Abstract
Objectives:
This study aimed to determine the factors influencing the lower lip profile
during Class III lower total arch distalization camouflage treatment.
Methods:
The cohort included 45 patients diagnosed with skeletal class III
malocclusion. These patients underwent camouflage orthodontic treatment with
lower arch total distalization. Lateral cephalograms were taken at the
pretreatment and posttreatment stages. Cephalometric measurements were
analyzed to unravel the influencing factors of the lower lip profile. This
study defined new variables, i.e., CK and CKA, for detailed
soft tissue analysis.
Results:
Novel soft tissue measurements presented in this study showed statistically
significant changes after treatment. The CK angle and L1 to A Pog, L1 to NB,
and IMPA were statistically correlated. Simple regression analysis was
performed between variables. The formula was ΔCKA = 0.79(Δ L1
to NB) -1.6, and multiple regression resulted in ΔCKA = 0.5(Δ
L1 to NB) – 0.42 (‘LL to Eline’, before treatment).
Conclusion:
The present study provided evidence that the lower lip evaluations, including
the novel CKA and CKHA, were significantly related to the mandibular incisor
position during total distalization of the mandibular dentition. The results
demonstrated that clinically significant lip retraction could be obtained.
Therefore, non-extraction with distalization must be suggested as the first
treatment option in mild skeletal class III malocclusion patients.
Publisher
Bentham Science Publishers Ltd.