TOPIC: BISECTING LINE ANGLE TECHNIQUE

🌟 IMPORTANT POINTS TO REMEMBER

🔹Bisecting line angle technique is also called short cone technique.

🔹Cieszynski 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.

🔹Maxillary 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 (ala–tragus line) is parallel to the floor. This is also called an upper horizontal baseline.

🔹Mandibular 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.

🔹Incisor and canine: The long axis of the film should be placed vertically.

🔹Premolar and molars: The long axis of the film should be placed horizontally.