Abstract :
Objective- Background: To evaluate the effects of Rapid Maxillary Expander(RME) with posterior bite blockson pharyngeal airway dimensions, related soft tissues and Hyoid bone in patients with adenoid hypertrophy and to compare these changes with Control Group.
MATERIAL AND METHODS: 32 subjects with adenoid hypertrophy ( mean age 11.6 yrs) with a transverse discrepancy were selected for the study. The patients were randomly divided in two groups- Group A: (n=16) RME with posterior bite block group, Group B : ( n=16) Control group. In Group A Lateral cephalograms were recorded before start of treatment(T0), Immediate after expansion (T1), and after 9 months of retention (T2). In Group B Lateral cephalograms were recorded at the beginning (T0), and after 9 months(T2). Cephalometric measurements in the sagittal dimensions of the pharyngeal airway (Nasopharynx, Oropharynx and Hypopharynx), tongue posture and hyoid bone position were measured and compared using Paired and Unpaired t-test with p
RESULTS: In Group A, Nasopharyngeal airways (Depth of Nasopharynx and Height of Nasopharynx), Soft palate thickness (SPT),Tongue height(TGH) was increased significantly and Soft palate length(SPL), Soft palate inclination(SPI) and Tongue Length(TGL) was decreased which was statistically significant, when compared to Group B.
CONCLUSION: Significant increase in the dimensions of the nasopharyngeal airways, upward posture of tongue and upward and forward movement of the hyoid bone was seenin treatment group when compared to control group.
Keyword :
Adenoid hypertrophy,Rapid maxillary expander,Posterior bite blocks,Pharyngeal airway dimension.