OBJECTIVE: To compare the treatment effects and long-term stability of the stepwise Herbst appliance and mandibular sagittal split osteotomy in skeletal Class II adult patients. MATERIALS AND METHODS: Subjects comprised 16 patients in the Herbst group and another 16 patients in the surgery (mandibular sagittal split osteotomy) group. Lateral head films were taken before treatment (T0), after removal of the Herbst appliance/surgery (T1), after the fixed appliance treatment (T2), and 3 years after treatment (T3). All films were analyzed by standard cephalometrics and SO-analysis (analysis of changes in sagittal occlusion). RESULTS: All Herbst and surgery patients were treated successfully to Class I occlusal relationships with normal overjet and overbite. Both groups showed a significant change in mandibular base advancement (SNB, SNPg, Pg/OLp), which resulted in a decrease in the ANB angle, the Wits appraisal, and facial convexity. However, the surgery group showed larger changes in the parameters mentioned above. In terms of long-term stability, both groups achieved stable results, and no significant difference occurred over time. CONCLUSION: Stepwise advancement Herbst appliance therapy can be used to treat borderline skeletal Class II adult patients with long-term stability.
OBJECTIVE: To compare the treatment effects and long-term stability of the stepwise Herbst appliance and mandibular sagittal split osteotomy in skeletal Class II adult patients. MATERIALS AND METHODS: Subjects comprised 16 patients in the Herbst group and another 16 patients in the surgery (mandibular sagittal split osteotomy) group. Lateral head films were taken before treatment (T0), after removal of the Herbst appliance/surgery (T1), after the fixed appliance treatment (T2), and 3 years after treatment (T3). All films were analyzed by standard cephalometrics and SO-analysis (analysis of changes in sagittal occlusion). RESULTS: All Herbst and surgery patients were treated successfully to Class I occlusal relationships with normal overjet and overbite. Both groups showed a significant change in mandibular base advancement (SNB, SNPg, Pg/OLp), which resulted in a decrease in the ANB angle, the Wits appraisal, and facial convexity. However, the surgery group showed larger changes in the parameters mentioned above. In terms of long-term stability, both groups achieved stable results, and no significant difference occurred over time. CONCLUSION: Stepwise advancement Herbst appliance therapy can be used to treat borderline skeletal Class II adult patients with long-term stability.
Authors: Stephan Christian Möhlhenrich; Florian Kötter; Florian Peters; Kristian Kniha; Sachin Chhatwani; Gholamreza Danesh; Frank Hölzle; Ali Modabber Journal: Head Face Med Date: 2021-04-14 Impact factor: 2.151
Authors: Alexandre Moro; Suellen W Borges; Paula Porto Spada; Nathaly D Morais; Gisele Maria Correr; Cauby M Chaves; Lucia H S Cevidanes Journal: Dental Press J Orthod Date: 2018 Mar-Apr