title: Placement and replacement of restorations in general dental practice in Iceland.
abstract: Ninety-one Icelandic practicing dentists (51% response rate) provided information related to the reasons for placement and replacement of 8,395 restorations and 741 sealants in 5,997 patients. Information included the patient's gender and age, the clinician's gender and experience in years since graduation, the defined criteria for replacement of restorations, the estimated past use of material in five-year increments and the records of 100 consecutively placed restorations. The materials used include composite (52.7%), amalgam (29.2%), glass ionomer (9.5%), resin-modified glass ionomer (7.1%) and other materials (1.4%). Although material selection was independent of the clinician's gender, female patients received more composite and fewer amalgam restorations than their male counterparts. Reasons for placing restorations comprised replacement of failed restorations (47.2%), primary caries (45.3%) and non-carious defects (7.5%). Secondary caries was the main reason for replacement for all types of restorations. Chi square analysis related to the dependence between the reasons for replacement and clinician's experience showed that more experienced clinicians recorded a lower frequency of secondary caries than less experienced ones (p<0.0001), while the diagnoses of discoloration and fracture of restorations increased with the clinicians' experience (p<0.0001).
authors.affiliation: College of Dentistry, University of Florida, Gainesville 32610-0415, USA.
authors.forename: I A
authors.initials: IA
authors.lastname: Mjör
authors.forename: C
authors.initials: C
authors.lastname: Shen
authors.forename: S T
authors.initials: ST
authors.lastname: Eliasson
authors.forename: S
authors.initials: S
authors.lastname: Richter
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D016009:Chi-Square Distribution; D002648:Child; D003188:Composite Resins; D003723:Dental Amalgam; D003731:Dental Caries / Q000453:epidemiology; D003764:Dental Materials; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000706:statistics & numerical data*; D005260:Female; D005792:General Practice, Dental; D005899:Glass Ionomer Cements; D006801:Humans; D007055:Iceland / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D010895:Pit and Fissure Sealants / Q000627:therapeutic use; D012008:Recurrence; D019279:Resin Cements; D019233:Retreatment / Q000706:statistics & numerical data; D012737:Sex Factors; D013997:Time Factors; D014075:Tooth Discoloration / Q000453:epidemiology; D014082:Tooth Fractures / Q000453:epidemiology
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants; D019279:Resin Cements; D003723:Dental Amalgam