članak: 1 od 1  
Balkan Journal of Stomatology
2007, vol. 11, br. 2, str. 129-132
jezik rada: engleski
izvorni članak
Scanning electron microscopic observation of the effect of calcium hydroxide on the adhesion of a resin system to dentin
(naslov ne postoji na srpskom)
aDepartment of Paedodontics, Faculty of Dentistry, Bornova, Izmir, Turkey
bDepartment of Endodontics, Faculty of Dentistry, Bornova, Izmir, Turkey

e-adresa: nazan@dent.ege.edu.tr

Sažetak

(ne postoji na srpskom)
Objectives: The aim of the study was to evaluate the effect of calcium hydroxide on the adhesion of a resin system to dentin by scanning electron microscopy (SEM). Methods: Cavities were prepared on the mesial and distal sides of 10 extracted lower human molars. The mesial cavities were coated with Prime & Bond 2.1 (Caulk, Dentsply) after total etching, and were restored with TPH composite resin (Caulk, Dentsply). The distal cavities were restored with calcium hydroxide (Dycal, Caulk), Prime & Bond 2.1 and TPH Hibrid composite resin, respectively. The teeth were then sectioned and analyzed by SEM. Results: Prime & Bond 2.1 adhered closely to dentin, forming a gap free attachment with a hybrid layer in most of the specimens. However, in the cavities lined with calcium hydroxide, the polymerization shrinkage of the resin composite caused the separation of the calcium hydroxide from the dentinal surface, forming 15 to 30 μm wide interfacial gaps. Conclusion: The interposition of a layer of calcium hydroxide between dentin and adhesive could reduce the dentinal surface available for adhesion of the restoration and disrupt the continuous adhesion of the bonding agent to dentin.

Ključne reči

Reference

Akester, J. (1979) Dycal disappearing. Br Dent J, 147:369- 375
Akimoto, N., Momoi, Y., Kohno, A., Suzuki, S., Otsuki, M., Suzuki, S., Cox, C.F. (1998) Biocompatibility of Clearfil Liner Bond 2 and Clearfil AP-X system on nonexposed and exposed primate teeth. Quintessence Int, 29(3): 177-88
Brannstrom, M., Mattsson, B., Torstenson, B. (1991) Materials techniques for lining composite resin restorations: A critical approach. J Dent, 19(2): 71-9
Brannstrom, M. (1980) Dentine and pulp in restorative dentistry. London, itd: Wolfe Medical Publications
Cox, C.F., Hafez, A.A., Akimoto, N., Otsuki, M., Suzuki, S., Tarim, B. (1998) Biocompatibility of primer, adhesive and resin composite systems on non-exposed and exposed pulps of non-human primate teeth. Am J Dent, 11 Spec No: S55-63
Ferrari, M., Cagidiaco, C.M., Mason, P.N. (1994) Morphologic aspects of the resin-dentin interdiffusion zone with five different dentin adhesive systems tested in vivo. J Prosthet Dent, 71(4): 404-8
Fusayama, T. (1993) A simple pain-free adhesive restorative system by minimal reduction and total etching. Tokyo: Ishiyaku Euro America, str. 65-85
Goracci, G., Mori, G. (1996) Scanning electron microscopic evaluation of resin-dentin and calcium hydroxide-dentin interface with resin composite restorations. Quintessence Int, 27(2): 129-35
Lefkowitz, W., Seeling, A., Zachinsky, L. (1949) Pulp response to self curing acrylic filling material. NY Dent J, 15, str. 373-386
McConnell, R.J., Boksman, L., Hunter, J.K., Gratton, D.R. (1986) The effect of restorative materials on the adaptation of two bases and a dentin bonding agent to internal cavity walls. Quintessence Int, 17(11): 703-10
Nakabayashi, N., Nakamura, M., Yasuda, N. (1991) Hybrid layer as a dentin-bonding mechanism. J Esthet Dent, 3(4): 133-8
Nakabayashi, N., Saimi, Y. (1996) Bonding to intact dentin. J Dent Res, 75(9): 1706-15
Otsuki, M., Tagami, J., Kanca, J. (1997) Histologic evaluation of two Bisco adhesive systems on exposed pulps. J Dent Res, 76:520 (IADR Abstract)
Pameijer, C.H., Stanley, H.R. (1998) The disastrous effects of the 'total etch' technique in vital pulp capping in primates. Am J Dent, 11 Spec No: S45-54
Pashley, D.H., Sano, H., Yoshimaya, M., i dr. (1996) The effects of dentin bonding procedures on the dentin/pulp complex. u: Shimino M., Maeda T., Suda H., i dr. (ur.) Dentin/pulp complex, Tokyo: Quintessence, pp 193-201
Pashley, D.H. (1992) The effects of acid etching on the pulpodentin complex. Oper Dent, 17(6): 229-42
Reinhardt, J.W., Chalkley, Y. (1983) Softening effects of bases on composite resins. Clin Prev Dent, 5(2): 9-12
Stanley, H.R., Pameijer, C.H. (1997) Dentistry's friend: Calcium hydroxide. Oper Dent, 22(1): 1-3
Stanley, H.R., Pameijer, C.H. (1985) Pulp capping with a new visible-light-curing calcium hydroxide composition (Prisma VLC Dycal). Oper Dent, 10(4): 156-63
Tarim, B., Hafez, A.A., Suzuki, S.H., Suzuki, S., Cox, C.F. (1998) Biocompatibility of Optibond and XR-Bond adhesive systems in nonhuman primate teeth. Int J Periodontics Restorative Dent, 18(1): 86-99
Watanabe, I., Nakabayashi, N. (1993) Bonding durability of photocured phenyl-P in TEGDMA to smear layer-retained bovine dentin. Quintessence Int, 24(5): 335-42