Protaper器械治疗不可复性牙髓炎中残髓与IAE关系的临床研究

目的：探讨Protaper镍钛器械根管预备不可复性牙髓炎后残髓与IAE的关系。方法：按Crown-down预备技术进行根管预备,约诊时记录初次预备后是否疼痛和发生时间、程度并做再次清理预备,仔细观察是否存在残髓和预备过程疼痛与否,必要时行多次清理和预备。结果：第1次预备后疼痛者往往在第2次预备时发现残髓。结论：残髓的存在是导致根管治疗期间疼痛应足够重视的原因之一,约诊期间最好行二次或以上次数的根管清理和预备。

Clinical study of relation of the residual pulp and the IAE on treatment of irreversible pulpitis by Protaper Ni-Ti instrument

Objective To investigate their relationship between the residual pulp and the IAE on root canal preparation of irreversible pulpitis by Protaper nickel-titanium instruments. Methods Root canal preparation was made by crown-down technique.The time and extent of pain were recorded after the first root canal preparation.And then,a clear preparation was again made,to carefully observe whether there is residual pulp and pain in preparation process. If necessary,many times of cleaning and preparation were used. Results Residual pulp were often found at the second preparation,when the pain was found after the first preparation. Conclusion Residual pulp was lead to one of the pain reasons during root canal therapy.It should be sufficient attention.Two times and more times root canal cleaning and preparation should used during appointment.