Cephalometric evaluation of skeletal alterations induced by Herbst appliance during mixed dentition

Luana Paz SAMPAIO, Dirceu Barnabé RAVELI, Ary dos SANTOS-PINTO, Denise Rocha Goes LANDÁZURI, Taísa Boamorte RAVELI

Objective: The present prospective clinical study was designed in order to evaluate horizontal and vertical skeletal alterations induced by the use of Herbst appliance in individuals with Class II, division 1 malocclusion during mixed dentition stage. Methods: The sampling consisted of 15 pre-pubertal individuals (12 boys and 3 girls; initial age 9 years and 6 months), who were treated with Herbst appliance for a period of 7 months. The efects of the treatment were compared to a group of 15 individuals with Class II, division 1 malocclusion (8 boys and 7 girls, initial age averaged 9 years and 1 month), orthodontically untreated, who were followed up for a period of 12 months. Statistical analysis was performed with Student’s t-test with signiicance level at 5%. Results: It was showed that the treatment with Herbst appliance in mixed dentition stage has restricted maxilla growth. Mandibular and palatal planes have not undergone signiicant alteration; however, anterior and posterior facial heights have increased signiicantly. Facial convexity and maxillomandibular relationship were altered positively. Mandible has positioned signiicantly forward and its efective length increased 2.5 times more than the increase observed in control group. Conclusion: It was possible to conclude that Herbst appliance was able to provide satisfactory results in individuals during mixed dentition stage.

Keywords: Herbst appliance. Class II malocclusion. Early treatment.

How to cite: Sampaio LP, Raveli DB, Santos-Pinto A, Landázuri DRG, Raveli TB. Cephalometric evaluation of skeletal alterations induced by Herbst appliance during mixed dentition. Dental Press J Orthod. 2012 Mar-Apr;17(2):140-50.

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