title: [The combined occluding effect of fluor protector and Nd:YAG laser irradiation on human dentinal tubules].
abstract: OBJECTIVE
  To evaluate the combined occluding effect of fluor protector and Nd:YAG Laser irradiation on human dentinal tubules.
  
  
  METHODS
  Twenty-four dentin specimens with exposed dentinal tubule orifices treated by 37% H3PO4 were randomly divided into four groups. Group B, C and D were vanished by fluor protector, group A served as a control. Group D was lased by Nd:YAG laser. Group C and D were brushed with normal force.
  
  
  RESULTS
  Under SEM, group A showed numerous exposed dentinal tubule orifices, the diameter of which is 2-3 microns. Group B showed closure of dentinal tubule orifices. Group C showed that most of the fluor protector were brushed away and group D showed over 80% of the dentinal tubule orifices were occluded.
  
  
  CONCLUSIONS
  Fluor protector combined with Nd:YAG laser can make most of the dentinal tubule orifices occluded even after brushed.
authors.affiliation: Special Dental Department, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: Q
authors.initials: Q
authors.lastname: Lin
authors.forename: B
authors.initials: B
authors.lastname: Zhao
mesh_terms: D003131:Combined Modality Therapy; D003807:Dentin Sensitivity / Q000628:therapy*; D004338:Drug Combinations; D005460:Fluorides, Topical; D006801:Humans; D053685:Laser Therapy; D011140:Polyurethanes; D012821:Silanes
chemical_list: D004338:Drug Combinations; D005460:Fluorides, Topical; D011140:Polyurethanes; D012821:Silanes; C022599:Fluor Protector