Change of lip-line cant after 1-jaw orthognathic surgery in patients with mandibular asymmetry

Hwang, Hyeon-Shik; Min, Yu-Sun; Lee, Suk-Cheol; Sun, Min-Kyu; Lim, Hee-Chang

doi:10.1016/j.ajodo.2007.10.060

Cited by 35 publications

(39 citation statements)

References 8 publications

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“…We therefore decided to use only pretreatment and posttreatment data in the study. The longer span between pretreatment and posttreatment than has been used in some other studies [4][5][6]14 meant that the current study could reflect latent relapses after orthognathic surgery and muscular adaptation.…”

Section: Discussionmentioning

confidence: 95%

“…In a previous study of one-jaw surgery patients, 4 correction of LLC was positively correlated with pretreatment LLC (coefficient of 0.663) and with change in gonion line cant (coefficient of 0.448). Studies of two-jaw surgery patients have shown that correcting the LLC was positively correlated with correcting the maxillary canine line cant 5 and maxillary first molar line cant.…”

Section: Discussionmentioning

confidence: 99%

“…To improve the accuracy of placing landmarks, recent researchers have adopted methods that use combinations of 3-D facial scan images, 5,12,13 3-D CBCT images, 4,6,10,12,14,15 and conventional 2-D diagnostic tools such as facial photograms or anteroposterior cephalograms. [7][8][9]16,17 Those methods could be acceptable because their primary concern was the changes in measurements between pretreatment and posttreatment within a single group.…”

Section: Discussionmentioning

confidence: 99%

“…Few studies have been conducted on LLC correction in one-jaw surgery patients. Hwang et al 4 reported that LLC was corrected by 1.98 on average in facial asymmetry patients who underwent one-jaw surgery.…”

Section: Introductionmentioning

confidence: 99%

“…Many quantitative studies have reported that lip line cant (LLC) can be corrected via both one-jaw and two-jaw surgery, as can craniofacial skeleton and dentition. [4][5][6][7][8][9] Kim et al 9 investigated the vertical asymmetry of LLC change in Class III asymmetry patients who underwent two-jaw surgery, using facial photograms and anteroposterior cephalograms. They reported that the mean LLC correction was 1.56 mm (1.188), which is approximately 50% of the change in occlusal plane cant after surgery.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Lip line changes in Class III facial asymmetry patients after orthodontic camouflage treatment, one-jaw surgery, and two-jaw surgery: A preliminary study

Lee

Yoo

Kim

et al. 2016

The Angle Orthodontist

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Objective: To evaluate the effects of orthodontic camouflage treatment (OCT), one-jaw surgery, and two-jaw surgery on the correction of lip line cant (LLC) and to examine factors affecting the correction of LLC in Class III craniofacial asymmetry patients. Materials and Methods: A sample of 30 Class III craniofacial asymmetry patients was divided into OCT (n ¼ 10), one-jaw surgery (n ¼ 10), and two-jaw surgery (n ¼ 10) groups such that the pretreatment LLC was similar in each group. Pretreatment and posttreatment cone-beam computed tomography scans were used to measure dental and skeletal parameters and LLC. Pretreatment and posttreatment measurements were compared within groups and between groups. Pearson's correlation tests and multiple regression analyses were performed to investigate factors affecting the amount and rate of LLC correction. Results: The average LLC correction was 1.008 in the one-jaw surgery group, and in the two-jaw surgery group, it was 1.718. In the OCT group it was À0.048, which differed statistically significantly from the LLC correction in the other two groups. The amount and rate of LLC correction could be explained by settling of skeletal discrepancies or LLC at pretreatment with goodness of fit percentages of approximately 82% and 41%, respectively. Conclusions: Orthognathic surgery resulted in significant correction of LLC in Class III craniofacial asymmetry patients, while OCT did not. (Angle Orthod. 2017;87:239-245)

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%