title: Marginal adaptation in dentin of a self-adhesive universal resin cement compared with well-tried systems.
abstract: OBJECTIVE
  This study compares the marginal adaptation of a new self-adhesive universal resin cement with only one application step, to the marginal adaptation of established cements and their corresponding adhesive systems.
  
  
  METHODS
  All-ceramic crowns were inserted on human molars using a new self-adhesive universal resin cement without and with one pre-treatment step, a resin cement with a smear-layer removing and a compomer cement with a smear-layer dissolving adhesive system. After simulation of five years oral stress, the marginal adaptation was evaluated by dye penetration and scanning electronic microscope analysis using the replica technique.
  
  
  RESULTS
  Scanning electron microscopy: all investigated luting agents showed comparable amounts of 'perfect margin' ranging between 88-98% (median). Dye penetration: the self-adhesive system had significantly lower dye penetration (18-25%, median).
  
  
  CONCLUSIONS
  The results indicate that a self-adhesive universal resin cement without pre-treatment can provide a marginal adaptation at dentin which is comparable to established luting agents.
authors.affiliation: Department of Prosthodontics, University of Regensburg, Franz-Josef-Strayss-Allee 11, 93053 Regensburg, Germany. michael.behr@klinik.uni-regensburg.de
authors.forename: M
authors.initials: M
authors.lastname: Behr
authors.forename: M
authors.initials: M
authors.lastname: Rosentritt
authors.forename: T
authors.initials: T
authors.lastname: Regnet
authors.forename: R
authors.initials: R
authors.lastname: Lang
authors.forename: G
authors.initials: G
authors.lastname: Handel
mesh_terms: D004396:Coloring Agents; D020770:Compomers; D003442:Crowns; D001840:Dental Bonding; D003763:Dental Leakage / Q000175:diagnosis; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008963:Molar; D016628:Replica Techniques; D019279:Resin Cements; D016369:Smear Layer
chemical_list: D004396:Coloring Agents; D020770:Compomers; D017220:Dentin-Bonding Agents; C408584:Prompt L-Pop; C483701:Rely X Unicem; D019279:Resin Cements; C078484:Syntac dentine adhesive; C400935:dyract-cem; D003776:Dental Porcelain; C103502:Variolink