resilon/Epiphany to gutta-percha and Roth or AH Plus sealers. Leakage of the obturated roots was measured using the fluid filtration technique. There were eight groups of 12 teeth each.

Incidence of instrument separation using LightSpeed rotary instruments.

The use of nickel-titanium rotary instrument systems has gained popularity over the past 10 years. One of these instrument systems is the LightSpeed (LightSpeed Technology, Inc, San Antonio, TX). One drawback for all nickel-titanium rotary instruments is the incidence of instrument separation.