LAUSR

&NA; The purpose of this study was to illustrate the effects of growth hormone (GH) therapy and fixed functional appliance treatment in a 13‐year‐old Class II malocclusion patient without GH deficiency. GH has been shown to effectively increase endochondral growth and induce a more prognathic skeletal pattern. Although a major concern in Class II retrognathic patients is chin deficiency, long‐term studies have shown that the mandibular growth enhancement effects of functional appliances are clinically insignificant. This case report demonstrates that the mandible grew significantly during fixed functional appliance treatment combined with GH therapy, with stable results during 2 years 11 months of retention. More studies are needed to evaluate GH therapy as a supplement in Class II treatment. HighlightsGrowth hormone therapy affects the growth of the mandibular condyle and the ramus.The Forsus appliance can produce fast overjet correction without patient cooperation.Growth hormone therapy can be helpful in the treatment of Class II retrognathic patients.