ABO (Reading) 3

Question 1

When reading a panoramic radiograph, ectopic eruption of the maxillary canine is most often associated with which adjacent tooth resorption risk?

Accepted Answer

Lateral incisor roots

Answer

Central incisor crowns

Answer

First molar furcations

Answer

Second premolar apices

Question 2

In ABO case documentation, the term 'interproximal contacts' in the CR-Eval scores what aspect of the finished dentition?

Accepted Answer

Absence of open spaces between adjacent teeth

Answer

Gingival color

Answer

Root parallelism only

Answer

Occlusal plane cant

Question 3

Which Angle classification describes a molar relationship where the mandibular first molar is mesial to the Class I position?

Accepted Answer

Class III

Answer

Class I

Answer

Class II division 1

Answer

Class II division 2

Question 4

Reading a cephalogram, an increased SN-mandibular plane angle typically indicates which facial growth pattern?

Accepted Answer

Hyperdivergent (vertical) growth

Answer

Hypodivergent (horizontal) growth

Answer

No relationship to growth

Answer

Transverse deficiency only

Question 5

In the ABO Discrepancy Index, which factor adds points for the anteroposterior discrepancy of the occlusion?

Accepted Answer

Cephalometric ANB and other AP measures

Answer

Overjet

Answer

Tooth color

Answer

Gingival biotype

Question 6

When interpreting a Bolton analysis, an anterior ratio significantly above 77.2% indicates what?

Accepted Answer

Excess mandibular anterior tooth material

Answer

Excess maxillary anterior tooth material

Answer

Perfect balance

Answer

Missing molars

Question 7

In radiographic reading, a well-defined radiolucency at the root apex of a non-vital tooth most likely represents which lesion?

Accepted Answer

Periapical granuloma or cyst

Answer

Enamel hypoplasia

Answer

Condensing osteitis

Answer

Cemental spur