Effect of blood contamination on shear bond strength of brackets bonded with conventional and self-etching primers

Sfondrini, Maria Francesca; Cacciafesta, Vittorio; Scribante, Andrea; Angelis, Marco De; Klersy, Catherine

doi:10.1016/j.ajodo.2003.09.022

Cited by 45 publications

(49 citation statements)

References 12 publications

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“…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.…”

Section: Discussionsupporting

confidence: 64%

“…The explanation for the reduction in shear bond strength lies in the chemical composition of blood, which interferes in the links between the resin and adhesive, forming a physical barrier that prevents tag formation, leading to a reduction in mechanical retention (SFONDRINI et al, 2004;BRAUCHLI et al, 2010). Moreover, saliva is composed mainly of water (99%), polysaccharides, proteins, and enzymes.…”

Section: Discussionmentioning

confidence: 99%

“…The mechanism of contamination occurs by forming an organic smear layer, covering the porous surface. In addition to the loss of mechanical adherence, the chemical bond between the calcium and phosphate ions has also been related (SFONDRINI et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…However, in the bonding technique using conventional adhesive various steps are required (BRAUCHLI at al., 2010), strict control of enamel surface contamination is necessary. This is a problem that constantly faces buccomaxillofacial surgeons in the bonding orthodontic accessories (HOBSON et al, 2001;SFONDRINI et., 2004), because in these situations, it is necessary to make an incision into tissues favoring bleeding, in addition to constant salivation in this region due to the salivary glands in the floor of the mouth.…”

Section: Discussionmentioning

confidence: 99%

“…Trans-surgical bonding of orthodontic accessories with the purpose of making it possible to align and level partially erupted teeth requires a suitable environment in which to perform the work, as it is difficult to maintain ideal conditions for bonding the accessories (HOBSON et al, 2001;SFONDRINI et., 2004). After contamination by fluids, the tooth surface decontamination process becomes quicker than repeating the whole bonding procedure.…”

Section: Introductionmentioning

confidence: 99%

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

Pithon¹,

Santos²,

Rey³

et al. 2015

Biosci. J.

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ABSTRACT:This study aimed to evaluate the best method for decontaminating tooth enamel contaminated with blood/saliva before bonding orthodontic accessories, since such contamination is commonly present in surgical procedures of extrusion/orthodontics. 195 bovine incisors were used. Initially their vestibular faces received prophylaxis, H3PO4 at 37% and adhesive application. After this, the vestibular faces of all the teeth were contaminated with blood/saliva. The teeth were then randomly divided into 13 groups (n=15), Group C (Control -without contamination and bonded according to manufacturer's recommendations) and 12 experimental groups according to the decontamination method: Group WD-without decontamination, Group DW-washed with distilled water, Group PS-washed with physiologic solution, Group JA-jets of air, Group G-gauze, Group CW-cotton wool, Group DW+JA-distilled water + jets of air, Group DW+G-distilled water + gauze, Group DW+CW-distilled water + cotton wool, Group PS+JA-physiologic solution + jets of air, Group PS+G-physiologic solution + gauze, Group PS+CW-physiologic solution + cotton wool. After bonding the shear bond strength test was performed on all the samples at a speed of 0.5mm/min. Data were analyzed statistically by ANOVA and Tukey's test at 5% significance level. The results demonstrated absence of statistical differences between the Control and Groups DW+JA and PS+JA (P>0.05). The groups that presented the lowest bond strength values were Group WD, in which no decontamination was performed, and Group PS in which specimens were washed with physiologic solution only. The best methods of decontaminating enamel contaminated with blood/saliva were washing with distilled water or physiologic solution followed by drying with jets of air.

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Section: Discussionsupporting

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%