Which tooth has the longest root in the mouth?

The maxillary cuspid, or canine, is recognized for having the longest root in the mouth. This characteristic is significant for several reasons, particularly in dental anatomy and treatment planning. The long root contributes to the stability of the tooth, anchoring it securely in the alveolar bone, which is vital for its function in tearing food. Additionally, the length of the root allows for more extensive periodontal support, making the maxillary canine a crucial tooth in terms of occlusion and aesthetics.

The distinctive morphology of canines, with their pointed cusp and single, elongated root, is designed for their role as cuspids, which primarily function in tearing and holding food. Understanding the anatomy of the maxillary canine, including its root length, is essential for procedures such as extractions, root canal therapy, and implant placements, where root morphology plays a critical role in surgical planning and execution.