**Question:** In Peck and Peck index, mesiodistal and buccolingual measurements of which tooth are taken:

A. Incisors
B. Premolars
C. Molars
D. Canines

**Correct Answer:**

**Core Concept:**
The Peck and Peck index is a dental diagnostic tool used to assess the occlusal relationship between teeth in the maxillary and mandibular arches. It involves measuring the mesiodistal and buccolingual dimensions of teeth to determine the occlusal relationship and alignment.

**Why the Correct Answer is Right:**
In the Peck and Peck index, measurements of both mesiodistal and buccolingual dimensions are taken for the teeth. Dentists typically use these measurements to evaluate the occlusal relationship between teeth and determine the alignment. This helps in diagnosis and treatment planning for various dental procedures such as orthodontic treatment, restorative treatment, and prosthodontic treatment.

**Why Each Wrong Option is Incorrect:**

A. Incisors (Dogs): While incisors can be involved in the occlusal relationship, they are not the primary focus of the Peck and Peck index. The index primarily focuses on the molars, premolars, and canines.

B. Premolars: Similar to incisors, premolars are not the main target of the Peck and Peck index. The index focuses on assessing molars, premolars, and canines.

C. Molars: Molars, along with premolars and canines, are the primary teeth considered in the Peck and Peck index when assessing the occlusal relationship and alignment.

D. Canines: Canines, like premolars and incisors, are part of the teeth considered in the Peck and Peck index for occlusal relationship analysis.

**Core Concept (repeated):**
The Peck and Peck index involves measuring the mesiodistal and buccolingual dimensions of teeth to assess the occlusal relationship and alignment. The index considers various teeth, including incisors, premolars, molars, and canines, in order to evaluate the occlusal relationship.

**Why Each Wrong Option is Incorrect:**

A. Incisors: While incisors contribute to occlusal relationship, they are not the primary focus of the Peck and Peck index. The index primarily assesses other teeth, such as molars, premolars, and canines.

B. Premolars: Similar to incisors, premolars are not the main target of the Peck and Peck index. The index primarily examines molars, premolars, and canines to assess occlusal relationship.

C. Molars: As mentioned, molars, along with premolars and canines, are the primary teeth considered in the Peck and Peck index for occlusal relationship analysis.

D. Canines: Canines, like incisors and premolars, are part of the teeth evaluated in the Peck and Peck index to assess the occlusal relationship.

**Why the Correct Answ