Oral Anatomy and Physiology I - Incisors

These flashcards cover key concepts from the lecture on incisors, focusing on their anatomy, features, and clinical relevance.

What are the number of incisors present in the permanent dentition?

There are eight incisors, four in each dental arch.

What are the common traits of all permanent incisors?

They have a characteristic shape and function that includes traits such as being aligned in a smooth curve and having a long crown.

What differentiates permanent maxillary incisors from mandibular incisors?

Maxillary incisors are generally larger in size and have more prominent lingual surface features compared to mandibular incisors.

What is the morphology of a typical permanent incisor?

A typical permanent incisor has a long crown with an incisal ridge, a triangular outline from the proximal view, and a cingulum on the lingual surface.

At what approximate ages do the maxillary central incisors erupt and complete root formation?

They erupt between 7 to 8 years, with root completion by age 10.

What is a characteristic feature of the lingual surfaces of all anterior teeth?

They have a cingulum, a rounded area on the cervical third of the lingual surface.

What unique feature do permanent incisors have regarding their incisal angles?

They are the only permanent teeth with two incisal angles formed from the incisal ridge and each proximal surface.

What is a Dens in Dente?

It is a condition where a tooth is situated within another tooth, most commonly seen in maxillary lateral incisors.

What is localized enamel hypoplasia and its possible cause?

It is a defect in enamel formation often associated with congenital syphilis, leading to abnormalities in the shape of incisors.

What are the key features of the maxillary central incisors?

They erupt between 7 and 8 years of age, have a single conical root, and the widest crown mesiodistally of any permanent anterior tooth.

How does the shape of a mandibular incisor differ from its maxillary counterpart?

Mandibular incisors are smaller, more symmetrical, and have less pronounced lingual features compared to maxillary incisors.

What does attrition mean in dental terms?

Attrition is the wearing away of a tooth surface caused by tooth-to-tooth contact.

What are peg laterals?

Peg laterals refer to a condition where the lateral incisor is smaller and resembles a peg due to partial microdontia.

What is a mesiodens?

A supernumerary tooth located between the two maxillary central incisors.

What is a common dental issue related to the lingual surfaces of mandibular incisors?

The grooves on their lingual surface may retain dental biofilm, promoting potential dental issues.

What can lead to diastema between incisors?

It can occur as an open contact between the maxillary central incisors, often perceived as unattractive by some patients.

What is significant about the roots of maxillary incisors?

The roots are typically short with minimal concavities, and the crowns may create deep concavities at the CEJ.