title: Effect of different restorative materials on caries: a retrospective in vivo study.
abstract: OBJECTIVE
  To compare, retrospectively, the influence of different types of restorative materials on caries in vivo.
  
  
  METHODS
  Twenty-three primary teeth restored by a single operator with amalgam and 2 polyacid-modified resin composites, and with a band of tooth structure beyond the floor of the cervical box, were selected for microscopic evaluation. The teeth were sectioned mesiodistally with the aid of a hard tissue microtome, polished, and cleaned. A confocal laser scanning microscope was used to measure caries-related autofluorescence in the tooth tissue adjacent to the restorative material. A band of about 400 Mum along the interface between the restoration and the tooth structure was observed. The extent of the fluorescent regions was recorded in relation to the total interface length. The specimens were then categorized according to the restorative material used: group A: amalgam (Spherodon, Silmet, n = 11); group D: polyacid-modified resin composite (Dyract, Dentsply DeTrey, n = 6); and group C: polyacid-modified composite (Compoglass, Ivoclar Vivadent, n = 6. The data were analyzed using a one-way analysis of variance (ANOVA) model (alpha = .05) and Pearson correlation coefficient.
  
  
  RESULTS
  No significant differences were found between the materials (P >.05).
  
  
  CONCLUSIONS
  Within the limits of this clinical study, the data obtained using a small sample size suggests that the effect of the restorative material in primary molars does not have a predominant influence on secondary or residual caries.
authors.affiliation: Department of Prosthodontics, Hadassah Faculty of Dental Medicine, The Hebrew University, Jerusalem, Israel. daniel@cc.huji.ac.il
authors.forename: Daniel
authors.initials: D
authors.lastname: Ziskind
authors.forename: Eliyahu
authors.initials: E
authors.lastname: Mass
authors.forename: Timothy F
authors.initials: TF
authors.lastname: Watson
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry* / Q000627:therapeutic use; D000704:Analysis of Variance; D002327:Cariostatic Agents / Q000627:therapeutic use*; D002648:Child; D003188:Composite Resins / Q000737:chemistry* / Q000627:therapeutic use; D003723:Dental Amalgam / Q000737:chemistry* / Q000627:therapeutic use; D003731:Dental Caries / Q000188:drug therapy*; D005453:Fluorescence; D005459:Fluorides / Q000627:therapeutic use*; D006801:Humans; D018613:Microscopy, Confocal; D011140:Polyurethanes / Q000737:chemistry* / Q000627:therapeutic use; D012189:Retrospective Studies; D014094:Tooth, Deciduous
chemical_list: D000180:Acrylic Resins; D002327:Cariostatic Agents; C029012:Composite Dental Resin; D003188:Composite Resins; D011140:Polyurethanes; D003723:Dental Amalgam; D005459:Fluorides