A medicated polycarboxylate cement to prevent complications in composite resin therapy

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Journal of Prosthetic Dentistry; (USA)

DOI:https://doi.org/10.1016/0022-3913(90)90262-B· OSTI ID:7244498

Okamoto, Y; Shintani, H; Yamaki, M ^[1]

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1. Hiroshima Univ., School of Dentistry (Japan)

Preparative treatment is the preferred method to protect the dentin and pulp from complications in composite resin therapy. This study investigated the in vivo effects of the polycarboxylate cement containing zinc fluoride and tannic acid in composite resin restorations. Scanning electron micrographs established that the composite resin failed to contact the axial wall. The gaps varied from 10 to 60 microns. However, this polycarboxylate cement was shown to provide excellent adaptation to dentin when used as a base and its chemical adhesion allowed it to make close contact with the unetched dentin. The newly developed electron probe x-ray microanalyzer revealed that the in vivo penetration of fluoride and zinc occurred through the dentinal tubules. When this polycarboxylate cement was used, the orifices of dentinal tubules were partially occluded, possibly with the smear layer fixed by tannic acid. In addition, by releasing the components, this polycarboxylate cement adds acid resistance to dentin and increases the resistance of dentin collagen to proteolytic enzymes. As such this polycarboxylate cement offers advantages as a base to composite resin therapy.

• OSTI ID: 7244498
• Journal Information: Journal of Prosthetic Dentistry; (USA), Vol. 63:1; ISSN 0022-3913
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
DENTISTRY
RESINS
TEETH
ELECTRON MICROPROBE ANALYSIS
COLLAGEN
DENTIN
FLUORIDES
PEPTIDE HYDROLASES
CHEMICAL ANALYSIS
DIGESTIVE SYSTEM
ENZYMES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROLASES
MEDICINE
MICROANALYSIS
ORAL CAVITY
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PROTEINS
SCLEROPROTEINS
550602* - Medicine- External Radiation in Diagnostics- (1980-)