Premium
Effect of cleaning method, luting agent and preparation procedure on the retention of fibre posts
Author(s) -
Bitter K.,
Eirich W.,
Neumann K.,
Weiger R.,
Krastl G.
Publication year - 2012
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2012.02081.x
Subject(s) - root canal , materials science , gutta percha , universal testing machine , dentistry , scanning electron microscope , luting agent , stereo microscope , adhesive , composite material , bond strength , medicine , ultimate tensile strength , layer (electronics)
Bitter K, Eirich W, Neumann K, Weiger R, Krastl G. Effect of cleaning method, luting agent and preparation procedure on the retention of fibre posts. International Endodontic Journal . Aim To investigate the effects of various cleaning methods, luting agents and preparation procedures on fibre post retention. Methodology In total, 156 human canines were allocated to twelve groups. Teeth were decoronated, instrumented and root filled using warm vertical gutta‐percha compaction. Post space preparation was performed in 78 roots using the dedicated preparation drills of the DT Light Post SL system [group post drill ( PD )]. Gutta‐percha was removed from the other 78 roots using a round bur ( RB ) (group RB ). Within each of these two groups, 26 root canals were rinsed with 1% N a OC l (control), 26 were cleaned using rotating brushes and pumice powder, and 26 were sandblasted with A l 2 O 3 (50 μm) using an intraoral device. Cleanliness of each root canal was investigated using an operating microscope ( n = 24) and scanning electron microscope ( n = 2). Fibre posts were inserted using self‐adhesive resin cement ( S mart C em2) or core build‐up material ( C ore X F low/ XP B ond). Pull‐out force was measured using a universal testing machine. Statistical analyses were performed using three‐way anova and T ukey's HSD post hoc tests. Results Root canal cleanliness was not affected by the cleaning method ( P = 0.618, chi‐squared test). Pull‐out force for fibre posts was significantly affected by the cleaning method ( P = 0.008), the luting agent ( P < 0.0005) and the preparation procedure ( P < 0.0005, three‐way anova ). RB group demonstrated significantly higher pull‐out forces [399 (88) N ] compared with PD group [287 (105) N ]. Posts that were inserted using C ore X F low/ XP Bond exhibited significantly higher pull‐out forces [370 (62) N ] compared with posts inserted using S mart C em2 [315 (141) N ]. Conclusion The different cleaning methods did not lead to significant differences in root canal cleanliness and did not enhance fibre post retention inside the root canal. However, post space preparation using a RB might be beneficial for improving retention, especially when self‐adhesive cements are used. The use of the core build‐up material C ore X F low/ XP Bond instead of the self‐adhesive resin cement, S mart C em 2, resulted in significantly higher pull‐out force.