中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (25): 3757-3763.doi: 10.3969/j.issn.2095-4344.2016.25.017

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

桩道预备时机及充填材料对根管冠方微渗漏的影响

兰玉燕,蒲 琳,黄海霞,范丽苑,刘 敏,孙黎波   

  1. 四川西南医科大学附属口腔医院口腔修复科及口颌面修复重建和再生实验室,四川省泸州市  646000
  • 收稿日期:2016-04-01 出版日期:2016-06-17 发布日期:2016-06-17
  • 通讯作者: 蒲琳,女,硕士,主治医师,主要从事口腔修复研究。
  • 作者简介:兰玉燕,女,1986 年生,汉族,2009年泸州医学院毕业,硕士,主治医师,主要从事口腔种植修复研究。

Effects of immediate versus delayed post space preparation on coronal microleakage using different filling materials

Lan Yu-yan, Pu Lin, Huang Hai-xia, Fan Li-yuan, Liu Min, Sun Li-bo   

  1. Department of Prosthodontics, Laboratory of Orofacial Reconstruction and Regeneration, the Affiliated Stomatology Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Received:2016-04-01 Online:2016-06-17 Published:2016-06-17
  • Contact: Pu Lin, Master, Attending physician, Department of Prosthodontics, Laboratory of Orofacial Reconstruction and Regeneration, the Affiliated Stomatology Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Lan Yu-yan, Master, Attending physician, Department of Prosthodontics, Laboratory of Orofacial Reconstruction and Regeneration, the Affiliated Stomatology Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China

摘要:

 文章快速阅读:

 

文题释义:
冠方微渗漏:
是导致根管治疗失败的重要因素。体外研究证明,根管充填后髓腔暴露于唾液中几日,唾液就能渗入到根管全长的33%-85%,超过3个月后就需要重新进行治疗。临床上修复体不良的边缘封闭性、不严密的暂封及桩道预备取模过程带来的污染,都有可能侵入到根管充填物与牙本质内壁之间,特别是在桩道预备后,充填材料长度减少,明显增加了微渗漏发生的概率,因此严密的冠向充填是形成良好屏障的必要条件。
染料渗透法评估微渗漏:①纵切法,将牙齿沿中轴纵向切开,然后用显微镜进行观察。纵切法可能会导致部分的染料和牙体组织丢失,影响实验数据的准确性。②透明技术法,将样本经硝酸脱矿,乙醇脱水,水杨酸甲酯透明后,在显微镜下三维观察充填材料的染料渗透情况。此种方法无需破坏标本,是目前较为常用的方法。

 

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AH-plus糊剂填充根管微渗漏的影响较大。

ORCID: 0000-0002-2324-5233(兰玉燕) 

关键词: 生物材料, 口腔生物材料, 冠方微渗漏, 即刻桩道预备, 延迟桩道预备, AH-plus, 矿物三氧化物凝聚体

Abstract:

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 filling materials.

 

OBJECTIVE: To compare the effects of immediate post space preparation and delayed post space preparation restoration on coronal microleakage using different filling materials.

 

METHODS: Forty-eight extracted and single-rooted premolars were randomly divided into six groups (n=8 per group): premolars were filled with AH-plus paste and gutta-percha with the immediate post space preparation as group A1; premolars filled with mineral trioxide aggregate paste and gutta-percha with the immediate post space preparation as group A2; premolars filled with AH-plus paste and gutta-percha with the delayed post space preparation 1 week later as group B1; premolars filled with mineral trioxide aggregate paste and gutta-percha with the delayed post space preparation after 1 week later as group B2; premolars filled with AH-plus paste and gutta-percha as negative control group; premolars filled with gutta-percha as positive control group. Afterwards, all 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 well 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 filled with AH-plus paste.

 

 

 

Key words: Molar, Root Canal Filling Materials, Tissue Engineering

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