This study was done to evaluate the effect of the skeletal factors of craniofacial structures in the patients complaining lip protrusion. For the study, comparative evaluation was performed between the group of lip protrusion consisted of 60 and the n...
This study was done to evaluate the effect of the skeletal factors of craniofacial structures in the patients complaining lip protrusion. For the study, comparative evaluation was performed between the group of lip protrusion consisted of 60 and the normal group consisted of 99 adult mate and female. The normal group was selected under the criteria of no skeletal discrepancy in craniofacial area, balanced facial esthetics and no history of orthodontic treatment.
The results were as follows in the lip protrusion group:
1. The antero-posterior relationship of the mandible to the cranium was more retrognathic than the normal group (p<0.05).
2. The vertical relationship of the maxilla and mandible to the cranium was more divergent than the normal group (p<0.05).
3. The degree of protrusion of upper lip-alveola area was increased than the normal group (p<0.05).
4. The basal relationship between maxilla and mandible was showed Class Ⅱ tendency than the normal group (p<0.05).
5. The gonial an91e was greater than the normal group (p<0.05).
6. There were no significant difference in the cranial base flexure between the lip protrusion group and the normal comparative group.