Teeth after cleaning. Close-up of the lower teeth of a 24-year-old man after cleaning to remove tartar build up. Tartar (calculus) is a form of hardened dental plaque that builds up on and between teeth. It is caused by the precipitation of minerals from saliva and gingival crevicular fluid (GCF) from plaque.

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TOP19257583

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達志影像

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RM

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須由TPG 完整授權

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