title: [Effect of silicon coating on bonding strength of ceramics and titanium].
abstract: OBJECTIVE
  This study investigated the effect of silicon coating (SiO2) by solution-gelatin (Sol-Gel) technology on bonding strength of titanium and ceramics.
  
  
  METHODS
  Sixteen pure titanium specimens with the size of 25 mm x 3 mm x 0.5 mm were divided into two groups (n=8), test group was silicon coated by Sol-Gel technology, the other one was control group. The middle area of the samples were veneered with Vita Titankeramik system, the phase composition of two specimens were characterized by X-ray diffraction (XRD). The bonding strength of titanium/porcelain was evaluated using three-point bending test. The interface of titanium and porcelain and fractured titanium surface were investigated by scanning electron microscope (SEM) with energy depressive spectrum (EDS).
  
  
  RESULTS
  Contents of surface silicon increased after modification with silicon coated by Sol-Gel technology. The mean bonding strength of test group and control group were (37.768 +/- 0.777) MPa and (29.483 +/- 1.007) MPa. There was a statistically significant difference (P=0.000) between them. The bonded ceramic boundary of test group was wider than control group.
  
  
  CONCLUSIONS
  Silicon coating by Sol-Gel technology was significant in improving bonding strength of titanium/Vita Titankeramik system.
authors.affiliation: Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China.
authors.forename: Shu
authors.initials: S
authors.lastname: Zhou
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Fei-Min
authors.initials: FM
authors.lastname: Zhang
authors.forename: Han-Bing
authors.initials: HB
authors.lastname: Guang
mesh_terms: D002516:Ceramics; D001840:Dental Bonding; D003776:Dental Porcelain; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012825:Silicon; D012822:Silicon Dioxide; D013499:Surface Properties; D014025:Titanium
chemical_list: D003776:Dental Porcelain; D012822:Silicon Dioxide; D014025:Titanium; D012825:Silicon