Fracture strength of flared bovine roots restored with different intraradicular posts
J. appl. oral sci
;
17(6): 574-578, Nov.-Dec. 2009. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-534422
ABSTRACT
OBJECTIVE:
The aim of this study was to evaluate the fracture strength and failure mode of flared bovine roots restored with different intraradicular posts. MATERIAL ANDMETHODS:
Fifty bovine incisors with similar dimensions were selected and their roots were flared until 1.0 mm of dentin wall remained. Next, the roots were allocated into five groups (n=10) GI- cast metal post-and-core; GII- fiber posts plus accessory fiber posts; GIII- direct anatomic post; GIV- indirect anatomic post and GV- control (specimens without intraradicular post). A polyether impression material was used to simulate the periodontal ligament. After periodontal ligament simulation, the specimens were subjected to a compressive load at a crosshead speed of 0.5 mm/min in a servo-hydraulic testing machine (MTS 810) applied at 135¨¬ to the long axis of the tooth until failure. The data (N) were subjected to ANOVA and Tukey's post-hoc test (¥á=0.05).RESULTS:
GI and GIV presented higher fracture strength (p<0.05) than GII. GIII presented intermediate values without statistically significant differences (p>0.05) from GI, GII and GIV. Control specimens (GV) produced the lowest fracture strength mean values (p<0.05). Despite obtaining the highest mean value, GI presented 100 percent of unfavorable failures. GII presented 20 percent of unfavorable failures. GIII, GIV and GV presented only favorable failures.CONCLUSIONS:
Although further in vitro and in vivo studies are necessary, the results of this study showed that the use of direct and indirect anatomic posts in flared roots could be an alternative to cast metal post-and-core.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Fraturas dos Dentes
/
Raiz Dentária
/
Técnica para Retentor Intrarradicular
Limite:
Animais
Idioma:
Inglês
Revista:
J. appl. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2009
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
State University of Campinas/BR
/
São Paulo State University/BR
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