Fracture resistance of endodontically treated teeth restored with different intraradicular posts with different lengths
Braz. j. oral sci
;
12(1): 1-4, jan.-mar. 2013. tab
Article
in English
| LILACS, BBO
| ID: lil-671923
ABSTRACT
Aim:
This study compared the resistance to fracture of endodontically treated teeth restored with different intraradicular posts with different lengths and full coverage metallic crowns.Methods:
Sixty extracted human canine teeth were randomly divided into 6 groups. Groups CP5, CP75 and CP10 were restored using custom cast post and core (CP) and groups PF5, PF75 and PF10 were restored with provisional pre-fabricated tin post (PF) and composite resin core at 5 mm, 7.5mm and 10 mm of intraradicular length, respectively. The specimens were submitted to dynamic cyclic loading and those that resisted to this load were submitted to load compression using auniversal testing machine. Compressive load was applied at a 45-degree angle to the long axis of the tooth until failure.Results:
Kruskal-Wallis one-way analysis of variance by ranks showed statistically significant differences among the groups (p<0.0001). However, when the means were compared using the Tukeys test, significant differences were noted between groups CP5 and CP10 and between groups CP10 and PF5. All groups presented root fractures and post displacements during mechanical cycling. All teeth in groups CP5 and PF5 failed the dynamic cycling test.Conclusions:
This study showed that increasing intraradicular post length also increases resistance to fracture of endodontically treated teeth. On the other hand, most endodontically treated teeth restored with pre-fabricated tin posts (provisional posts) failed in thedynamic cycling test.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Root Canal Therapy
/
Stress, Mechanical
/
Prosthesis Failure
/
Post and Core Technique
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2013
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade de São Paulo/BR
/
Universidade do Sul de Santa Catarina/BR
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