In vitro evaluation of effects of ultrasonic root-end preparation on resected root surfaces

Modern Endodontic Surgery Concepts and Practice: A Review

“…Min et al (75) suggested the use of cadavers for the results to be more clinically relevant. A study by Gray et al (76) on cadavers reported that the ultrasonic tips did not cause a greater than average number of cracks.…”

Scanning Electron Microscopic Analysis of the Integrity of the Root-end Surface after Root-end Management Using a Piezoelectric Device: A Cadaveric Study

“…The incidence of cracks in the CV groups was independent of the power level. Few studies have investigated the effect of changing the power level on root-end alterations using ultrasonic retrotips, reporting controversial results (1,10,12,24).…”

“…Despite the excellent results obtained with ultrasonic tips, some drawbacks have been associated with this technique (6). Dentinal cracks on the resected root end were shown after retrograde preparation with ultrasonic tips (1,(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22). All these studies showed limitations because the transfer of results obtained with extracted teeth to the clinical practice is difficult.…”

Microleakage Evaluation Around Retrograde Filling Materials Prepared Using Conventional and Ultasonic Techniques

“…For making a cavity preparation in root end we can use various instruments like conventional slow speed handpieces, high speed Airotor handpiece with burs, sonics and ultrasonics. Although ultrasonic tips follow the root canal space better than conventional techniques but have shown to cause more rates of root fractures [7]. The depth of the pereparation ideally should be 3 mm as more than that does not bestow any greater benefits whereas lesser depth may jeopardize the long-term success of the apical seal [8].…”