首先，我要在牙齿的顶端(牙冠)开一个口，使受感染的牙髓暴露出来。
First, I'll make a small opening in the top (crown) of the tooth to expose the infected pulp..
引起牙髓暴露的原因较多，但最常见的病因是龋病因素和机械性损伤。 如果是制备洞形过程中的意外穿髓，人们往往选择盖髓治疗。
There are a lot of causes that lead to pulp exposure , but the most common reasons are dental caries and mechanical injury.
方法：通过人工机械性暴露犬牙髓后行即刻盖髓和延迟24小时盖髓。
Methods:The pulpal response to mechanical exposure and capping either immediately or after 24 hours was investigated in dogs.
方法：人工机械暴露犬牙髓，用MTA或氢氧化钙直接盖髓。
METHODS: Capping the pulp with either MTA or Calcium hydroxide after the pulp had been exposed mechanically.
方法：人工机械暴露犬牙髓，用MTA或氢氧化钙直接盖髓。
METHODS: Capping the pulp with either MTA or Calcium hydroxide after the pulp had been exposed mechanically.
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