A Cephalometric Analysis for Evaluation of Changes in Soft Tissues in the Regions of the Upper and Lower Lips and Chin due to Orthognathic Maxillary Advancement Surgery
Int. arch. otorhinolaryngol. (Impr.)
;
18(1): 57-62, 01/2014.
Article
in English
| LILACS
| ID: lil-709744
ABSTRACT
Introduction:
There is currently no consensus regarding the best method for predicting the changes in soft tissues due to the modification of hard tissues in orthognathic surgery.Objective:
To measure the changes in soft tissues of the upper lip, lower lip, and chin regions due to the modifications of hard tissues caused by orthognathic maxillary advancement surgery using a cephalometric methodology.Methods:
The study was conducted on 35 patients with dentoskeletal and facial deformities submitted to orthognathic maxillary advancement surgery. Two teleradiographs were taken one during the preoperative period and the other 1 year after the surgery, on which the cephalometric tracing was drawn.Results:
A strong correlation (r = 0.747) was demonstrated in the horizontal analysis between the hard A (Ah) point (located in the deepest point of the anterior curvature of the maxilla) and the soft A (As) point in the advancement of the maxilla, with a mean variation of 0.859% occurring in As with each 1% variation of the Ah point. A mean variation of 0.698% occurred in the superior soft prostion point (prolongation of the superior hard prostion point to its corresponding point on soft tissue) for each 1% variation in the superior hard prostion point (bone point located at the junction of the alveolar process with the crown of the upper incisors).Conclusion:
The cephalometric methodology applied here revealed that the soft tissues of the upper lip accompanied 70 to 80% of the movement of hard tissues in maxillary advancement and that the soft tissues of the lower lip did not change or showed no significant changes...
Full text:
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Index:
LILACS (Americas)
Main subject:
Cephalometry
/
Orthognathic Surgery
/
Maxilla
Limits:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Language:
English
Journal:
Int. arch. otorhinolaryngol. (Impr.)
Journal subject:
Otolaryngology
Year:
2014
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade de São Paulo/BR
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