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Dr. Daniel Cassidy stops by to check on Tina Colby, a regular patient as Sidney Siewert begins the examination.

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"Open wide." Sidney Siewert offers her patient sunglasses because the light is bright and “so that the minty grit doesn't get in her eyeballs.” Siewert is a dental hygienist for Dr. Daniel Cassidy on Duke Street. She begins with a periodontal exam. "I'm checking her gums. We do this every couple of years so we can keep track of patterns." Cassidy stops by for a short chat. "How are her gums?" So far, so good. Siewert proceeds to the scaling of Tiny Colby's teeth that she says takes most of the hour appointment. "This is to clean the tartar from the teeth," Siewert said.

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