Pengaruh perluasan pneumatisasi sinus sfenoid ke prosesus klinoid anterior terhadap risiko dehiscence dan protrusio arteri karotis interna dan saraf optik berdasarkan tomografi komputer = The influence of extensive pneumatization of sphenoid sinus to the anterior clinoid process against risk of dehiscence and protrusion of internal carotid artery and optic nerve based on computed tomography