title: Clinical comparison of postoperative sensitivity for an adhesive resin cement containing 4-META and a conventional glass-lonomer cement.
abstract: OBJECTIVE
  The aim of this clinical 2-year follow-up study was to compare the postoperative sensitivity of abutment teeth restored with full coverage restorations retained with either conventional glass-ionomer cement or a new adhesive resin cement containing 4-methacrylolyloxyethyl trimellitate anhydride (4-META).
  
  
  METHODS
  Sixty patients received 120 full-coverage restorations on vital abutment teeth, cemented with either a glass-ionomer cement (Ketac-Cem) or a new adhesive resin cement (Chemiace II). A randomized split-mouth design and a patient double-blind data acquisition protocol were used. The teeth were examined before cementation, after 1 week, and after 6, 12, and 24 months.
  
  
  RESULTS
  With regard to postcementation sensitivity, a low incidence was observed for both groups. With the adhesive resin cement, little postoperative hypersensitivity was observed after 1 week (13.3%), 6 months (5.9%), 12 months (2.1%), and 24 months (none); results were similar with the conventional glass-ionomer cement Ketac-Cem after 1 week (5.9%), 6 months (5.9%), 12 months (6.4%), and 24 months (none). After 6 months, 2 teeth of the Chemiace II group showed no sensitivity. Endodontic treatment was carried out for these 2 abutment teeth. After 24 months, no cases of postoperative hypersensitivity were recorded for either group.
  
  
  CONCLUSIONS
  In this study, the incidence of postoperative hypersensitivity after cementation of full-crown restorations with a conventional glass-ionomer cement and a new adhesive resin cement was similar.
authors.affiliation: Department of Prosthodontics, University Hospital, Freiburg, Germany. nana.denner@uniklinik-freiburg.de
authors.forename: Nana
authors.initials: N
authors.lastname: Denner
authors.forename: Guido
authors.initials: G
authors.lastname: Heydecke
authors.forename: Thomas
authors.initials: T
authors.lastname: Gerds
authors.forename: Jörg R
authors.initials: JR
authors.lastname: Strub
mesh_terms: D000180:Acrylic Resins / Q000009:adverse effects; D000328:Adult; D000368:Aged; D016010:Binomial Distribution; D003807:Dentin Sensitivity / Q000139:chemically induced*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D016014:Linear Models; D008277:Magnesium Oxide / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011076:Polycarboxylate Cement / Q000009:adverse effects*; D011183:Postoperative Complications / Q000139:chemically induced*; D019279:Resin Cements / Q000009:adverse effects*; D015034:Zinc Oxide / Q000009:adverse effects*
chemical_list: D000180:Acrylic Resins; D011076:Polycarboxylate Cement; D019279:Resin Cements; D008277:Magnesium Oxide; C031172:4-META resin; C040235:Ketac-cem; D015034:Zinc Oxide