title: Wear of dental sealing materials using the replication technique.
abstract: OBJECTIVE
  The aim of the present study was an in vivo evaluation of the wear of different sealing materials using the replication technique.
  
  
  METHODS
  Four different sealing materials were randomly applied on 2 out of 4 caries-free permanent first molars of each patient. Impressions were taken at T0: before the sealing material was applied; T1: right after the application; T2: 6 months after the application, and T3: 1 year after the application. The impressions were then processed for scanning electron microscopy analysis of the wear of the examined materials. Statistical analysis was used to evaluate differences among and within the 4 groups.
  
  
  RESULTS
  At T2, the average ratio of residual material in all the groups was 62.37% ± 1.21%, while at T3 it was 49.63% ± 1.11%. At both T2 and T3 there were no statistically significant differences among the 4 groups examined (p=0.76 and p=0.50 respectively). Comparison within the same group at T2 and T3 showed that statistically significant differences were only detected in group D (p=0.015).
  
  
  CONCLUSIONS
  Sealing materials do not undergo a complete loss after 1 year of application, thus indicating that they are suitable for caries prevention.
authors.affiliation: Department of Paediatric Dentistry, Dental School, University of Chieti-Pescara, Chieti, Italy. tripodi@unich.it
authors.forename: D
authors.initials: D
authors.lastname: Tripodi
authors.forename: A
authors.initials: A
authors.lastname: Filippakos
authors.forename: A
authors.initials: A
authors.lastname: Piattelli
authors.forename: S
authors.initials: S
authors.lastname: D'Ercole
authors.forename: V
authors.initials: V
authors.lastname: Perrotti
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002327:Cariostatic Agents / Q000737:chemistry; D002648:Child; D003188:Composite Resins / Q000737:chemistry; D003761:Dental Impression Technique; D019554:Dental Restoration Wear / Q000145:classification*; D005260:Female; D005500:Follow-Up Studies; D005898:Glass / Q000737:chemistry; D006801:Humans; D008297:Male; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008963:Molar / Q000648:ultrastructure; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D016628:Replica Techniques; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012969:Sodium Fluoride / Q000737:chemistry; D013499:Surface Properties
chemical_list: D002327:Cariostatic Agents; C500418:Clinpro Sealant; D003188:Composite Resins; C487975:Delton Plus; C474035:Filtek Supreme; D008689:Methacrylates; D010895:Pit and Fissure Sealants; D011109:Polymethacrylic Acids; D012821:Silanes; C020946:triethylene glycol dimethacrylate; C041979:2,2-bis-(4-(2-methacryloxyethoxy)phenyl)propane; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; D012969:Sodium Fluoride