Patient Assessment Flashcards
What are the measurements for crowding severity?
Mild = 2-4mm Moderate = 4-8mm Severe = 8+ mm
What is a skeletal class I?
The mandible is posterior to the maxilla by 2-3mm
What is a skeletal class II?
The mandible is retruded relative to the maxilla
What is a skeletal class III?
The mandible is protruded relative to the maxilla
What is a class I incisor relationship?
The lower incisal edge occludes on or just below the cingulum plateau of the upper incisors
What is a class II division 1 incisor relationship?
The incisal edge of the lower incisors occludes posterior to the cingulum plateau of the upper incisors- the upper incisors are proclined or of normal inclination
What is a class II division 2 incisor relationship?
The incisal edge of the lower incisors occludes posterior to the cingulum plateau of the upper incisors- the upper incisors are retroclined
What is a class III incisor relationship?
The incisal edge of the lower incisors occludes anterior to the cingulum plateau of the upper incisors
What is the kettles method?
The use of the middle finger and forefinger to palate the skeletal bases of the A&B points. The patients head must be in natural head position • if the wrist goes up the patient is class III • if the wrist goes down the patient is class II
How does a patient get into natural head position?
Look at their own eyes in a mirror or look at a point in the distance
What are Andrew’s 6 keys?
- Correct molar relationship
- Correct crown angulation
- Correct crown inclination
- Flat curve of spee
- No rotations
- No spaces
7th added - correct tooth size
What are the 3 planes of space?
- antero posterior = front to back
- vertical = up and down
- transverse = horizontal
What is a scissor bite?
One or more buccal segment teeth occlude entirely buccal to the lower arch teeth
When undertaking an orthodontic assessment what does the Frankfort Mandibular Planes Angle help us to assess?
The vertical dimensions
Why are study models gnatho statically trimmed?
To observe the occlusion without the aid of an articulator
What is the importance of lip competence?
- lower lip acts as a retainer - maintaining position of upper incisors and minimising the overjet
- creates an anterior oral seal during swallowing
- minimises mouth breathing
What is dento alveolar compensation?
When teeth compensate for the skeletal pattern discrepancy to aim for class I incisor relationship
What are examples of dento alveolar compensation?
- class II - retroclined upper incisors, proclined lower incisors
- class III - proclined upper incisors, retroclined lower incisors
What is the difference between competent and incompetent lips?
Competent = when lips are at rest they come together easily and form an oral seal
Incompetent = when lips are at rest they do not meet
What is a model called when it has had teeth moved in it and placed on with wax?
Keeping set up
