AUTHOR(S): Sally T Al-Ahmed, Hassan Farah and Mohamad Ziad Sultan

ABSTRACT:Patients' acceptance of an orthodontic appliance may influence compliance and thus contribute to a successful outcome of treatment. The aim of this study was to compare between Herbst and Korn MA fixed functional appliances on their acceptance by patients. 30 patients with skeletal class II malocclusion were dividided into two groups. For each 15 patients (Female and male). Questionnaire was based on four-point scale (1,2,3,4) for seven questions regarding pain, discomfort and effect on oral functions. The results of this study indicated oral soft tissue tension, pain and discomfort occurred when applying fixed functional appliances (Herbst and Korn MA) only during the first two weeks, then gradually decreased within three months until they finally faded in the remainder of the treatment.There was a restriction in the mandibular movements during the first two weeks only.There was no effect of the fixed functional appliances used on the patient’s confidence and feelings of shame in front of others. We recommend the use of Korn MA appliance as one of the alternatives of the fixed functional appliances used to correct skeletal class II malocclusion associated with mandibular retrognathia in cases that need dental movements by using the fixed orthodontic appliance in conjunction with the stage of correcting the skeletal discrepancy.

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