Sealing ability, water sorption, solubility and toothbrushing abrasion resistance of temporary filling materials.
OBJECTIVE
To evaluate marginal seal, water sorption, solubility and loss of mass after brushing of several temporary filling materials.


METHODS
For marginal seal, Class I cavities, including endodontic access preparations, were made in human molar teeth and restored using one or other of several temporary filling materials (n = 10): zinc oxide/calcium sulphate-based cement (Cavit, 3M,ESPE, St. Paul, MN, USA), zinc oxide/eugenol cement (IRM, Dentsply Caulk, Milford, DE, USA), glass ionomer cement (Vidrion R, SSWhite, Rio de Janeiro, RJ, Brazil) or a dimethacrylate-based filling (Bioplic, Biodinâmica, Londrina, PR, Brazil). Dye penetration was assessed after thermocycling and immersion in 0.5% basic fuchsine solution. For water sorption, solubility and loss of mass analyses, disc-shaped specimens were made. Water sorption and solubility were evaluated by mass alteration after storage in distilled water for 7 days (n = 7). Loss of mass was calculated based on the difference of mass after abrasion with a toothbrush (n = 5), and surfaces were analysed by SEM. Data of water sorption, solubility and loss of mass were submitted to anova and Tukey's test, and marginal sealing data to Kruskal-Wallis test (P < 0.05).


RESULTS
Statistically significant differences were observed for marginal sealing (P < 0.0001), water sorption (P < 0.01), solubility (P < 0.01) and loss of mass (P < 0.05). Bioplic had the best marginal seal. Cavit had the greatest water sorption and solubility. Vidrion R and Bioplic had the lowest solubility. Loss of mass after brushing was higher for Cavit, followed by Bioplic, IRM and Vidrion R. Cavit and Vidrion R were worn aggressively by brushing.


CONCLUSIONS
The resin-based temporary filling Bioplic produced the best marginal seal, and was associated with the lowest water sorption, solubility and loss of mass.
Pieper
C M
CM
Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
Zanchi
C H
CH
Rodrigues-Junior
S A
SA
Moraes
R R
RR
Pontes
L S
LS
Bueno
M
M
D000042:Absorption; D000327:Adsorption; D002133:Calcium Sulfate / Q000737:chemistry; D004396:Coloring Agents; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003738:Dental Cements; D003763:Dental Leakage / Q000145:classification; D019554:Dental Restoration Wear; D003794:Dental Restoration, Temporary; D004338:Drug Combinations; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011145:Polyvinyls / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D018915:Root Canal Preparation; D012394:Rosaniline Dyes; D012995:Solubility; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014099:Toothbrushing / Q000295:instrumentation*; D014867:Water / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
D004396:Coloring Agents; D003738:Dental Cements; D004338:Drug Combinations; D005899:Glass Ionomer Cements; D008689:Methacrylates; D008768:Methylmethacrylates; D011145:Polyvinyls; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012394:Rosaniline Dyes; C100647:Vidrion-R; D015035:Zinc Oxide-Eugenol Cement; D014867:Water; C025485:basic fuchsin; C031667:IRM cement; C020872:Cavit; D015034:Zinc Oxide; D002133:Calcium Sulfate