牙髓和根尖周组织疾病 Diseases of pulp and periapical tissues
牙髓和根尖周组织其他和未特指的疾病 Other and unspecified diseases of pulp and periapical tissues
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根尖周组织中以慢性炎细胞浸润为主，未见有微生物。
Infiltration of chronic inflammation cell was discovered in periapical tissues with no microorganism observed.
结果显示：MPU-03材料对根尖周组织的刺激性明显轻于常规的糊剂牙胶尖充填材料（P＜0．01）。
The result indicated that the irritation of the MPU 03 material on periapical tissue was less than the root canal sealer and Guttapercha( P< 0.01).
乳牙根充糊剂除需具有恒牙根充糊剂的特性外，还需具有充填后能与乳牙牙根同步吸收、对乳牙根尖周组织和恒牙牙胚无害等性质。
Root canal filling pastes for primary tooth have to meet more needs than paste for permanent tooth, such as being absorbed with root simultaneously and doing no harm to permanent tooth germ.
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