Long-term skeletal and soft-tissue responses after advancement genioplasty.
BACKGROUND
The objectives of this cephalometric study were to assess the skeletal stability of advancement genioplasty 3 years after surgery and to evaluate the predictability of soft-tissue changes.


METHODS
The subjects comprised 21 consecutive patients who had no additional orthognathic surgical procedures. Lateral cephalograms were taken at 5 times: immediately preoperative, immediately postoperative, 6 months postoperative, and 1 and 3 years postoperative.


RESULTS
Mean surgical advancement at pogonion was 8.4 mm. Three years after surgery, mean relapse at pogonion was 8% of the surgical advancement. Part of this change was most likely due to bone remodeling. No patient demonstrated a clinically significant postoperative change at pogonion. The soft tissue of the chin was found to follow bony movement in a ratio of 0.9:1. Great individual variability was observed. The mentolabial fold depth increased as a result of the treatment. Effects of advancement genioplasty on the lips were small.


CONCLUSIONS
A prediction ratio based on long-term skeletal changes is likely to generate an estimate that is more appropriate to present to the patient.
Shaughnessy
Stefan
S
Public orthodontic practice, Hokksund, Norway.
Mobarak
Karim A
KA
Høgevold
Hans Erik
HE
Espeland
Lisen
L
D000328:Adult; D001860:Bone Plates; D016025:Bone Transplantation; D001864:Bone Wires; D002508:Cephalometry; D002680:Chin / Q000033:anatomy & histology / Q000601:surgery*; D005260:Female; D006801:Humans; D019248:Jaw Fixation Techniques / Q000295:instrumentation; D008046:Lip / Q000033:anatomy & histology; D008297:Male; D019186:Mandibular Advancement / Q000379:methods*; D011379:Prognosis; D012008:Recurrence; D018709:Statistics, Nonparametric; D016896:Treatment Outcome