. Elementary and dental radiography / by Howard Riley Raper . if the film can be placed down far enough. an insufficient length of time to give them a fair trial. It may, neverthe-less, be stated that the Leach film holders will be found very useful,especially to the beginner. Dr. Tousey, of New York City, and Dr. Ketcham, of Denver, havealso designed special dental film holders. I am not inclined to consider the question of the operator or assistantholding the film, further than to warn you against the practice. (See MAKING DliNTAL RADIOGRAPHS in chapter VIII.) Do not do it; the repeated expo
. Elementary and dental radiography / by Howard Riley Raper . if the film can be placed down far enough. an insufficient length of time to give them a fair trial. It may, neverthe-less, be stated that the Leach film holders will be found very useful,especially to the beginner. Dr. Tousey, of New York City, and Dr. Ketcham, of Denver, havealso designed special dental film holders. I am not inclined to consider the question of the operator or assistantholding the film, further than to warn you against the practice. (See MAKING DliNTAL RADIOGRAPHS in chapter VIII.) Do not do it; the repeated exposure is dangerous. Havethe patient hold the film. Some difficulty due to gagging is sometimes experienced when thefilm is held in position for upper second and third molars. To patientswho will not tolerate the film in this location, I sometimes say this: Iknow you cannot keep from gagging when something tickles your , did you know this? you can keep from gagging as long as you canhold your breath. Unless the X-ray machine used is a small one the. Fig. 101. Position of film for radiographing lower anterior teeth. See pose Fig. 102. Theprinciple, here illustrated, of deliberately bending a part of the film in order to avoid bend-ing all of it, is, perhaps, the most important and fundamental single thing to be learnedabout the application of films to the mouth. This principle is applicable not only to thelower anterior region, but to other parts of the mouth as well, particularly the upper ante-rior part. To make the radiograph illustrated in Fi«*. 102 the film was bent abruptly back-ward a little on both sides instead of on one side only as illustrated here. exposure can be made while the patient holds the breath. (Thepsycho-therapist may analyze this treatment for gagging to his heartscontent.) Plates are usually used in preference to films forextra-oral radiographs because they are easier tohandle and cheaper. If the negative is to be sentthrough the mail it is best
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