What is the ideal design of a paralleling image receptor holder?
a. A short bite block and an L-shaped backing
b. A long bite block and an L-shaped backing
c. A short bite block and a 105-degree backing
d. A long bite block and a 105-degree backing
b. Image receptor holders designed for use with the paralleling technique usually have a long bite block area for the purpose of achieving a parallel relationship between the recording plane of the image receptor and the long axes of the teeth and an L-shaped backing to help support the image receptor and keep it in position.
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