A bifurcated graft is ________________

Idiopathic leukoplakia:

a. May recur after excision b. Is caused by papillomavirus c. Is clinically diagnostic and therefore re-quires no biopsy d. Is most commonly seen in children and young adults e. None of the above

Each of the following statements regarding orientation of the occlusal radiographic image receptor is correct except one. Which one is the exception?

A) If using film, the white side must face the arch of interest. B) The image receptor must be placed in the mouth with the long dimension horizontal. C) The image receptor should protrude from the mouth about 0.25 inch. D) If using film, the embossed dot should be positioned toward the anterior.