title: A comparison of composite post buildups and cast gold post-and-core buildups for the restoration of nonvital teeth after 5 to 10 years.
abstract: OBJECTIVE
  The aim of this study was to compare the cumulative survival rates and the complication rates of established methods of indirect cast posts and cores and direct posts and composite cores over at least 5 years within a retrospective study of patients who received fixed restorations.
  
  
  METHODS
  The patients were questioned according to a protocol and were examined clinically and radiologically. Of the 101 patients who were recruited, 72 came for a follow-up examination.
  
  
  RESULTS
  Forty-one cast posts and cores and 31 composite cores were examined clinically and radiologically after an average observation period of 8.56 (SD 1.45) years. Four teeth were extracted during the observation period, and 2 more were extracted at the time of the examination. This resulted in cumulative survival rates of 90.2% for cast posts and cores and 93.5% for composite cores. There were 28 complications altogether, consisting of 2 (7.1%) root fractures, 8 (28.6%) teeth with increased probing depths, 3 (10.7%) with increased degrees of mobility, 4 (14.3%) with caries, 9 (32.1%) with periapical radiolucency and/or retrograde filling, and 2 (7.1%) with loss of retention. No statistically significant differences between the 2 methods could be found regarding survival and complication rates.
  
  
  CONCLUSIONS
  It can be concluded that over an average observation period of 8.56 years the indirect cast post-and-core buildup and the direct composite post buildup can be considered of similar value.
authors.affiliation: Department of Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Switzerland. jung@zzmk.unizh.ch
authors.forename: Ronald E
authors.initials: RE
authors.lastname: Jung
authors.forename: Oren
authors.initials: O
authors.lastname: Kalkstein
authors.forename: Irena
authors.initials: I
authors.lastname: Sailer
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Roos
authors.forename: Christoph H F
authors.initials: CH
authors.lastname: Hämmerle
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000328:Adult; D000368:Aged; D003188:Composite Resins / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000379:methods*; D004812:Epidemiologic Methods; D005260:Female; D006046:Gold; D006801:Humans; D008297:Male; D008875:Middle Aged; D011140:Polyurethanes / Q000737:chemistry*; D011176:Post and Core Technique / Q000009:adverse effects; D011859:Radiography; D019553:Tooth, Nonvital / Q000000981:diagnostic imaging / Q000628:therapy*
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D011140:Polyurethanes; D006046:Gold