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Effects of immediate versus delayed post space preparation on coronal microleakage using different filling materials / 中国组织工程研究
Chinese Journal of Tissue Engineering Research ; (53): 3757-3763, 2016.
Article in Chinese | WPRIM | ID: wpr-494074
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 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.
Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Tissue Engineering Research Year: 2016 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Tissue Engineering Research Year: 2016 Type: Article