Microbial leakage of Cavit, IRM and Tem Bond in post prepared root canals using two methods of gutta-percha removal: In vitro study

Journal Article

H, Balto, . 2005

• رقم العدد: 3
• رقم الإصدار السنوي: 6
• الصفحات: 1-8

مستخلص المنشور

The aim of this study was to evaluate the integrity of the coronal seal of Temp-Bond and compare it to

Cavit and IRM after post space preparation using S. faecalis as a microbial tracer. In addition, the affect

of two methods of gutta percha removal on the apical seal of root canal fillings was also evaluated. Forty

extracted human single rooted teeth were prepared chemomechanically and obturated with gutta percha and

AH26 sealer cement using the lateral cold condensation technique to a standardized working length of 15

mm. About 10 mm of the coronal gutta-percha was removed with either Peeso-reamer or a hot plugger. The

roots were divided into three experimental groups of 10 roots and a control group. Each experimental group

was subdivided equally into two groups of 15 each according to the method of post space preparation. Cavit,

IRM, and Temp-Bond were used to seal the access opening. Each root was fixed in a cuvette containing

Tryptic Soya Broth which, covered 2 mm of the root apex. Bacterial suspension was introduced through

pipette. Fresh bacterial suspension was added every week, and the system was monitored daily for the growth

of microorganisms for a period of one month. The results showed there was no significant difference in terms

of coronal leakage between the three coronal materials used (P=0.478), but the methods of gutta-percha

removal did have an impact on the apical leakage (P=0.047). The mean value showed the Peeso-reamer

provided less leakage compared to using a hot plugger during the 30-day experimental time period. It was 

concluded the temporary type of coronal seal of endodontically treated teeth will not prevent coronal leakage if

left for a long period of time. In addition, permanent cementation of the post with the coronal restoration should

be carried out as soon as possible to prevent recontamination of the root canal.

Keywords: S. faecalis, leakage of Cavit, IRM and Temp-Bond, gutta-percha removal