In simulated or clinical settings of restricted neck mobility, videolaryngoscopes and fastrach LMA have performed well but neck motion can be occured. Endotracheal intubation will be performed under fluoroscopy. In this study the neck motion angles will be investigated during intubation . The angles will be assessed on fluoroscopy images. A Angle: Angle of the line between occipital protuberance and anterior process of the foramen magnum with the line between central point of spinous process C1 vertebrae and the anterior process of foramen magnum. B Angle: Angle of the line between central point of spinous process of C1 vertebrae and the central point of corpus of C1 with the occipital protuberance and the central point of C1 vertebrae corpus. C Angle: Angle of the line between mandibular mentum and tragus with yhe horizontal line. Angle C also will be assessed with goniometer. The groups will be compared statistically.