Effects of different tapered gutta-percha cones with cold lateral condensation technique on apical seal

    loading  Checking for direct PDF access through Ovid

Abstract

BACKGROUND:

A nickel-titanium instrument with big taper angle is gradually applied in clinic due to its excellent taper angle and appearance. However, it is poorly understood whether greater tapered gutta-percha cones has good effect on apical seal.

OBJECTIVE:

To verify the effect of gutta-percha cone with different tapered angles on apical area sealing.

DESIGN, TIME AND SETTING:

A comparison observation experiment was performed at the Department of Stomatology and Center Laboratory of People's Hospital of Peking University from December 2008 to February 2009.

MATERIALS:

Thirty-one extracted the first maxillary premolars teeth with completed root formation were collected.

METHODS:

Thirty teeth were randomly divided into 0.02 tapered angle (n=10), 0.04 tapered (n=10) angle 0.06 tapered angle (n=10) groups after MTWO preparation, which was filled with three different master cones and obturated with cold lateral condensation. The remained tooth was served as control group.

MAIN OUTCOME MEASURES:

The apical leakage was evaluated by the linear measurement combined with transparent specimen method, and the ability of apical seal was measured.

RESULTS:

The dye penetration of positive control group was along the whole canals. The length of penetration were (1.655±0.426) mm, (1.210±0.367) mm and (1.100±0.462) mm in 0.02 tapered angle, 0.04 tapered angle and 0.06 tapered angle groups, respectively. The apical sealing ability of 0.04 tapered angle group and 0.04 tapered angle group had no significant difference (P > 0.05). While the length of penetration had statistical differences between 0.02 tapered angle group and 0.06 tapered angle group (P < 0.05) or 0.02 tapered angle group and 0.06 tapered angle group (P < 0.05).

CONCLUSION:

Better apical seal can be obtained when using the big cones and obturated with cold lateral condensation after MTWO treatment.

Related Topics

    loading  Loading Related Articles