Evaluation of Vertical Skeletal Changes in Hyperdivergent Individuals Who Underwent Four Premolar Extraction Treatments

Abstract

Objective The study aimed to assess skeletal changes in the vertical plane in hyperdivergent individuals who underwent fixed orthodontic treatment that included the extraction of four premolars. Materials and Methods The study was carried out on the cephalometric radiographs of 52 individuals. The patients were classified into Group A, who underwent fixed orthodontic therapy without extraction, and Group B, who underwent fixed orthodontic extraction. Patients characterized by the following were included: skeletal class I, hyperdivergent individuals, ≤ 6 mm crowding for Group A, 6 mm for Group B individuals with crowding > 6 mm, and individuals in whom tooth extraction space is closed with a moderate or minimum anchorage. The FMA, Post. SUM, Sn/GoGn angles, and N–Me distance in radiographs were evaluated at the beginning (T1) and end of treatment (T2). Results The SN/GoGn, Post. SUM, and N-Me values were higher during T2 than during T1 in both groups (p = 0.05; p < 0.01). A comparison of the T2–T1 difference according to the groups and the measurement values, whereas no statistically significant difference was observed in the Sn/GoGn, FMA, or N–Me changes. The 0.430 increase in the Post. SUM value showed a statistically significant difference. Conclusion In hyperdivergent patients receiving orthodontic treatment involving the extraction of four premolars, minimum- and moderate-anchorage alternatives have no influence on the vertical direction. Clinical Relevance: The impacts of various anchoring techniques on individuals vertical characteristics should be considered when planning a fixed orthodontic treatment.