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

doi:10.3969/j.issn.2095-4344.2016.25.017

Abstract

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.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

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

CLC Number:

R318

Lan Yu-yan, Pu Lin, Huang Hai-xia, Fan Li-yuan, Liu Min, Sun Li-bo. Effects of immediate versus delayed post space preparation on coronal microleakage using different filling materials[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(25): 3757-3763.

Figures/Tables 3

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