深龋乳牙冠髓改变与洞底牙质厚度关系的研究

THE STUDY OF RELATIONSHIP BETWEEN THE CORONAL PULPAL HISTOPATHOLOGICAL CHANGES AND THE DENTINAL THICKNESS OF CAVITY BASALPART IN DECIDUOUS TEETH WITH DEEP DENTIN CARIES

目的 :探讨乳牙深龋冠髓病理学改变严重程度与其洞底剩余牙本质厚度间关系的临床意义。方法 :随机选择面深龋乳磨牙 4 5颗行活髓切断术 ,光镜下观察其冠髓病理改变 ;测量窝洞底剩余牙本质最薄处厚度。结果 :77.8%的冠髓组织有不同程度的慢性炎症和慢性牙髓炎急性发作。冠髓病理改变分级与其洞底剩余牙本质厚度间的等级相关分析 :r′s=- 0 .4 17,P <0 .0 0 5,两者存在负相关关系。结论 :深龋乳牙洞底剩余牙本质越薄 。

Objective:To study the clinical significance of the relationship between the coronal pulpal histopathological changes and the dentinal thickness of cavity basalpart in deciduous teeth with deep dentin caries. Methods:45 deciduous molars with occlusal deep caries were selected at random.The patient did not receive any antibiotic for one month. Coronal pulpal histopathological changes were observed with optical microscopic technique. 45 residual dentinal thicknesses of cavity basalpart were measured accurately. Results:Coronal pulp tissue of 77.8% of deciduous teeth with deep caries showed chronic inflammation to various degree or chronic pulpitis with acute attack. There was a negative correlation between the grade of coronal pulpal histopathological changes and the dentinal thicknesses of cavity basalpart in 45 deciduous molars with deep dentin caries (r′ s=-0.417,P<0.005). Conclusion:The thiner the residual dentinal thickness of cavity basalpart was, the more serious inflammation appeared in coronal pulp tissue of deciduous teeth with deep caries.