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本文尝试采用化学合成之粉末状羟基磷灰石（ＰＨＡ）作为乳磨牙感染根管治疗中的药物载体，利用其与药物结合后的缓释特性达到缩短疗程，减少复诊次数以及改善根充效果的目的。结果证实利用ＰＨＡ作为乳磨牙感染根管治疗的药物载体时，治疗效果明显优于以药棉为载体的常规方法，其中一次治疗即可完成根充者达７５％明显优于药棉组（４２．５％）（Ｐ＜０．０１），利用ＰＨＡ作为根充剂药物载体的观察结果证实其成功率（９７％）明显优于常规的氧化锌碘仿糊剂（７８％）（Ｐ＜０．０５），尤其在髓室底已穿的患牙，疗效更是明显高于常规碘仿糊剂。本文结合文献分析了ＰＨＡ治疗效果好的原因。
This paper attempts to use chemically synthesized powdered hydroxyapatite (PHA) as the drug carrier in the treatment of primary molar infection of deciduous molars. By utilizing its sustained-release properties after being combined with drugs to shorten the course of treatment, reduce the number of referrals and improve the root filling effect purpose. The results confirmed that the use of PHA as the drug carrier for root canal treatment of primary molar infection was significantly better than the conventional method of using cotton wool as a carrier. In one treatment, 75% %) (P <0.01). The results of using PHA as a drug carrier for root extender showed that the success rate (97%) was significantly better than that of conventional zinc iodide paste (78%) ), Especially in the pulp chamber has worn teeth, the effect is significantly higher than the conventional iodoform paste. This article combined with the literature analysis of the PHA treatment of good reasons.