Abstract
 Evaluation of rotational and vertical dimensional changes of face and jaws following the use of “Fa II “functional device
in CL II female patients
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 Dr. Hosseinzadeh-Nik T.,1 Dr. Salem-Milani A.,2 Dr. Habibi M.,3 Dr. Kharazi-Fard MJ.4
 1Associate Professor, Orthodontics Department, Faculty of Dentistry. Dental Research Center Tehran
 University / Medical Sciences, Tehran, Iran.2Dentist, Private Practice, Tehran, Iran. 3Orthodontist, Private Practice, Tehran, Iran. 4Biostatistics Consultant, Dental Research Center, Tehran University / Medical Sciences, Tehran, Iran.
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 Abstract
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 Background & Aim: The functional appliances can influence dentofacial growth of anterior-posterior posture of jaws. However, there would be some changes on other dimensions of face in pre-adolescent age group patients. The aim of this study was to demonstrate the influence of Fa II appliance on vertical and rotational growth of jaws in adolescent female cases.
 Materials & Methods: This clinical trial investigation was conducted with nineteen female CL II div.l participants who underwent functional therapy with Fa II appliance for 12-18 months. Lateral cephalograms were taken before and after treatment in order to compare them with untreated control subjects as well as the template group. Student t-test was used for statistical data analysis.
 Results: The analysis of data showed that vertical dimensions were increased specially in lower part of the face (P<0.01). No rotational changes occurred on the upper and lower jaws (mandible P=0.86 and maxilla P=0.58). Direct relationship was observed between increasing vertical dimension on the posterior part of the face and forward rotation of mandible (P=0.004) and dentoalveolar drift of mandible with backward rotation (P=0.034).
 Conclusion: Based on the results of this clinical trial,the Fa II functional appliance can increase the vertical dimension of face (posterior-anterior) and help with rotation of both jaws in positive directions which is preferable therapy for normal and short CL II cases.
 Key words: Skeletal CL II- functional appliance- Rotation.
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 Corresponding Author: Dr. Habibi M., Orthodontist, Private Practice, Tehran, Iran.
 e.mail: maryamhabyby@yahoo.com
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