多聚甲醛失活磨牙牙髓效果的影响因素分析  

Evaluation of the influence factors on molar pulp devitalization with paraformaldehyde

作　　者：张为新 周水华 

机构地区：[1]上海奉贤区牙病防治所,上海201400

出　　处：《广东牙病防治》2015年第10期525-527,共3页Journal of Dental Prevention and Treatment

摘　　要：目的探讨影响多聚甲醛失活磨牙牙髓效果的因素。方法选择240颗患牙髓炎的磨牙,用多聚甲醛进行牙髓失活。按照开髓孔面积随机分成3组,开髓孔直径分别为小于1 mm、1--2 mm和大于2 mm。每组患牙再按失活剂放置时间均分成3个亚组,分别为失活剂放置10 d、14 d、18 d。以牙髓摘除时的疼痛程度判断失活效果,分析开髓孔面积和失活剂放置时间对失活效果的影响。结果磨牙开髓孔直径小于1 mm、1-2 mm和大于2 mm的磨牙失活成功率为0%、73.33%和94.44%,3种开髓孔大小的磨牙失活效果差异有统计学意义（P〈0.05）。延长放置时间不能显著提高失活效果。结论延长多聚甲醛放置时间不能显著提高多聚甲醛失活磨牙牙髓的效果。磨牙开髓孔面积对多聚甲醛失活效果有显著影响,开髓孔直径大于2 mm时,失活效果最佳。Objective To investigate the influence factors on molar pulp devitalization with paraformaldehyde. Methods 240 molars which were diagnosed as pulpititis were devitalized with paraformaldehyde. The molars were randomly divided into three groups according to the opening dimensions of pulp chamber. The diameter of opening was 1 mm,1- 2 mm or 2 mm respectively. Each group was also randomly divided into three sub-groups according to the duration of pulp devitalization. The duration was 10, 14 or 18 days respectively. The results of pulp devitalization were evaluated by pain index during pulpectomy. The effects of opening dimensions of pulp chamber and duration were assessed on the results of pulp devitalization. Results The total success rate of molar pulp devitalization was 0%（ 1 mm）, 73. 33%（1- 2 mm） and 94. 44%（ 2 mm） respectively, the difference was significant（P〈0. 05）. The prolonged duration could not significantly enhance the success rate of molar pulp devitalization. The age didn＇t influence pulp devitalization with paraformaldehyde. Conclusion There was no effect of duration and age of pulp devitalization with paraformaldehyde. The opening dimensions of pulp chamber could significantly influence the success rate of molar pulp devitalization.The effect of pulp devitalization was best when the opening diameter of pulp chamber were 2 mm.

关 键 词：多聚甲醛 牙髓失活 磨牙 影响因素 

分 类 号：R781.3[医药卫生—口腔医学]