Resin cement thickness in oval-shaped canals: Oval vs. circular fiber posts in combination with different tips/drills for post space preparation
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
19/10/2012
19/10/2012
2009
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Resumo |
Purpose: To evaluate the cement thickness around oval and circular posts luted in oval post spaces prepared with different drills/tips. Methods: Extracted premolars were endodontically treated and obturated, then randomly divided into three groups (n = 5) according to the tips/drills used for post-space preparation and to the type of fiber post luted: medium grit oval tip + oval posts, fine grit oval tip + oval posts, Mtwo Post File drill + circular posts. The specimens were sectioned in horizontal slices; one slice per canal third was chosen for each post-space, resulting in three slices for each specimen. The distances between the canal wall and the post perimeter were measured on SEM images of each slice. Results: The fine grit tip + oval post group obtained statistically significant lower cement thicknesses than the other groups (P < 0.05), in particular in the apical third. The MtwoPF + circular post group showed the highest cement thickness, comparable to that of the medium tip + oval post group. A good post fitting in oval-shaped canals can be obtained using a fine grit oval tip combined with oval posts. (Am J Dent 2009;22:290-294). |
Identificador |
AMERICAN JOURNAL OF DENTISTRY, v.22, n.5, p.290-294, 2009 0894-8275 |
Idioma(s) |
eng |
Publicador |
MOSHER & LINDER, INC |
Relação |
American Journal of Dentistry |
Direitos |
closedAccess Copyright MOSHER & LINDER, INC |
Palavras-Chave | #ENDODONTICALLY TREATED TEETH #CLINICAL-PERFORMANCE #ROOT CANALS #INSTRUMENTS #STRENGTH #DENTIN #LAYER #HAND #Dentistry, Oral Surgery & Medicine |
Tipo |
article original article publishedVersion |