HOSA Dental Terminology Practice

The correct answer identifies the marginal ridges located primarily on the lingual surfaces of incisors and canines. Marginal ridges are an important anatomical feature in dental anatomy, serving as elevated borders located along the mesial and distal edges of the occlusal surfaces of posterior teeth and the lingual surfaces of anterior teeth, specifically incisors and canines.

In the context of the lingual surfaces of incisors and canines, these marginal ridges play a critical role in the overall form and function of the teeth. They help in the proper alignment and occlusion, providing guidance during mastication and contributing to the stability of the dental arch.

Regarding the other options: the mesial surfaces of all teeth do not exhibit marginal ridges as described for the specified area since mesial surfaces are flat and not elevated like the lingual surfaces. While lingual surfaces could imply a broader area, the option specifying "only" would inaccurately limit the definition of marginal ridges. The facial margins of canines and premolars do not have marginal ridges as defined, considering they are not located where marginal ridges are typically identified.

Understanding the anatomy of the marginal ridges helps in various dental practices, including cavity preparations and restorations, where