ABO Orthodontic Diagnosis and Treatment Planning 5

Question 1

Cervical vertebral maturation (CVM) staging on a cephalogram is used to assess:

Accepted Answer

Skeletal maturity and growth timing

Answer

Tooth size discrepancy

Answer

Airway patency

Answer

Periodontal status

Question 2

In a patient with a transverse maxillary deficiency and bilateral posterior crossbite, the treatment of choice is often:

Accepted Answer

Maxillary expansion

Answer

Extraction of first premolars

Answer

Mandibular setback surgery

Answer

Anterior bite plate

Question 3

The interincisal angle is formed between the long axes of the:

Accepted Answer

Maxillary and mandibular incisors

Answer

Maxillary incisor and occlusal plane

Answer

Mandibular incisor and mandibular plane

Answer

Two central incisors of the same arch

Question 4

A patient reports clicking and limited opening; treatment planning should include evaluation of:

Accepted Answer

Temporomandibular joint status before active mechanics

Answer

Immediate extraction

Answer

Only cosmetic bonding

Answer

Retention appliance selection first

Question 5

Which of the following most increases the risk of external apical root resorption during treatment?

Accepted Answer

Prolonged heavy forces and long treatment duration

Answer

Short treatment with light forces

Answer

Use of removable retainers

Answer

Regular oral hygiene

Question 6

The primary goal of retention after active orthodontic treatment is to:

Accepted Answer

Maintain corrected tooth positions and allow tissue reorganization

Answer

Continue moving teeth

Answer

Expand the arches further

Answer

Increase overjet

Question 7

When planning treatment for a congenitally missing maxillary lateral incisor, the two main options are:

Accepted Answer

Space closure with canine substitution or space opening for a prosthesis

Answer

Extraction of all incisors

Answer

Immediate implant in a growing child

Answer

Ignoring the space entirely