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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

April 2011
Volume 42 , Issue 4

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Coronal leakage in endodontically treated teeth restored with posts and complete crowns using different luting agent combinations

Nissan, Joseph / Rosner, Ofir / Gross, Ora / Pilo, Raphael / Lin, Shaul

Pages: 317 - 322
PMID: 21516277

Objective: To evaluate the influence of different cement combinations on coronal microleakage in restored endodontically treated teeth using dye penetration. Method and Materials: Human, noncarious single-rooted extracted premolars (n = 60) were divided into four experimental groups (each n = 15). After endodontic treatment, different combinations of cements were used to lute prefabricated posts and complete crown restorations: zinc phosphate cement applied on posts and cast crowns (Z) or on zinc phosphate cement posts and resin cement applied on cast crowns (ZR); resin cement applied on posts and zinc phosphate cement applied on cast crowns (RZ); and resin cement applied on posts and cast crowns (R). After artificial aging through thermal cycling (5C to 55C) for 2,000 cycles at 38 seconds for each cycle and 15 seconds of dwell time, specimens were immersed for 72 hours in basic fuchsin at 37C. A buccolingual section was made through the vertical axis of specimens. A Toolmaker’s microscope (Mitutoyo) was used to measure (μm) dye penetration. The Kruskal-Wallis nonparametric test was used to determine intergroup difference. A nonparametric Mann-Whitney test compared each group regarding its maximal linear penetration depths on the mesial and distal aspects of each specimen (α = 0.05). Results: Dye staining was evident to some degree in all specimens. Among groups Z, ZR, and RZ, no significant difference was shown in dye-penetration depths (mean penetration scores 1,518 to 1,807 μm). However, dyepenetration depth was significantly lower in group R compared to the other groups (mean penetration score 1,073 μm) (P < .05). Conclusions: Under study conditions, the cement combination offering the best coronal sealing was the one using only resin cement for both posts and crown restorations.

Keywords: crowns, luting agents, posts, restorations

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