结论：纳米氧化锌糊剂、羟磷灰石糊剂和纳米羟磷灰石糊剂具有良好的组织相容性和根尖封闭性，可以作为根管封闭剂用于根管充填。
Conclusion: Nano-zinc-oxide, hydroxyapatite and nanohydroxyapatite have favorable histocompatibility and excellent apical sealing ability, so they are suitable for root filling as root canal sealers.
方法采用比重法、容量替代法、容量加和法，分别对溃疡糊、水晶膏、氧化锌搽剂进行最低装量检查。
METHODS: The minimum loading capacities of ulcer paste, crystal ointment and zinc oxide liniment were examined by specific gravity method, capacity substitution method and capacity addition method.
方法采用比重法、容量替代法、容量加和法，分别对溃疡糊、水晶膏、氧化锌搽剂进行最低装量检查。
METHODS: The minimum loading capacities of ulcer paste, crystal ointment and zinc oxide liniment were examined by specific gravity method, capacity substitution method and capacity addition method.
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