Abstract
Objective
To analyze and display facial movement data from noncleft subjects and from patients with cleft lip and palate by using a new dynamic approach. The hypothesis was that there are differences in facial movement between the patients with cleft lip and palate and the noncleft subjects.
Setting
Subjects were recruited from the University of North Carolina School of Dentistry Orthodontic and Craniofacial Clinics.
Patients, Participants
Sixteen patients with cleft lip and palate and eight noncleft “control” subjects.
Interventions
Video recordings and measurements in three dimensions of facial movement.
Main Outcome Measures
Principal component (PC) scores for each of six animations or movements and dynamic modeling of mean animations.
Statistics
Multivariate statistics were used to test for significant differences in the PC mean scores between the patient groups and the noncleft groups.
Results
No statistically significant differences were found in PC mean scores between the patient groups and the noncleft groups; however, the variability of the effect of clefting on the soft tissues during animation was noted when the noncleft data were used to establish a “normal” scale of movement. Compensatory movements were seen in some of the patients with cleft lip and palate, and the compensation was not unidirectional.
Conclusion
Measures of mean movement differences as summarized by PC scores between patients with cleft lip and palate and noncleft subjects may be misleading because of extreme variations about the mean in the patient group that may neutralize group differences. It may be more appropriate to compare patients to a noncleft normal scale of movement.
Get full access to this article
View all access options for this article.