OBJECTIVE: - To compare the upper airway space in obstructive sleep apnea patients before and after the mandibular repositioning using two different techniques METHOD: Group-1Upper and lower primary impressions made, facebow transfer made, centric recordings recorded, maximum protrusion recordings made, 50% protrusion recordings made on George gauze appliance. Articulation done followed by maintenance of 4mm vertical height and appliance was fabricated, finishing and polishing done. Group-2 Upper and lower primary impressions made, facebow record made, bite registration recorded with bite registration wax, articulation done followed by maintenance of 4 mm vertical height and protrusion is done on Hanau articulator by loosening of centric thumb screw, 5mm protrusion done followed by tightening of centric thumb screw and appliance was fabricated, finishing and polishing done. RESULT: The statistical differences between the groups were tested using Statistical analysis was done using paired t- test. The level of significance was set at P < 0.05. Group -1 showed 100% significant changes but for group-2 50% showed significant changes at the level of retropalatal, retroglossal, and epiglottal level at different cross-sectional, mediolateral, and anteroposterior measurements. CONCLUSION: Within the limitation of the study statistical difference was seen between Group-1 mandibular advancement done with George gauze appliance and Group-2 mandibular advancement done with Hanau articulator.
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