title: New generation of color bonding: a comparative in vitro study.
abstract: BACKGROUND
  Newer available composite resin adhesives have chromatic agents that change their color during setting from pink to colorless. It has an advantage of easy flash removal thus reducing the amount of plaque accumulation and helping patients to maintain better hygiene.
  
  
  OBJECTIVE
  The aim of the present study was to compare shear bond strengths of light-cure orthodontic bonding agents, namely glass ionomer (FujiOrthoLC, GC Orthodontics), conventional composite resin (Transbond XT, 3M Unitek), and color-changing composite resin (Transbond Plus, 3M Unitek) with conventional etch and self-etch primer (Transbond PlusSEP, 3M Unitek).
  
  
  METHODS
  Maxillary premolars (n=300) were bonded on the facial surface in five groups. The INSTRON machine was used for shear bond strength testing.
  
  
  METHODS
  Comparison of the mean rank among the groups was done by Kruskal-Wallis one-way analysis of variance (ANOVA). To determine the mean difference among groups, the Mann-Whitney test with Bon Ferroni adjustment was applied.
  
  
  METHODS
  It was observed that light-cure conventional composite resin with the conventional etchant group had the highest and glass ionomer resin adhesive had the lowest shear bond strength. There was no statistically significant difference between conventional composite used with conventional etchant and color-changing composite resin used with conventional etchant or with self-etch primer.
  
  
  CONCLUSIONS
  Considering the advantages of a color-changing composite and self-etch primer especially in patients having high DMFT scores or physically and mentally compromised patients unable to maintain their hygiene properly, it was concluded in the present study that it would be the most suitable material for direct bonding.
authors.affiliation: Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, New Delhi, India. priyankraibraces@hotmail.com
authors.forename: Rajkumar
authors.initials: R
authors.lastname: Maurya
authors.forename: Tulika
authors.initials: T
authors.lastname: Tripathi
authors.forename: Priyank
authors.initials: P
authors.lastname: Rai
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D001641:Bicuspid; D003116:Color; D004396:Coloring Agents / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; D004396:Coloring Agents; D003188:Composite Resins; D003722:Dental Alloys; D003738:Dental Cements; C095451:Fuji Ortho LC; D005899:Glass Ionomer Cements; D019279:Resin Cements; C429625:Transbond Plus Self-Etching Primer; C477790:Transbond XT; D013193:Stainless Steel