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作者用过硼酸钠粉末和35%双氧水对变色的无髓牙进行漂白,二者混合后立即产生大量氧气。预先用牙胶尖充填根管,根管口用粘固粉密封、防止氧气进入根管。髓腔内进行修整,特别注意髓室角部的清理,磨去薄层变色牙质使露出新面,用浸有氯仿或二甲苯的棉球清洗髓腔壁,用热气吹干.然后用直径2mm～5mm小棉球浸湿双氧水,放入过硼酸钠粉末中,使小棉球周围沾满过硼酸钠,迅速填入髓腔内,根据髓腔大小可填入4～6个棉球,沾满漂白剂的棉球填满髓腔后,用
The authors used bleached sodium borate powder and 35% hydrogen peroxide to bleach discolored uncured teeth, generating large amounts of oxygen immediately after mixing. Pre-gutta-perfumed root canal root canal mouth with cement seal, to prevent oxygen into the root canal. Medullary cavity for trimming, paying particular attention to the corner of the clean room, wear thin layer of discolored dentin to expose the new surface, with a cotton ball soaked in chloroform or xylene wash the medullary cavity wall, dry with hot air and then use the diameter 2mm ~ 5mm small cotton ball wetting hydrogen peroxide, into the sodium perborate powder, cotton balls soaked around the sodium perborate, quickly filled into the medullary cavity, according to the size of the medullary cavity can be filled with 4 to 6 cotton balls, Bleached cotton balls filled with bleach, with