TOPIC: BISECTING LINE ANGLE TECHNIQUE
π IMPORTANT POINTS TO REMEMBER
πΉBisecting line angle technique is also called short cone technique.
πΉCieszynski rule: This rule states that two triangles are equal when they share one common side and have two equal angles. The central ray of the X-ray beam and the imaginary bisector result in formation of two congruent right-angled triangles.
πΉMaxillary radiograph: While taking a maxillary radiograph, the head should be positioned downward so that the line drawn from ala of the nose to tragus of the ear (alaβtragus line) is parallel to the floor. This is also called an upper horizontal baseline.
πΉMandibular radiograph: While taking the mandibular radiograph, the chin should be moved upwards so that the line drawn from the corner of the mouth to the tragus of the ear should be parallel to the floor. This is also called a lower horizontal baseline.
πΉIncisor and canine: The long axis of the film should be placed vertically.
πΉPremolar and molars: The long axis of the film should be placed horizontally.
