How to remove dental calculus and odontolith?

怎样除去牙垢和牙石 呢 ?

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What are dental calculus and odontolith?

什么是牙垢和牙石?

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Can we prevent dental calculus and odontolith?

牙垢和牙石可以预防 吗 ?

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Objective : To observe the crystal character of the attached end and free end of dental calculus.

目的: 观察牙结石附着面和游离面晶体构型的差异.

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