Fracture resistances of pulpless teeth restored with two kinds of cast metal post-core or glass-fiber post with a composite core / 实用口腔医学杂志
Journal of Practical Stomatology
; (6)2000.
Article
in Chinese
| WPRIM (Western Pacific)
| ID: wpr-670550
Responsible library:
WPRO
ABSTRACT
Objective:
To compare the fracture resistance of pulpless teeth restored with three types of post core.Methods:
A total of 21 recently extracted sound upper incisors were randomly distributed into 3 groups. In group A the teeth were restored with prefabricated glass fiber post and composite core; in group B with custom cast titanium alloy post and core; and in group C with Ni Cr alloy dowel core. The size and shape of posts were identical in the 3 groups. All teeth were fully covered with Ni Cr alloy cast crown. Fracture resistance was measured by applying a point force at 130 degrees to the long axis of the teeth.Results:
Mean fracture threshold was (276.6?15.1)N in group A, (394.7?29.1)N in group B and (373.4? 53.8 )N in group C. In group B and C, however, fracture always affected the tooth itself,whereas in group A,the core always failed first.Conclusion:
Fiber reinforced composite(FRC) post may meet the clinical need, FRC post combined with composite core may prevent tooth root from fracture.
Full text:
Available
Database:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Journal of Practical Stomatology
Year:
2000
Document type:
Article