Maxillary Sinus Area in both Gender and its Relation to Skeletal Class III Malocclusion
The maxillary sinus is the largest of the four paranasl sinus ,among the paranasal sinus. Its plays an important role in the formation of facial contours. Therefore, knowledge of the development and size of the maxillary sinus may be crucial for diagnosing and treating various cases of malocclusion . The purpose of this study is to evaluate the effect of malocclusion in skeletal class III on maxillary sinus dimensions ,80 Iraqi subjects have been chosen, lateral cephalometric radiograph had been taken for each examined subject, then samples has been divided into two groups according to SNA and ANB angle .the first group included 40 subjects who were class I skeletal malocclusion which composed of 20 males and 20 females ,the second group included 40 subjects who were class III skeletal malocclusion which composed of 20 males and 20 females. Then the radiograph were analyzed to determine the measurements of maxillary sinus area. The procedure was accomplished by mean of computer and Auto Cad program version 2008,it had been found that maxillary sinus area were Larger in male than females in both skeletal classes. There is significant difference between SNA angle and CL.III .