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Since 2003 the radiologist assistant (RA) was introduced in response to the severe shortage of radiologists and the increased demand for medical imaging services. Other non-physician clinicians, such as PAs, currently play an important role in the medical imaging environment. The article discusses the reasons physician assistants have found favor with… (More)
An analysis has been made of the mechanics of the Thompson dowel retainer. The analysis locates the center of rotation during function and identifies the factors that affect its position. The degree to which the dowel should be relieved to permit unrestricted rotation has been established. The rationale of an occlusal bevel and the limits of its positioning… (More)