Retention, marginal leakage, and cement solubility of provisional crowns cemented with temporary cement containing stannous fluoride.
OBJECTIVE
This in vitro study investigated the (1) retention and microleakage of provisional crowns cemented with temporary cements to which stannous fluoride (SnF2) was added, and (2) solubility of these cements.


METHODS
Provisional crowns were constructed of acrylic resin with shoulder preparations for 12 molars. The crowns were luted with Tempbond, Tempbond NE, and Freegenol temporary cements, and also with SnF2 added to these cements. Specimens were thermocycled 100 times, stored for 6 days, and immersed in 0.5% basic fuschin. Seven days after cementation, crown removal (retention) tests were conducted. Marginal leakage was assessed using a five-level scale to score dye penetration. Solubility in water of the cements with and without SnF2 was assessed using cement disks.


RESULTS
Freegenol was more retentive than the other cements. The incorporation of SnF2 significantly increased the retention capacity of Freegenol and Tempbond NE but had no effect on Tempbond. Tempbond showed significantly higher dye penetration than Freegenol. The addition of SnF2 did not alter the dye penetration of the cements. There were no significant differences in the solubility of the cements. However, the incorporation of SnF2 increased the solubility of Freegenol and Tempbond NE (P < .001) and Tempbond (P < .01).


CONCLUSIONS
The addition of SnF2 increased the retention of temporary crowns cemented with Tempbond NE and Freegenol but did not affect the retention of those cemented with Tempbond. The marginal leakage of crowns cemented with the tested temporary cements with and without the incorporation of SnF2 was similar. However, the addition of SnF2 increased the solubility of the cements.
Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, University of Tel Aviv, Israel. lewins@post.tau.ac.il
Israel
I
Lewinstein
Nitzan
N
Fuhrer
Katerina
K
Gelfand
Harold
H
Cardash
Raphael
R
Pilo
D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D002327:Cariostatic Agents / Q000737:chemistry*; D003442:Crowns; D003738:Dental Cements / Q000737:chemistry*; D017005:Dental Debonding; D003763:Dental Leakage / Q000145:classification*; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D003794:Dental Restoration, Temporary; D005054:Eugenol / Q000737:chemistry; D006801:Humans; D008899:Mineral Oil / Q000737:chemistry; D012394:Rosaniline Dyes; D012995:Solubility; D013816:Thermodynamics; D013997:Time Factors; D014002:Tin Fluorides / Q000737:chemistry*; D019231:Tooth Preparation, Prosthodontic; D015034:Zinc Oxide / Q000737:chemistry; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
D000180:Acrylic Resins; D002327:Cariostatic Agents; D003738:Dental Cements; C078077:Freegenol; D012394:Rosaniline Dyes; C474196:Tempbond NE; D014002:Tin Fluorides; D015035:Zinc Oxide-Eugenol Cement; D005054:Eugenol; C025485:basic fuchsin; C076899:Temp-Bond; D008899:Mineral Oil; D015034:Zinc Oxide