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arichman7730 arichman7730
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6 years ago
The invisible aligners provide a method of tooth straightening without traditional braces. With the average case, the number of aligners in a series could be ________ aligners per case.
 a. 1 to 8
  b. 10 to 30
  c. under 5
  d. none of the above
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gomezagomeza
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6 years ago
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6 years ago
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