title: A comparison of the compressive strength of calcium hydroxide based lining materials.
abstract: This in vitro study investigated the compressive strength of five commercially available calcium hydroxide based lining materials and a resin bonded zinc oxide/eugenol material under varying conditions of temperature and relative humidity and at various ++time intervals after mixing. The results of the study showed that the calcium hydroxide liners could be consistently ranked in order with Dycal most frequently having the highest and either Life or Renew having the lowest compressive strength at all time intervals examined. Under simulated clinical conditions all the materials tested with the exception of Life and Renew had sufficient compressive strength 3 minutes after mixing to withstand the force of amalgam condensation.
authors.affiliation: Division of Restorative Dentistry, School of Dentistry, Queen's University, Belfast, Northern Ireland, UK.
authors.forename: N
authors.initials: N
authors.lastname: Shazad
authors.forename: J G
authors.initials: JG
authors.lastname: Kennedy
mesh_terms: D002126:Calcium Hydroxide / Q000737:chemistry*; D003723:Dental Amalgam; D003736:Dental Cavity Lining; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods; D004338:Drug Combinations; D005054:Eugenol / Q000737:chemistry; D005557:Formaldehyde / Q000737:chemistry; D006813:Humidity; D008422:Materials Testing; D008903:Minerals / Q000737:chemistry; D018709:Statistics, Nonparametric; D013997:Time Factors; D015034:Zinc Oxide / Q000737:chemistry
chemical_list: C098975:Alkaliner; D003764:Dental Materials; D004338:Drug Combinations; D008903:Minerals; C098974:Septocalcine Ultra; D005557:Formaldehyde; D005054:Eugenol; C025702:Dycal; D003723:Dental Amalgam; C003799:N2 Dental Cement; C040408:Life (dental material); C040409:Renew (dental material); D002126:Calcium Hydroxide; D015034:Zinc Oxide