2004-16-3-102-106 - Saudi Dental Journal

ISSN (Print) 1013-9052
EISSN 1658-3558

The Saudi Dental Journal,
P.O. Box 52500,
Riyadh 11563,
Kingdom of Saudi Arabia

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Email	saudidj@ksu.edu.sa

The effect of some dentin bonding agents on Dycal lining cement

Alaa El-Araby, Ph.D
Abed Al-Jabab, Ph.D
Department of Restorative Dental Sciences,College of Dentistry, King Saud University, KSA

Dentin primer is applied as a routine procedure prior to bonding to improve the sealing properties of direct polymerizing resins. Some primers contain acetone or alcohol that may affect the properties of calcium hydroxide liner which is placed as a direct or indirect pulp capping. If calcium hydroxide is softened or smeared over the cavity walls, the bonding will be impaired. Therefore, the cement must be removed, the walls must be cleansed and the procedure must be repeated with careful application of dentin primer. The purpose of this study was to determine the wear and compressive strength of a calcium hydroxide liner (Dycal) after exposure to different kinds of dentin primers for different periods of time. Dycal was mixed according to the manufacturer's instructions and placed in plastic rings of 0.5 mm x 5 mm and allowed to set at 37°C for 15 minutes under 500 gm load. To determine erosion, the height for each sample before and after application of primers was recorded using Digital Height Measuring Instrument (Digmar 817). Compressive strength specimens were also prepared. Dycal treated with Optibond or Syntac for 1 minute or 5 minutes had the highest erosion values and the lowest compressive strength values. Gluma CPs (water based primer) had the least effect on Dycal.

Saudi Dental Journal 2004;16(3):102-106.