There are various synonyms for the word Perioscope, which is a device used in dentistry to observe the inside of the periodontal pocket. Some of the variations of the device include periodontoscope, periodontal endoscope, periodontal probe and endodontic mirror. The periodontoscope is an instrument used by dental professionals to examine the periodontal regions more effectively. On the other hand, the endodontic mirror is a small, hand-held mirror that is used to get a clear view of the inside of the mouth. Moreover, a periodontal probe is used to measure the depth of the periodontal pocket accurately. It is designed to examine the gum line carefully and find out any underlying dental issues. Some other similar tools that also assist in dental treatment include dental mirrors and dental probes. These tools go a long way in helping dental professionals in assessing dental problems more accurately and efficiently.