SİNÜS MAKSİLLARİS'İN İÇİNDE GÖZLENEN YAPILARIN VE SİNÜS MAXİLLARİS'İN FORMUNUN BT İLE DEĞERLENDİRİLMESİ.-THE INVESTIGATION OF THE STRUCTURES INSIDE THE MAXILLARY SINUS AND THE FORM OF THE MAXILLARY SINUS BY COMPUTERIZED TOMOGRAPHY