title: Microleakage of a self-adhesive class V composite on primary and permanent dentitions.
abstract: OBJECTIVE
  This study aimed to evaluate the microleakage of Class V restorations filled with a 7th-generation self-adhesive composite.
  
  
  METHODS
  In 40 permanent premolars and 80 primary canines, 160 Class V cavities were prepared, which were filled with four restorative materials (n of each material=20 permanent and 20 primary restorations): control: nonbonded composite (Heliomolar), GI: glass ionomer (Fuji IX GP), BC: bonded Heliomolar, SC: self-adhesive composite (Embrace WetBond). Dye penetration was scored 0 to 4 at 160 coronal and 160 gingival margins under 40× magnification by two examiners. The data were analyzed with Mann-Whitney U test (α=0.01).
  
  
  RESULTS
  The mean microleakages of the materials (in the order of 'control, GI, BC, SC') at each margin-dentition (n=20 margins) were: coronal-permanent (3.25±0.72, 2.75±0.72, 0.35±0.59, 2.7±0.73), coronal-primary (3.3±0.66, 2.85±0.88, 0.55±0.76, 2.65±1.14), gingival-permanent (3.35±0.67, 0.85±0.67, 2.95±0.83, 1.55±1.23), and gingival-primary (3.25±0.72, 0.85±0.59, 2.85±0.89, 2.85±0.93). Compared with the control microleakage at each margin-dentition (each group's n=20 margins), BC microleakage was significantly lesser at coronal margins only (p=0.000), GI microleakage was lower at gingival margins only (p=0.000), and SC microleakage was smaller at gingival margins of permanent teeth only (p=0.000). After combining coronal/gingival margins, only SC microleakage in primary dentition (n=40 margins) was not significantly lesser than the control in primary teeth (p=0.018); and microleakage of all other material-dentitions were lesser than corresponding control-dentitions (p=0.000). Permanent and primary teeth had similar results for all material-margins (p>0.5) except for SC at gingival margins (p=0.001).
  
  
  CONCLUSIONS
  SC should be used only at gingival margins of permanent teeth.
  
  
  CONCLUSIONS
  Application of self-adhesive composite should be limited to gingival margins of permanent teeth.
authors.affiliation: Professor, Department of Dentistry, Kerman University of Medical Sciences, Kerman, Iran, e-mail: swt_f@yahoo.com.
authors.forename: Leila
authors.initials: L
authors.lastname: Shafiei
authors.forename: Parinaz
authors.initials: P
authors.lastname: Mojiri
authors.forename: Yalda
authors.initials: Y
authors.lastname: Ghahraman
authors.forename: Vahid
authors.initials: V
authors.lastname: Rakhshan
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D001641:Bicuspid / Q000648:ultrastructure; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry*; D003481:Cuspid / Q000648:ultrastructure; D001840:Dental Bonding / Q000379:methods; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification*; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000145:classification*; D003804:Dentin / Q000648:ultrastructure; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D010895:Pit and Fissure Sealants / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D012394:Rosaniline Dyes; D013696:Temperature; D013997:Time Factors; D014094:Tooth, Deciduous / Q000648:ultrastructure*
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D003188:Composite Resins; D003764:Dental Materials; C586521:Embrace WetBond; C420130:Excite cement; C439808:Fuji IX GP Fast; D005899:Glass Ionomer Cements; C513708:Heliomolar; D008689:Methacrylates; D010756:Phosphoric Acids; D010895:Pit and Fissure Sealants; D011140:Polyurethanes; D012394:Rosaniline Dyes; C030242:phosphoric acid