title: Comparison of the retentive properties of a sleeve cast crown/core system with crowns cemented to conventional cast cores.
abstract: The retention of the crown to the core substructure is of great importance for a successful restoration. The aim of this study was to compare the retentive values of the Flexi-Cast post and its sleeve crown/core complex with that of a crown cemented to a conventional cast post. Forty single-rooted teeth divided equally into four groups were used. Flexi-Cast crown and cores were cemented to Flexi-Cast posts in groups 1 through 3. Group 4, the control group, comprised crowns cemented to conventional cast cores. Groups 1 through 4 had retentive values of 126.2, 135.5, 185.0, and 79.3 lb, respectively. Statistically, the increase in retention for all sizes of the Flexi-Cast crown and cores when compared with the control cast post and crown was found to be significant (p less than or equal to 0.0001).
authors.affiliation: Essential Dental Laboratories, South Hackensack, N.J.
authors.forename: B I
authors.initials: BI
authors.lastname: Cohen
authors.forename: A S
authors.initials: AS
authors.lastname: Deutsch
authors.forename: S
authors.initials: S
authors.lastname: Condos
authors.forename: B L
authors.initials: BL
authors.lastname: Musikant
mesh_terms: D002484:Cementation; D002858:Chromium Alloys / Q000737:chemistry; D003442:Crowns; D003722:Dental Alloys / Q000737:chemistry; D003799:Dental Stress Analysis; D003779:Denture Design; D003781:Denture Retention; D006801:Humans; D008422:Materials Testing; D010165:Palladium / Q000737:chemistry; D011176:Post and Core Technique; D012390:Root Canal Therapy; D012834:Silver / Q000737:chemistry; D013314:Stress, Mechanical; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; D012834:Silver; D010165:Palladium; C036884:Rexillium III; D015036:Zinc Phosphate Cement