The frontal soft tissue changes in the lower facial portion after orthodontic treatment combined with anterior segmental osteotomy.
OBJECTIVE
To evaluate changes of the lower facial portion on the frontal view before and after orthodontic treatment combined with anterior segmental osteotomy (ASO) in patients with bimaxillary protrusion.


METHODS
The sample consisted of 16 women in the experimental group who had received ASO and 24 women in the untreated control group. Twelve linear measurements, 5 angular measurements, and the lip perimeter and area were measured and analyzed using unpaired and paired t tests.


RESULTS
The upper lip height and lower lip to chin length were significantly greater after treatment. The upper and lower vermilion heights and all vermilion areas decreased significantly, while lip width did not change. Upper lip height was significantly greater in the posttreatment group than in the control group, but there was no difference in upper and total lip areas.


CONCLUSIONS
Treatment combined with ASO significantly improved the frontal soft tissue proportions. Anticipated frontal soft tissue changes of the lower face should be considered by clinicians for accurate diagnosis and treatment planning.
Department of Orthodontics, Medical School, Catholic University of Korea, Seoul, Korea.
Young Min
YM
Cha
Na Seon
NS
Park
Mohamed
M
Bayome
Seong-Ho
SH
Han
Yoonji
Y
Kim
Yoon-Ah
YA
Kook
D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D002508:Cephalometry; D002680:Chin / Q000033:anatomy & histology; D003131:Combined Modality Therapy; D004955:Esthetics, Dental; D005145:Face / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D007180:Incisor / Q000503:physiopathology*; D008046:Lip / Q000033:anatomy & histology; D009971:Orthodontics, Corrective; D056948:Orthognathic Surgical Procedures; D057887:Overbite / Q000628:therapy*; D016896:Treatment Outcome; D055815:Young Adult