title: A 3-year postoperative clinical evaluation of posts and cores beneath existing crowns.
abstract: Fabrication of posts and cores for fixed partial denture (FPD) and removable partial denture (RPD) abutment restorations is common in dentistry. The biocompatibility of various post and core techniques with the restorations was clinically evaluated according to location and function. In this study, 154 post and core constructions for 150 patients were observed for a 3-year period to determine if the function of the original restorations remained unsatisfactory. The following techniques were included: (1) screw post and light-curing composite resins, (2) cemented post with parallel sides and light-curing composite resins, and (3) a cast and core technique. Seventeen of the 154 restorations failed; four failures were attributed to root fractures, three to radicular caries, and five to crown dislodgement, while five failures were from detachment of the post and core from the root. The statistical analysis revealed that only the factor "type of abutment" (RPDs and FPDs) had some effect on the failure of the restorations.
authors.affiliation: Department of Fixed Prosthesis, University of Thessaloniki, School of Dentistry, Greece.
authors.forename: A H
authors.initials: AH
authors.lastname: Hatzikyriakos
authors.forename: G I
authors.initials: GI
authors.lastname: Reisis
authors.forename: N
authors.initials: N
authors.lastname: Tsingos
mesh_terms: D000180:Acrylic Resins; D003188:Composite Resins; D003442:Crowns; D000044:Dental Abutments; D003779:Denture Design; D003830:Denture, Partial, Fixed; D003832:Denture, Partial, Removable; D005069:Evaluation Studies as Topic; D005260:Female; D006047:Gold Alloys; D006801:Humans; D008297:Male; D010969:Plastics; D011076:Polycarboxylate Cement; D011176:Post and Core Technique; D011475:Prosthesis Failure; D013193:Stainless Steel; D013499:Surface Properties; D013997:Time Factors; D015036:Zinc Phosphate Cement
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; D006047:Gold Alloys; D010969:Plastics; D011076:Polycarboxylate Cement; D013193:Stainless Steel; D015036:Zinc Phosphate Cement