Placement and Replacement of Restorations in General Dental Practice in Iceland.

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 patients' gender and age, clinician's gender and experience and years since graduation, the defined criteria for placement of restorations, the estimated past use of material in five-year increments and the records of 100 consecutively placed restorations. The material used includes 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 placement of failed restorations (47.2%), primary caries (45.3%) and non-caries 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 clinicians experience showed that more experienced clinicians recorded a lower frequency of secondary caries than less experienced ones (p<0.0001), while the diagnosis of discoloration and fracture of restorations increased with the clinicians' experience (p<0.0001). [ABSTRACT FROM AUTHOR]