The sharp cusp like eminence found on the lingual surface in the cingulum region of permanent maxillary canine is known as:
**Core Concept**
The question is testing the student's knowledge of the anatomy of the permanent maxillary canine. Specifically, it is asking about a characteristic feature of this tooth, namely a sharp cusp-like eminence found on the lingual surface in the cingulum region.
**Why the Correct Answer is Right**
The cingulum is a small elevation on the lingual surface of the maxillary canine, located in the cingulum region. This region is characterized by a sharp cusp-like eminence, known as the cingulum tubercle or the cingulum eminence. This feature is a distinctive characteristic of the permanent maxillary canine and is used in the identification of this tooth in dental anatomy.
**Why Each Wrong Option is Incorrect**
**Option A:** is incorrect because it does not describe a feature of the maxillary canine. The oblique ridge is a feature of the mandibular molar teeth.
**Option B:** is incorrect because it does not describe a feature of the cingulum region of the maxillary canine. The cingulum is a small elevation on the lingual surface of the maxillary canine, not a groove.
**Option C:** is incorrect because it does not describe a feature of the maxillary canine. The cingulum is not a characteristic of the mandibular canine.
**Clinical Pearl / High-Yield Fact**
The cingulum tubercle or cingulum eminence is a distinctive feature of the permanent maxillary canine that can be used in the identification of this tooth in dental anatomy. It is a small, sharp cusp-like eminence located on the lingual surface of the tooth in the cingulum region.
**Correct Answer:** C.