Effect of blood contamination on shear bond strength of orthodontic brackets and disinclusion buttons

Evaluation of decontamination methods of blood/saliva in the bonding of orthodontic accessories

“…In the present study, when the tooth surfaces were contaminated, and no decontamination was performed the bond strength values fell significantly when compared with the Control Group that presented a mean of 4.78 MPa. This bond strength value is lower than the clinically accepted one, which is in agreement with previous investigations (OONSOMBAT et al, 2003;CACCIAFESTA et al, 2004b;SFONDRINI et al, 2004;SFONDRINI et al, 2010). This demonstrates the need for decontaminating the enamel surface before bonding when the material of choice is Transbond XT, since this material has no affinity for humidity.…”

“…The orthodontic accessories used were the orthodontic button, which is the item most required by orthodontists as it is less voluminous when compared with brackets, with less friction than a bracket, thus diminishing inflammatory reactions at the surgical access site (SFONDRINI et al, 2010). In the present study, when the tooth surfaces were contaminated, and no decontamination was performed the bond strength values fell significantly when compared with the Control Group that presented a mean of 4.78 MPa.…”

“…In treatments that require and involves surgical-orthodontic procedures (YANG, 1973;FERREIRA-JUNIOR et al, 2009) the direct bonding of orthodontic screens, buttons and brackets for traction of impacted teeth has become the preferred technique SFONDRINI et al, 2010). However, in the bonding technique using conventional adhesive various steps are required (BRAUCHLI at al., 2010), strict control of enamel surface contamination is necessary.…”

“…To perform this evaluation bovine teeth were used, because previous studies have shown that human and bovine enamel are similar in their physical properties, composition and bond strength, and are reliable for use in bond studies (CACCIAFESTA et al, 2004ab;OZTOPRAK et al, 2007;SFONDRINI et al, 2010).…”

Effect of Different Methods for Decontaminating Tooth Enamel After Contact With Blood Before Bonding Orthodontic Buttons

“…This bond strength value is lower than the clinically accepted value, which is in agreement with previous investigations. 3,11,12,16,17 In a study on dry surfaces, a bond strength of 26.5 MPa was found, differing from the findings of Özto- P ϭ .544 vs group 9 P ϭ .020 vs group 10 P ϭ .124 vs group 10 P ϭ .048 vs group 11 P ϭ .096 vs group 11 P ϭ .997 vs group 12 P ϭ .632 vs group 12 prak et al 9 (15.28), who used the same adhesive material. In contrast, in the groups in which the enamel was contaminated with blood, the results were close to the value of 3.75 MPa obtained in our study (3.08).…”