Effects of three adhesion boosters on the shear bond strength of new and rebonded brackets--an in vitro study.
OBJECTIVE
To evaluate the effects of three adhesion boosters--All-Bond 2, Enhance LC, and Ortho Solo--on the shear bond strength of new and rebonded (previously debonded) brackets.


METHODS
One hundred new and 100 sandblasted debonded brackets were bonded to 200 extracted human premolars and divided into eight groups.


RESULTS
The new brackets/Ortho Solo group yielded the highest bond strength, followed by the new brackets/All-Bond 2 and the new brackets/Enhance LC groups. During rebonding, Ortho Solo improved the bond strength significantly; however, All-Bond 2 and Enhance LC did not.


CONCLUSIONS
(1) Bond strength is significantly improved when new brackets are bonded with an adhesion booster; (2) without any adhesion booster, sandblasted rebonded brackets yield a significantly lower bond strength than new brackets; (3) Enhance LC failed to improve the bond strength of rebonded brackets; (4) Ortho Solo increased the bond strength of rebonded brackets significantly; and (5) brackets rebonded with Ortho Solo yielded comparable bond strength as new brackets without any adhesion booster.
Vijayakumar
Anitha
A
Department of Orthodontics, Ragas Dental College and Hospital, Uthandi, Chennai, India. aneethaa11@gmail.com
Venkateswaran
Sundaram
S
Krishnaswamy
N Rengarajan
NR
D000134:Acid Etching, Dental / Q000379:methods; D000537:Aluminum Oxide / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D017005:Dental Debonding / Q000379:methods; D003743:Dental Enamel / Q000648:ultrastructure; D045662:Dental Etching / Q000379:methods; D003799:Dental Stress Analysis / Q000295:instrumentation; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D016910:Orthodontic Brackets; D010756:Phosphoric Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D003738:Dental Cements; D017220:Dentin-Bonding Agents; C414342:Enhance LC; D008689:Methacrylates; C508972:OrthoSolo; D010756:Phosphoric Acids; D019279:Resin Cements; D014867:Water; C100742:All-Bond 2; C030242:phosphoric acid; D000537:Aluminum Oxide