龋洞 qǔ dòng牙齿龋洞治疗称为龋洞充填术，俗称补牙。龋洞治疗的目的是终止龋坏的发展，恢复牙齿的外形，如牙尖和邻接点的重建；达到恢复牙齿的功能；同时保护了牙髓组织。
龋洞大，内有增生的软组织。
Macroscopic observation: a big cavity with hyperplastic soft tissue.
龋洞很深，在钻牙前我将给您打一针麻药。
The decay is very deep, so I will use a local anesthetic before drilling.
龋洞就是细菌侵蚀的表现，酸类物质会导致牙齿上逐渐出现孔洞。
Cavities are a bacterial infection created by acids, that cause your teeth to experience a hole in them.
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