Assessment of Changes in Dentoskeletal Parameters Among Class-II Subjects Following Treatment with the Herbst Appliance: A Longitudinal Study

Abstract

Objective: The purpose of this longitudinal study was to investigate dentoskeletal parameter changes in Class II patients after treatment with the Herbst appliance, therefore offering insights into treatment efficacy and results
Material and Methods: A prospective observational design was employed at the Orthodontic Department of Children's Hospital and Institute of Child Health & Avicenna dental College, Lahore in Lahore, Fifty patients who met the inclusion criteria completed pre-treatment assessments, Herbst appliance therapy, and post- treatment evaluations. The data collection includes demographic information, baseline dentoskeletal parameters, and post-treatment measures.
Results: The study included 50 cases, with 34% (n=17) aged 11-12 years and 66% (n=33) aged 13-14 years. Pre-treatment values for SNA were 82.08±0.97, SNB was 75.12±1.32, and IMPA was 95.82±2.32. Post- treatment, SNA decreased to 80.8±1.16, SNB increased to 76.34±1.44, and IMPA rose to 100.62±2.83. Mean differences post-treatment were -1.28±0.61 for SNA, 1.22±0.55 for SNB, and 4.8±1.31 for IMPA, with p- values of 0.07, 0.01, and 0.01 respectively, indicating significant mandibular advancement and lower incisor inclination.
Conclusion: Herbst appliance therapy significantly improved dentoskeletal parameters in skeletal Class II patients, particularly enhancing mandibular position and dental aesthetics. These findings underscore the importance of tailored treatment strategies for optimal orthodontic outcomes.
Keywords: class II malocclusion, dentoskeletal parameters, functional appliance, herbst appliance