title: [Effect of pulse Nd:YAG laser on the bond strength of self-adhesive resin cement to dentin].
abstract: OBJECTIVE
  To evaluate the bond strength of a self-adhesive resin cement to dentin by pulse Nd:YAG laser.
  
  
  METHODS
  Ten freshly extracted non-carious human premolars were cut into nearly equal halves and prepared to expose the dentin,randomly divided into two groups with 10 in each group:laser group and control group.All teeth were bonded using a self-adhesive resin cement to dentin after the teeth in the laser group were processed with pulse Nd:YAG laser(0.8W,10Hz) for 25s.After 24 hours under 37 degrees centigrade water,the shear bond strengths of specimens were measured.Each fractured specimen was examined under dental microscope. All statistical analysis was performed using SPSS 17.0 software package.Two new specimens were cut and the cement-dentin interfaces were observed under SEM.
  
  
  RESULTS
  The shear bond strength in the control group and laser group was (9.48±1.80)MPa and (11.15±1.71)MPa,respectively,the difference was statistically significant(P<0.05).Most of the fractured adhesive dentin surfaces were adhesive failure modes in the two groups. SEM observation of the cement-dentin interface in the two groups showed good adaptation,but resin tags were not observed.
  
  
  CONCLUSIONS
  Pulse Nd:YAG laser(0.8W,10Hz) can increase the bond strength of self-adhesive resin cement to dentin.
authors: Department of Stomatology, Qingdao University. Qingdao, China. lk2307@163.com
authors: Kun
authors: K
authors: Liu
authors: Jing
authors: J
authors: Deng
authors: Hui-min
authors: HM
authors: Zhang
authors: Li-xia
authors: LX
authors: Yao
mesh_terms: D000269:Adhesives; D001840:Dental Bonding; D003738:Dental Cements; D003804:Dentin; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006801:Humans; D053844:Lasers, Solid-State; D019279:Resin Cements
chemical_list: D000269:Adhesives; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D019279:Resin Cements; C095998:Adhesive cement