Intro To Ortho Flashcards
How are the relationship of teeth determined
Underlying jaws, skeletal relationship
What do the maxilla and mandible attach to
Anterior and posterior cranial base (respectively)
What are the two landmark points in identifying skeletal relationships
Innermost curvature of upper lip (basal bone)
Innermost curvature of lower lip
2-3mm normal
Frankfurt plane
Top of ear hole to orbit
Class 1
Mandible 2-3mm behind maxilla
Class II
Mandible > 3mm behind maxilla
Class III
Mandible< 3mm behind maxilla
Mandibular/maxillary hypoplasia
Small mandible/maxilla
Mandibular/maxillary prognathism
Large mandible/maxilla
Hemmimandbular hypertrophy
Facial asymmetry
Condylar cartilage and ramus still growing
Most common group for hemmimandibular hypertrophy
Mainly in females late teens early twenties
Slow gradual process
Why to take lateral cephalogram
If you think there is a skeletal misrelation
Treatment for skeletal discrepancies in
- Growing pts
- Adults who have completed growth
- Functional appliances, headgear, reverse head pull face mask and RME
- Orthognathic surgery or single jaw or bimaxillary procedures
Most common mandibular orthognathic surgery
Bilateral sagittal split osteotomy (BSSO)
