体外牙冠颈部引流孔的实验设计

Experimental design of in-vitro drainage pinhole in dental cervix

目的:探索牙冠颈部建立引流孔的可行性。方法:选择因外伤、牙周病或正畸需要拔除的牙齿100个,在牙冠唇颊面颈中1/3钻两个小孔,插入已预处理的小儿头皮静脉输液针进行牙髓腔冲洗,观察钻孔成功情况。结果:38个前牙钻孔成功率达100.0%;30个双尖牙28个成功,成功率为93.3%;32个磨牙22个成功,成功率为68.8%。小儿头皮静脉输液针与钻孔匹配,有一定阻力感但能顺利插入钻孔。结论:牙冠唇颊面颈中1/3建立引流孔基本可行。

Objective：To investigate feasibility of pinhole drilled in dental cervix of crown of tooth.Methods：A total of 100 extracted teeth due to trauma or periodontal disease or dental orthopaedics were selected for this study.Two pinholes were drilled in middle 1/3 dental cervix of buccal labial surface of crown of tooth,infant transfusion needle processed was inserted into pinhole and pulp chamber was irrigated immediately.The success rate was observed.Results：Success rate was 100.0% in front teeth（incisor and canines）;28 of 30 premolar succeed accounting for 93.3%;22 of 32 molar succeed accounting for 68.8%.The infant transfusion needle matched and contacted tightly with pinhole.It was inserted into the pinhole smoothly.Conclusions：It is feasible to drill pinhole in the middle 1/3 dental cervix of buccal labial surface of crown of tooth.