ORIGINAL ARTICLE
Year : 2020  |  Volume : 12  |  Issue : 2  |  Page : 131-138

Assessment of Airway Dimensions and Hyoid Bone Position in Class II Patients Treated with Fixed Twin Block and Forsus Fatigue Resistant Device − A Retrospective Cephalometric Study


1 Private Practioner at The Dentist, Mumbai, Maharashtra, India
2 Department of Orthodontics, KLE VKIDS, KAHER, Belagavi, Karnataka, India

Correspondence Address:
Dr. Tejashri Pradhan
Professor and Head, Department of orthodontics, KLE VKIDS, KAHER, Belagavi 590010, Karnataka
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jofs.jofs_36_20

Rights and Permissions

Introduction: Obstructive Sleep Apnea Syndrome (OSAS) regulate pharyngeal airway volume. Forward displacement of mandibular repositioning appliances has advantage over an improvement of pharyngeal airway space and a change in the hyoid bone position. This study aims to assess the changes in the pharyngeal airway dimensions and hyoid bone position in growing individuals with retrognathic mandible treated with Fixed Twin Block (FTB) and Forsus Fatigue Resistant Device (FRD) to correct the skeletal Class II pattern. Materials and Methods: 40 skeletal Class II pattern patients were included in the study, to assess the pharyngeal airway space at three levels, upper pharyngeal width (UPW), middle pharyngeal width (MPW), and lower pharyngeal width (LPW). Hyoid bone measurements were Vertical dimension H-HOR and Horizontal dimension was H- VER. The study patients were divided into three groups and in each group 20 patients. Group-A treated with FTB appliance and Group-B treated with Forsus FRD appliance and Group C served as control group. At pre and post functional treatment condition, lateral cephalograms were evaluated. Results: Cephalometric analysis revealed a significant increase in the mean change of MPW (P = 0.005) between the FTB and the control group. There was significant, mean change seen of pre, post UPW, mean change of MPW over groups (P<0.01). Statistical significant difference was noted in the mean change of mandibular corpus length over groups and also when compared with FTB-Control (P<0.01). A significant difference in the mean change of the mandibular unit length, premandibular corpus length over the groups was noted. Conclusion: The FTB appliance was more effective in correcting the skeletal class II malocclusion as compared to the Forsus FRD appliance and therefore, there was marked improvement in the oropharyngeal airway dimensions (UPW, MPW) and hyoid bone displacement (anterior and superior).


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed92    
    Printed0    
    Emailed0    
    PDF Downloaded19    
    Comments [Add]    

Recommend this journal