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Optical fibers work because of

Reverberation time of a room can be increased by covering the walls with better reflectors of sound.

What instrument is designed with the face set at 70° to the terminal shank and one cutting edge on each working end?

Case #2 – Your patient is a 21-year-old male presenting for an appointment 16 months after his last appointment. He has no significant findings on his health history. He has sealants on all of his first molars and a veneer on tooth #9. There is a grayish ‘shadow’ to the occlusal surface of #31 and obvious cavitation to the occlusal of #18. You note generalized heavy biofilm deposits, especially at the cervical margin of the maxillary anterior teeth.Question: The marginal gingiva is bright red and the interdental papillae are puffy and rounded. The probe depths are from 2-4 mm and bleed easily. What is your finding?

When is the best time to present oral hygiene education to your patient?

The ultrasonic scaler converts electrical energy into high frequency (“ultrasonic”) sound waves.  The sounds waves then:

Which of the following would be suitable for this patient with these open class 1 cervical embrasures? ex 2 cl 1 emb.jpg

Which of the following would be LEAST helpful to the patient in cleaning the area with this fixed retainer device?  ex 2 retainer.jpg

What gingival condition is depicted here? ex 2 pd1.PNG

Of the following choices, what insert and power setting would be best to remove this type of heavy calculus? supra.jpg