title: [Influence of different resin bond systems on coronal microleakage of fiber posts and core restorations].
abstract: OBJECTIVE
  To evaluate the coronal microleakage of teeth restored with fiber posts and composite cores with four different resin bonding systems.
  
  
  METHODS
  Sixty extracted human maxillary single-rooted teeth were endodontically treated and randomly divided into four groups. Post spaces were prepared in the root canals. Four different resin bonding systems (RelyX Unicem, Dulink, DC core Automix, Luxacore) were used respectively to bond fiber posts and reconstruct cores. The specimens were immersed in India ink for one week. Subsequently all teeth were demineralized, dehydrated and rendered transparent. Then microleakage was observed with stereomicroscope.
  
  
  RESULTS
  The microleakage degrees among four resin bonding systems were significantly different (P = 0.007), and group C showed the least microleakage compared with the other three.
  
  
  CONCLUSIONS
  Self-etching resin bonding systems have a super margin sealing ability.
authors.affiliation: Dept. of Prosthodontics, The Affiliated Stomatology Hospital of Medical School, Nanjing University, Nanjing 210008, China.
authors.forename: Yaqin
authors.initials: Y
authors.lastname: Chen
authors.forename: Feng
authors.initials: F
authors.lastname: Zhou
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Luo
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Meng
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D003763:Dental Leakage; D017220:Dentin-Bonding Agents; D006801:Humans; D011176:Post and Core Technique; D019279:Resin Cements
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C483522:LuxaCore; D019279:Resin Cements