title: [Experimental investigation of shear bond strength on orthodontic bonding on dental fluorosis after air abrading surface preparation technique].
abstract: OBJECTIVE
  To find a way to having higher bond strength on mottled enamel.
  
  
  METHODS
  Sixty mottled enamel first bicuspid teeth extracted from fifteen patients needing orthodontic force were prepared and divided into four groups. Group A was routine acid etched, group B was air abraded, group C was etched by clearfil liner self-etching primer, group D was air abraded and then etched by clearfil liner self-etching primer. Next the bond and resin were used. The shear bond strength was observed and compared. The data were analysed by SPSS 11.5 statistical package.
  
  
  RESULTS
  The shear bonding strength of group A was (2.247 +/- 0.261) MPa, group B was (5.374 +/- 0.469) MPa, group C was (4.345 +/- 0.401) MPa, group D was (5.791 +/- 0.636) MPa. The strengths of four groups were significantly different (P < 0.01). The adhesive remnant index (ARI) scores of the four groups had no significant difference.
  
  
  CONCLUSIONS
  In clinic, using air abrasion surface preparation technique is an acceptable way to enhancing the shear bond strength before sticking the orthodontic bonding on dental fluorosis.
authors.affiliation: Dept. of Stomatology, China Civil Aviation General Hospital, Beijing 100025, China.
authors.forename: Wen-Peng
authors.initials: WP
authors.lastname: Du
authors.forename: Chun-Wang
authors.initials: CW
authors.lastname: Xing
authors.forename: Yu
authors.initials: Y
authors.lastname: Han
authors.forename: Rong
authors.initials: R
authors.lastname: Qi
authors.forename: Jia-Qi
authors.initials: JQ
authors.lastname: Xu
authors.forename: Hua-Ling
authors.initials: HL
authors.lastname: Ji
mesh_terms: D000134:Acid Etching, Dental; D001840:Dental Bonding; D003799:Dental Stress Analysis; D009050:Fluorosis, Dental; D006801:Humans; D016910:Orthodontic Brackets; D019279:Resin Cements; D033081:Shear Strength
chemical_list: D019279:Resin Cements