Evaluation of two different root-end cavity preparation techniques: A scanning electron microscope study

Area of Science:

• Endodontics
• Dental Materials Science
• Biomaterials

Background:

• Root-end cavity preparation is crucial in endodontic surgery.
• Minimizing iatrogenic damage to dentinal walls is essential for successful treatment.
• Different retropreparation techniques may influence crack formation.

Purpose of the Study:

• To compare the incidence of cracks in dentinal walls of root-end cavities prepared with ultrasonic (US) retrotips versus Er: YAG laser.
• To evaluate the effect of these techniques on complete, incomplete, and intradentinal cracks.

Main Methods:

• Fifty single-rooted teeth were prepared and obturated.
• Root ends were resected, and cavities were prepared using US retrotips (n=20), Er: YAG laser (n=20), or no retropreparation (control, n=10).
• Scanning electron microscopy (SEM) was used to examine root-end surfaces for cracks.

Main Results:

• No statistically significant difference was found between the US and Er: YAG laser groups regarding the number of complete, incomplete, intradentinal, or total cracks.
• The P-values for all crack types were greater than 0.05, indicating no significant difference between the groups.

Conclusions:

• The retropreparation technique, whether using US retrotips or Er: YAG laser, has no significant effect on the development of apical cracks.
• Both techniques appear to be safe concerning crack induction in dentinal walls.