Final answer:
The longest teeth in human dentition are the canines, which are considered longest due to their extended root structure. They are essential for tearing food. The maxillary canines are typically slightly longer than the mandibular canines.
Step-by-step explanation:
The longest teeth in human dentition are the canines, also known as cuspids. They are considered the longest due to their elongated root structure that extends deeper into the jawbone compared to other teeth. Comparing the maxillary (upper) and mandibular (lower) canines, it's typical to find that the maxillary canines are slightly longer due to the larger size of the upper jaw and its bone structure. The canines play a crucial role in our ability to tear food, and in maintaining the arch form and occlusal stability.
Permanent teeth, including the canines, usually start replacing deciduous teeth between the ages of 6 and 12. Wisdom teeth, which are molars, generally emerge in early adulthood, and in some cases become impacted, necessitating orthodontic surgery to remove them. Molars, especially the third set, referred to as wisdom teeth, are the largest in the dentition but not the longest. It's important to note that each type of tooth has a specific function related to its shape and position within the mouth, as evidenced by the roles of incisors for biting, canines for tearing, premolars for mashing, and molars for crushing food.