It is conventionally performed through a hole drilled into the crown of the affected tooth, namely orthograde root canal therapy.
根管治疗手术通常通过在受影响的牙齿牙冠中钻孔完成，即矫正根管治疗。
He argues that tooth crowns and roots have a high genetic component, minimally affected by environmental and other factors.
他认为，牙冠和牙根有很多的遗传成分，受环境和其他因素的影响很小。
Locals were suffering from tooth decay and bone degeneration. Agricultural production was also adversely affected.
当地人饱受牙齿受损和骨质酥松的痛苦，农作物的生长也受到严重影响。
The evaporation is affected by temperature and wearing condition of gear tooth flank.
汽化程度与齿面温度及磨损状态有关。
The evaporation is affected by temperature and wearing condition of gear tooth flank.
汽化程度与齿面温度及磨损状态有关。
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