CLINICAL MEDICINE

Detailed explanation-1: -State the vertical angulation used for the mandibular topographic occlusal projection:-55; centered over chin. State the vertical angulation used for the mandibular cross-sectional occlusal projection: +90; centered 1 inch below chin.

Detailed explanation-2: -It is important to have a minimum of 1 cm of film/phosphor plate anterior to the mandibular central incisors. The central ray (PID) is aimed with a vertical angle of-55 to-60 degrees, a horizontal angle of 0 degrees and centered on the chin.

Detailed explanation-3: -The mandibular occlusal projection is taken when images of the floor of the mouth [sialoliths], mandibular tori, position of supernumary, roots or impacted teeth, fractures, foreign body, are required to be viewed.

Detailed explanation-4: -What position is the patients head when taking a mandibular cross-sectional occlusal radiograph? Patient reclined in chair with head tipped back.