orthodontic diagnosis Flashcards
if a patient has epilepsy, delay orthodontic tx until what?
the epilepsy is well controlled
what must you know before deciding wether a patient is suitable for orthodontic appliances?
- medical history
- dental history
- social history(habits, enthusiasm)
- EO
- skeletal pattern
what different planes is the skeletal pattern measured in?
1) anteroposteriorly
2) vertically
3) transversely
what is the lower facial height?
the distance from the eyebrow to the base of the nose should equal the distance from the base of the nose to the lowermost point on the chin
what does FMPA stand for?
frankfort madibular planes angle
an occlusal plane asymetry is easier to see if what?
the patient bites onto a tongue spatula
the tongue is used to what?
achieve an anterior seal when swallowing
what should be checked on intra oral examination before ortho treatment?
- OHI
- chart all the teeth
- palpate for canines
- previous trauma
- tooth tissue loss
- teeth of poor prognosis( restored, caries)
- any dental anomalies
what should be checked on the labial segment?
- overjet
- overbite
- anterior cross bites
- centrelines
what should be checked on the buccal segments?
- general alignement and presence of crowding/spacing
- any rotated teeth or displacement from the line of arch
what is class 1 incisor relationship?
where the lower incisor edges occlude with or lie below the cingulum plateau of the upper incisor
class 2 incisor relationship is divided into what?
2 subdivisions
what is class 2 incisor relationship divison 1?
upper incisors proclined. increased overjet
what is class 2 incisor relationship division 2?
upper incisors retroclined
what is class 3 incisor relationship?
the lower incisor edges lie anterior to the cingulum plateau
