title: Shear bond strengths of a selenium containing and a conventional light cured adhesive for orthodontic bonding.
abstract: BACKGROUND
  The objectives of this study were to evaluate the debonding strength and mode of failure of a selenium containing adhesive compared to an established orthodontic adhesive.
  
  
  METHODS
  One hundred sixty bovine mandibular incisors were allocated to eight groups: steel and clear brackets were bonded with either selenium containing adhesive (Group 1: SeLect Defense) or a conventional light-cured adhesive (Group 2:Transbond XT) to measure debond strength and the adhesive remnant index was used to assess the location of bond failure. Data was evaluated using a three-way analysis of variance and Fisher's PLSD multiple comparisons test for mean debond strengths.
  
  
  RESULTS
  Group 2 debond strengths were greater than that of Group 1 with the steel and clear brackets. Group 1 debond strengths were greater with clear than with steel brackets at both time points. Both adhesives demonstrated increased debond strengths from zero to 24 hours and the clear brackets exhibited a greater ARI than steel after debonding. Comparisons of debond strength means among adhesives, brackets, and times were all statistically significant.
  
  
  CONCLUSIONS
  All debond strengths were within a clinically acceptable range according to previous literature. SeLect Defense may be desirable due to its potential for preventing white spot lesions despite the reduced strength compared to Transbond XT.
authors.affiliation: Department of Orthodontics, University of Texas School of Dentistry at Houston, Houston, Texas, USA.
authors.forename: Steven L
authors.initials: SL
authors.lastname: Machicek
authors.forename: Kathleen R
authors.initials: KR
authors.lastname: McGrory
authors.forename: Jeryl D
authors.initials: JD
authors.lastname: English
authors.forename: Claude R
authors.initials: CR
authors.lastname: Stephens
authors.forename: Randy K
authors.initials: RK
authors.lastname: Ellis
authors.forename: Clark D
authors.initials: CD
authors.lastname: Colville
authors.forename: John M
authors.initials: JM
authors.lastname: Powers
authors.forename: Joe C
authors.initials: JC
authors.lastname: Ontiveros
authors.forename: Sercan
authors.initials: S
authors.lastname: Akyalcin
mesh_terms: D000268:Adhesiveness; D000537:Aluminum Oxide / Q000737:chemistry; D000818:Animals; D002417:Cattle; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D017005:Dental Debonding; D003743:Dental Enamel / Q000033:anatomy & histology; D003799:Dental Stress Analysis / Q000295:instrumentation; D055115:Light-Curing of Dental Adhesives; D016910:Orthodontic Brackets; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D012643:Selenium / Q000737:chemistry*; D033081:Shear Strength; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors
chemical_list: D003722:Dental Alloys; D003738:Dental Cements; D019279:Resin Cements; C477790:Transbond XT; D013193:Stainless Steel; D012643:Selenium; D000537:Aluminum Oxide