摘要
背景:目前临床上对于桩道预备的时机并没有达成一个共识,不过从一些研究可以推断出,桩道预备时机对经不同材料充填的根管会有一定影响。目的:比较即刻桩道预备和延迟桩道预备对经不同材料充填根管冠方微渗漏的影响。方法:将48颗离体人单根单管前磨牙随机分为6组,每组8颗:A1组以AH-plus糊剂+牙胶尖充填,行即刻桩道预备;A2组以矿物三氧化物凝聚体糊剂+牙胶尖充填,行即刻桩道预备;B1组以AH-plus糊剂+牙胶尖充填,充填1周后行延迟桩道预备;B2组以矿物三氧化物凝聚体糊剂+牙胶尖充填,充填1周后行延迟桩道预备;阴性对照组以AH-plus糊剂+牙胶尖充填;阳性对照组直接以牙胶尖充填。将6组标本在模拟口腔环境中浸泡4周,通过加压染料渗透法测量根管冠方微渗漏的长度。结果与结论:阴性对照组无渗漏,阳性对照组微渗漏显著,涉及整个根管。A2组和B2组微渗漏值无差异(P>0.05),A1组与A2组微渗漏值无差异(P>0.05),A1组、B2组微渗漏值低于B1组(P<0.05)。结果表明,延迟桩道预备对A H-plus糊剂填充根管微渗漏的影响较大。
BACKGROUND： At present, there is no consensus on the timing of post space preparation in the clinical medical treatment. But it can be inferred from some studies that post space preparation may affect coronal microleakage using different fil ing materials. OBJECTIVE： To compare the effects of immediate post space preparation and delayed post space preparation restoration on coronal microleakage using different fil ing materials. METHODS： Forty-eight extracted and single-rooted premolars were randomly divided into six groups （n=8 per group）： premolars were fil ed with AH-plus paste and gutta-percha with the immediate post space preparation as group A1; premolars fil ed with mineral trioxide aggregate paste and gutta-percha with the immediate post space preparation as group A2; premolars fil ed with AH-plus paste and gutta-percha with the delayed post space preparation 1 week later as group B1; premolars fil ed with mineral trioxide aggregate paste and gutta-percha with the delayed post space preparation after 1 week later as group B2;premolars fil ed with AH-plus paste and gutta-percha as negative control group; premolars fil ed with gutta-percha as positive control group. Afterwards, al specimens were soaked for 4 weeks under simulated oral environment to measure the length of coronal microleakage by pressurized dye penetration method. RESULTS AND CONCLUSION： No coronal microleakage was found in the negative control group, but serious coronal microleakage occurred in the positive control group involving the entire root canal. And there was no significant difference in the length of coronal microleakage between group A2 and B2, as wel as between group A1 and A2 （P 〉 0.05）; but the length of coronal microleakage in the group A1 and B2 was significantly less than that in the group B1 （P 〈 0.05）. These results show that the delayed post space preparation has overt effect on the coronal microleakage of root canal fil ed with AH-plus paste.
出处
《中国组织工程研究》
CAS
北大核心
2016年第25期3757-3763,3762+3759-3761+3763,共7页
Chinese Journal of Tissue Engineering Research
