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 Standard intraoral film positioning and viewing (nondigital films will have the embossed “dot” coming out towards you).

 Decide if the image is maxillary or mandibular.Maxillary: is there a white line formed by the dorsal plate of the alveolar process of the maxilla (see Figure 3.30)? (Remember, typically the only three rooted teeth are in the maxilla.)Mandibular: is the mandibular canal seen?

 Position the image with the crowns “in the mouth” like a Cheshire cat grin (mandibular roots pointing down, maxillary roots pointing up) (Figure 3.29).

 Identify side:For canines and incisors: “shake hands” – image’s right is on your left and image’s left is on your right (see Figure 3.28).For premolars: determine “which way is the nose”; is the rostral aspect of the image toward your right or toward your left (Figure 3.30)?Exception: for any extraoral film, right and left will be opposite as compared to an intraoral film (Figure 3.31).