Perception of changes in soft-tissue profile after Herbst appliance treatment of Class II Division 1 malocclusion
Am J Orthod Dentofacial Orthop 2017;151:559-64
In this study, we sought to assess the perception of changes in soft-tissue profile after Herbst appliance treatment by comparing facial profile silhouettes before treatment, immediately after treatment, and 2 years after treatment, as examined by orthodontists, general dentists, and laypersons. Methods: The sample comprised 21 patients (mean age, 9.5 6 0.5 years), who were treated with the Herbst appliance for a mean period of 12 (61.1) months. Three lateral cephalograms were obtained at different times: baseline, immediately after removal of the Herbst appliance, and 2 years after removal of the appliance. The 63 resulting profile silhouettes were evaluated by 120 examiners divided into 3 groups: orthodontists, general dentists, and laypersons. The examiners were instructed to choose their preferred profile and note how much change they perceived across profiles using a visual analog scale. Results: All groups of examiners preferred the posttreatment pro- files. However, on quantitative assessment, the magnitudes of changes in the profile were found to be variable and rather small, with laypersons quantifying the greatest magnitude of change. Conclusions: Early Herbst appliance treatment produced positive changes in the facial profile that were visually appreciable both immediately after removal of the appliance and 2 years after treatment.