title: Leakage of interim post and cores used during laboratory fabrication of custom posts.
abstract: The aim of this study was to compare coronal microleakage in two conditions. Twenty-eight extracted upper molars were endodontically treated and divided into two groups and controls: group A: prefabricated post and core permanently cemented; and group B: prepared for a post and restored with a temporary post crown cemented with a temporary cement. The teeth were thermocycled, immersed in black India ink for 1 week, and made transparent. Results indicated that the permanently cemented, prefabricated post and core produced the best seal (p < 0.01); leakage was significantly greater with the temporary post crown and was similar to that of a positive control group.
authors.affiliation: School of Dentistry of Santo Amaro, University of Santo Amaro, São Paulo, Brazil.
authors.forename: Marisa Gomes de Amorim
authors.initials: MG
authors.lastname: Demarchi
authors.forename: Elizabeth Francisco Loureiro
authors.initials: EF
authors.lastname: Sato
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D002244:Carbon; D002484:Cementation / Q000379:methods; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry; D003738:Dental Cements / Q000737:chemistry; D003763:Dental Leakage / Q000145:classification*; D017267:Dental Prosthesis Design; D003794:Dental Restoration, Temporary; D005054:Eugenol / Q000737:chemistry; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007754:Laboratories, Dental; D008963:Molar; D011176:Post and Core Technique; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D018915:Root Canal Preparation; D012390:Root Canal Therapy; D013223:Statistics as Topic; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D015034:Zinc Oxide / Q000737:chemistry; D015035:Zinc Oxide-Eugenol Cement / Q000627:therapeutic use; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D003188:Composite Resins; D003738:Dental Cements; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C028433:chinese ink; D005054:Eugenol; C076899:Temp-Bond; D002244:Carbon; D015036:Zinc Phosphate Cement; D003723:Dental Amalgam; D015034:Zinc Oxide