7. Cephalometric Analysis

False

(T/F) 1-NA and 1-NB only measure their respective angles

1-NA

1 indicates the maxillary central incisor, in this case the long axis of the maxillary central incisor This measurement helps determine the position of the maxillary incisors in the A-P plane

Tooth

A number written out in a cephalometric measurement abbreviation represents a specific _____ in Palmer notation ARCH DICTATED BY THE ACRONYM CONTAINING A OR B

0-3

ANB accepted white norms are _____

Class II

An angle greater than 3 degrees indicates a _____ tendency for the ANB angle

Class III

An angle less than 0 degrees indicates a _____ tendency for the ANB angle

Decreases

As the MAXILLA is positioned more posteriorly, the angle of SNA _____

ANB

Determines the relationship between the maxilla and the mandible It does not tell you which jaw is at fault, check SNA/SNB!

SN-Go-Gn

Helps determining the angle of the mandible in relation to the cranial base Aids in diagnosing open bite tendencies

1-Go-Gn

Helps to determine the position, inclination, and stability of the mandibular incisors in the bone

1-NA

Identify this measurement

1-NB

Identify this measurement

1-NB

Identify this measurement This measurement helps determine the position of the mandibular incisors in the A-P plane

Excessive

If the SNA norm is 82, a value of 86 would mean the maxilla is more anterior i.e. _____

Reference plane

Cephalometric analyses have a _____ which is typically a "stable" line used for determining measurements

Quantitatively

Cephalometric analysis helps us _____ measure the skeletal relationships of our patients

Deficient

If the SNA norm is 82, a value of 78 would mean the maxilla is more posterior i.e. _____

True

(T/F) 1-NA and 1-NB measure their respective angles along with the millimeter distance from the facial aspect of the incisor back to the NA/NB lines

False

(T/F) Cephalometric analyses are a guide and should be used as a sole method for treatment planning

Slide 32

Slide 32

...

Steiner "Norms" Answer: "..."

S-N

Steiner's Reference Line Represents the anterior cranial base Sella-Naison

SNA

The angle between the lines S-N and N-A measured in degrees Measures the anterior-posterior position of the maxilla in comparison to the facial skeleton

SNB

The angle between the lines S-N and N-B measured in degrees Measures the anterior-posterior position of the mandible in comparison to the facial skeleton

1-1

The angle measured between the long axis of the maxillary central incisor and mandibular central incisor Determines the relationship between the maxillary and mandibular teeth

Class III

What is the skeletal classification? Mandible is set forward to the maxilla in the A-P plane Deficient maxilla? Excessive mandible?

Class II

What is the skeletal classification? The mandible is set backwards from the maxilla in the A-P plane Excessive maxilla? Deficient mandible?

Class I

What is the skeletal classification? The upper and lower jaws are in equal harmony with each other and the cranium

Natural

When taking a cephalometric radiograph the patient should be positioned in the machine in a _____ head position

Class III

With a norm value of 2, the measured ANB value is -2 degrees indicating a _____ skeletal pattern

Class II

With a norm value of 2, the measured ANB value is 6 degrees indicating a _____ skeletal pattern

Wits Analysis

_____ are aimed solely at describing the severity or degree of jaw disharmony