Dentofacial Deformities Flashcards
in what direction does normal facial growth occur?
downward and forward, with lateral expansion
When malocclusion involves skeletal discrepancy, treating with ortho alone may result in adequate occlusion, but poor what?
poor facial or dental esthetics and may not be a long term solution.
in px with excessive growth, like mandibular prognathism, when should you do surgery?
delay until growth is complete
what presurgical even aligns the teeth to the arches, but also magnifies the appearance of defects?
Decompensation
elongation of the face, narrow nose, excessive incisal and gingival exposure, and lip incompetence is common if a patient has what?
vertical maxillary excess
what three things are a factors of an anterior open bite?
1-results from excess downward growth of mx
2-causes downward rotation of mandible
3-results of premature contact of posterior teeth
what is the occurrence of cleft lip/palate in the US?
1 in 700 births
- boys 3:2
- asians more than blacks
During what weeks do clefts occur?
5th-10th week in utero
If a parent has a cleft, what is the likelihood a kid will?
2-5%
if more than one person in immediate family has a cleft, the risk rises to what?
10-12%
What is the timing for surgical repair for a cleft lip?
Rule of 10: 10 lb, 10 weeks, 10 g/dL hemoglobin
What is the timing for surgical repair for a cleft palate?
8-18 months, sometimes 4-5 yrs
what are the 6 benefits for early cleft surgery?
1-better palatal and pharyngeal muscle development 2-ease of feeding 3-development of phonation skills 4- better auditory function 5-better hygiene 6- psychologic
*scars or mx growth restriction possible
When preforming a palatorrhaphy what are you closing?
Close soft tissues of the palate only
*nasal mucosa, muscle, and oral mucosa
