Effect of post length on endodontically treated teeth: fracture resistance
Braz. j. oral sci
;
9(3): 371-375, July-Sept. 2010. ilus, tab
Article
in English
| LILACS, BBO
| ID: lil-578058
ABSTRACT
Aim:
This study compared the fracture resistance of endodontically treated teeth restored with posts and cores systems with different post lengths.Methods:
Sixty extracted intact canines were randomly divided in 6 groups of 10 teeth each, as follows groups 1, 2 and 3 were restored with custom cast post-and-core, and groups 4, 5 and 6 were restored with prefabricated post and composite resin core, with different post lengths (5.0, 7.5 and 10 mm, respectively). A compressive load was applied at a 45-degree angle to the long axis until failure occurred.Results:
Two-way analysis of variance (á=0.05) showed statistically significant difference between the groups(p<0.001). However, when the mean fracture forces for the groups were compared (group 1254.4 N; groups 2, 3, 4, 5, 6 331.7 N, 434.7 N, 405.4 N, 395.6 N and 393.8 N, respectively),no significant differences could be detected among the three groups restored with prefabricated post and group 3.Conclusions:
This study showed that an increased post length in teeth restored with prefabricated posts does not significantly increase the fracture resistance of endodontically treated teeth. On the other hand, endodontically treated teeth restored with custom cast-post and core showed significant increase on fracture resistance when the post length is increased.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth Fractures
/
Tooth Root
/
In Vitro Techniques
/
Post and Core Technique
Limits:
Humans
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2010
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Rio Grande do Sul/BR
/
University of South of Santa Catarina/BR
/
University of São Paulo/BR
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