When using a size 2 receptor for anterior placements with the bisecting technique, which radiograph would be exposed first?

When using a size 2 receptor for anterior placements with the bisecting technique, which radiograph would be exposed first?

• A. Canine (tooth #6)
• B. Central incisor
• C. Lateral incisor
• D. First premolar

Answer: (A)

In the bisecting-angle technique, you position the receptor against the palate and angle the x-ray beam to bisect the angle between the tooth’s long axis and the receptor. The canine is the easiest starting point for this setup in the anterior region because its palatal surface sits relatively flat and it provides a stable anchor for establishing the correct angulation. Once the canine image is captured, you can use that established reference to image the central incisor and lateral incisor with consistent, reduced distortion. The central and lateral incisors require more precise vertical angulation and are more prone to overlapping or distortion if you start with them. The first premolar is not an anterior tooth, so it wouldn’t be selected in this anterior series.

In the bisecting-angle technique, you position the receptor against the palate and angle the x-ray beam to bisect the angle between the tooth’s long axis and the receptor. The canine is the easiest starting point for this setup in the anterior region because its palatal surface sits relatively flat and it provides a stable anchor for establishing the correct angulation. Once the canine image is captured, you can use that established reference to image the central incisor and lateral incisor with consistent, reduced distortion. The central and lateral incisors require more precise vertical angulation and are more prone to overlapping or distortion if you start with them. The first premolar is not an anterior tooth, so it wouldn’t be selected in this anterior series.