ABO Orthodontic Diagnosis and Treatment Planning

Question 1

What is a cephalometric analysis used for in orthodontics?

Accepted Answer

Analyzing skeletal and dental relationships using standardized lateral skull radiographs to plan treatment

Answer

Cephalometric analysis uses standardized lateral head radiographs with specific landmarks and measurements to evaluate skeletal relationships, dental positions, and soft tissue profiles for diagnosis and treatment planning.

Question 2

What is Angle's classification of malocclusion?

Accepted Answer

A system classifying bite relationships based on the mesiobuccal cusp of the upper first molar relative to the lower first molar: Class I, II (Div 1&2), and III

Answer

Angle's classification defines Class I (normal molar relationship with dental crowding), Class II Division 1 (upper molars forward, protrusive incisors), Class II Division 2 (retroclined incisors), and Class III (lower molars forward).

Question 3

What records are required for a comprehensive orthodontic diagnosis?

Accepted Answer

Panoramic and cephalometric radiographs, dental models/scans, intraoral and extraoral photographs, and patient history

Answer

Comprehensive orthodontic records include panoramic radiograph, lateral cephalometric radiograph, dental study models or digital scans, intraoral photos, extraoral photos, and medical/dental history.

Question 4

What is the discrepancy index in ABO case assessment?

Accepted Answer

A scoring system measuring the complexity of a malocclusion based on multiple criteria including overjet, overbite, crowding, and skeletal pattern

Answer

The ABO Discrepancy Index quantifies malocclusion complexity by scoring criteria including overjet, overbite, anterior open bite, crowding, occlusal relationships, lingual posterior crossbite, and cephalometric measurements.

Question 5

What factors are considered when deciding between extraction and non-extraction orthodontic treatment?

Accepted Answer

Crowding severity, facial profile, lip position, skeletal pattern, age, and anchorage requirements

Answer

Extraction decisions consider arch length discrepancy, facial profile and lip position, skeletal pattern, growth potential, anchorage requirements, periodontal status, and treatment objectives.

American Board of Orthodontics (ABO) Practice Test

American Board of Orthodontics (ABO) Practice Test

ABO Orthodontic Diagnosis and Treatment Planning