pt assessment, diagnosis & planning Flashcards
Which 4 things make up a patient history?
(3 histories + reason)
- Presenting Complaint
- RMH
- Dental History
- Social History
Describe the positioning of the mandible in a Class I skeletal pattern.
Mandible is 2-3mm posterior to the maxilla.
Describe the positioning of the mandible in a Class II skeletal pattern.
Mandible is retruded (backwards displacement; more than 3mm) relative to the maxilla.
Describe the positioning of the mandible in a Class III skeletal pattern.
Mandible is protruded (in front; ≤ 1mm) relative to the maxilla.
Which 2 things are looked at when examining the soft tissues?
- Lips (competency)
- Tongue (any irregular activity which may lead to an anterior open bite)
If irregular activity is noticed in a patient, what might this have caused for the patient?
An anterior open bite.
When assessing the patient, what is a common type of habit which may be present?
Tongue sucking.
When conducting an extraoral assessment, which position should the patient be viewed from?
The side.
When assessing an orthodontic patient, which 2 soft tissue points (A and B) should be looked at?
A - the deepest concavity of the maxilla.
B - the deepest concavity of the mandible.
dip under both lips
Where is the Frankfort plane located?
It is a line from the upper EAM (the tragus) to the lower border for the orbital margin.
What may influence the positioning of dental bases A and B?
Incisors - their proclination or retroclination.
How would the Frankfort Mandibular Plane Angle be assessed?
- By placing 1 hand level with the frankfort plane and the other level with the lower border of the mandible.
- Extrapolate these lines until they cross.
What does the average FMPA measure?
27º +/- 4º
Where does the FMPA commonly decussate?
At the back of the head.
If the patient has an increased FMPA, where would the 2 lines meet?
Before the back of the head.
If the patient has a decreased FMPA, where would it the lines be expected to decussate?
Beyond the back of the head.
Describe where the facial thirds are.
1 - From trichion (hairline) to glabella (eyebrows).
2 - Glabella to subnasale (bottom of nose).
- Subnasale to Gnathion (chin).
Describe the size distribution of the facial thirds.
They should all be equal.