Failure mode of tooth surface is varied such as teeth surface pitting, teeth wear, teeth bonding and teeth plastic deformations and so on.

齿面常见的失效形式有齿面点蚀、齿面磨损、齿面胶合和齿面塑性变形等。

youdao

Hanako is equipped with the set of teeth made of hard plastic and lifelike mouth cavity which can bleeds and flows saliva just as human reflects against stimuli.

花子配备的硬塑料和逼真的口腔出血了，可流动的唾液和牙齿，遇到刺激能像人类一样反响。

youdao

Sealants are thin, plastic coatings painted on the chewing surfaces of the back teeth.

牙齿保护胶是一种薄的塑料涂层，涂在磨牙的咀嚼面上。

youdao

Fenelon's is a plastic set of parallel vertical tracks with teeth.

FORBES: Technology

Many parents don't think twice about straightening their kids' crooked teeth but stop short of fixing a crooked nose, and yet, in just the past seven years, plastic surgery performed on teens has doubled.

CNN: ASIANOW - TIME Asia | Brainteaser