Related Experiment Videos
Evaluation of root-end cavity preparation using ultrasonic retrotips
H Ishikawa1, N Sawada, C Kobayashi
1Pulp Biology and Endodontics, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. h-ishikawa.endo@tmd.ac.jp
International Endodontic Journal
|September 3, 2003
Summary
Diamond-coated ultrasonic retrotips (DC) prepared root-end cavities significantly faster than zirconium nitride-coated (KiS) or stainless steel (CT-5) tips. No differences were found in microcracks or dye penetration, indicating comparable sealing quality.
Area of Science:
- Endodontics
- Dental Materials Science
- Surgical Technology
Background:
- Root-end cavity preparation is crucial for successful apical surgery.
- Ultrasonic retrotips offer precision in preparing root-end cavities.
- Evaluating different retip coatings can optimize procedural efficiency and outcomes.
Purpose of the Study:
- To compare the efficiency of diamond-coated (DC) and zirconium nitride-coated (KiS) ultrasonic retrotips against a standard stainless steel tip (CT-5) for root-end cavity preparation.
- To assess the impact of these retips on microcrack formation and dentinal tubule exposure.
- To evaluate the sealing efficacy of root-end fillings prepared with these different retips.
Main Methods:
- Eighty-five extracted single-rooted teeth underwent root canal filling and apical resection.
- Root-end cavities were prepared using KiS, CT-5, or DC ultrasonic retrotips.
- Scanning electron microscopy (SEM) evaluated microcracks and dentinal tubule openings.
- Dye penetration tests assessed the sealing ability of Super EBA fillings after 7 days.
Main Results:
- Diamond-coated (DC) retips significantly reduced preparation time compared to KiS and CT-5 retips (P<0.01).
- No significant differences were observed in the number of microcracks or dentinal tubule openings among the three retip groups.
- Dye penetration analysis showed no significant difference in sealing efficacy between the KiS, CT-5, and DC retip groups.
Conclusions:
- Diamond-coated ultrasonic retrotips offer a time-efficient advantage for root-end cavity preparation.
- The choice of retip coating (diamond, zirconium nitride, or stainless steel) did not significantly affect the incidence of microcracks or the sealing quality of the root-end filling.
- These findings suggest that DC retips can enhance procedural efficiency without compromising the quality of the root-end preparation or the seal.