Certified Instrument Specialist (CIS) Practice Exam 2026 - Free CIS Practice Questions and Study Guide

Periotomes are specialized dental instruments designed to sever the periodontal ligament. This function is crucial during tooth extraction procedures, as it allows for a more controlled and less traumatic removal of the tooth from its socket. By cutting through the periodontal ligament, periotomes facilitate the loosening of the tooth, making it easier to extract while minimizing damage to the surrounding bone and tissue.

In contrast, other instruments and processes listed serve different purposes. For instance, cleaning and polishing teeth pertains to restorative dentistry, not extraction. The application of dental cement is related to securing restorations or crowns but does not involve the ligament. Lastly, repositioning dental implants involves tools that place implants into the jawbone rather than severing any ligament. This clearly highlights the primary role of periotomes as essential tools specifically used for managing the periodontal ligament during tooth extractions.