 Very carefully, the mucoperichondrial flaps were elevated over this, and it was excised using an osteotome taking care to preserve the 1.5 cm dorsal and caudal strap of the nasal septum and keep it attached to the nasal spine. 
Very carefully , the mucoperichondrial flaps were elevated over this , and it was excised using an osteotome taking care to preserve the 1.5 cm dorsal and caudal strap of the nasal septum and keep it attached to the nasal spine .