Investigation of Shear-Peel Bond Strength of Orthodontic Brackets on Enamel after Using Pro Seal™

High bond strengths are required in order to avoid bracket failure during treatment while brackets should be removable. In addition, chair time should be kept at a minimum. Therefore, the aim of this study was to investigate any differences in bracket's bond strength to enamel by reducing the polymerization time and the steps of bonding procedure. Five hundred teeth were randomly allocated into 20 groups. The groups were established considering the investigated curing units (quartz-tungsten-halogen (QTH) and light-emitting diode (LED), each with two different polymerization times) and the used bonding agents (Clearfil SE Bond, Transbond Plus, Ideal1, iBond, and Transbond XT Primer following acid etching). The brackets were debonded using a shear-peel load and used to calculate the bond strength. The location of adhesive failure was registered by using the modified adhesive remnant index (ARI). The influence of the parameters curing unit, curing time, and bonding agent as well as their interaction products on bond strength showed that the bonding agent influenced the bond strength most followed by curing time. The parameter curing unit as well as all the generated interaction products of it showed a lower impact. Regarding the ARI, the bonding agent exhibited also the highest influence. Using a LED resulted in comparable bond strengths as the QTH curing device also at shorter exposure times. Additionally, the two-component self-etching primers showed similar bond strengths compared to the acid-etching method. Chair time can be reduced by using two-component self-etching primers and LED without decrease of bond strength.

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“…This is in agreement with recently published studies were iBond [31,34] or Ideal1 [20,32,35,36] were investigated.…”

Section: Discussionsupporting

confidence: 92%

“…In this study, Clearfil SE Bond and Transbond Plus achieved similar high bond strength to that of the etch and prime method. These results have also been found in other studies [32,33].…”

Section: Discussionsupporting

confidence: 89%

Does a reduction of polymerization time and bonding steps affect the bond strength of brackets?

et al. 2011

Self Cite

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“…In the unbleached groups, the majority of the bond failure in both groups left more than 90% of the adhesive on the enamel surfaces. This finding is in agreement with Paschos et al 22 In the bleached groups, the mode of bond failure was adhesive/cohesive in nature. Indeed, this mostly mixed adhesive/cohesive failure mode was also found in other studies that stored their samples 2 weeks after bleaching, prior to bonding.…”

Section: Discussionsupporting

confidence: 93%

“…16,12 Bishara et al 16 showed in their in vitro study that Pro Seal sealant did not reduce immediate shear bond strength when compared to Transbond XT primer. Similarly, Paschos et al 22 found no statistically significant difference between Pro Seal sealant and Transbond XT primer when used with adhesive precoated brackets.…”

Section: Discussionmentioning

confidence: 92%

Effect of tooth bleaching on shear bond strength of a fluoride-releasing sealant

Phan¹,

Akyalçın

Wiltshire

et al. 2012

The Angle Orthodontist

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Objective: To evaluate the effect of an in-office plus at-home bleaching protocol on shear bond strength of orthodontic buttons when using a fluoride-releasing sealant. Materials and Methods: Extracted human molars (160) were randomly divided into bleached (n 5 80) and unbleached groups (n 5 80). The bleached group was treated with 45% carbamide peroxide for 30 minutes, followed by five applications of 20% carbamide peroxide at 24-hour intervals. After 2 weeks, lingual buttons were bonded on the teeth in both groups using either Transbond XT primer or Pro Seal sealant. The teeth were then stored in artificial saliva and subjected to shear testing at 24 hours and 3 months using a Zwick Universal Test Machine. Comparisons of mean shear bond strength values were made with the analysis of variance test. The Fisher's exact test was used to evaluate the adhesive remnant index scores. Results: The analysis of variance of the 24-hour results indicated a significant difference between the four subgroups (P , .0011). Further simple t-tests indicated that the differences were significant only between bleached and unbleached subgroups (P , .0011). The 3-month results showed the mean shear bond strengths of the unbleached group using Pro Seal sealant was significantly lower than that of the other, though still greater than clinically minimal suggested bond strengths. Interestingly, 15% of the bleached teeth exhibited enamel fracture at the 3-month testing. Conclusion: Both Pro Seal sealant and Transbond XT primer demonstrated reliable shear bond strength values on both bleached and unbleached teeth over time. (Angle Orthod. 2012;82:546-551.)

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“…Microscopy reveals that only 55.6 µm of enamel are lost in the process. The trend is toward self-etching products, which simplify the procedure in clinicians' hands by combining several bonding steps [26,27]. Self-etching primers are desirable, not least because more enamel is preserved.…”

Section: Bearbeiten Der Gesamten Labialflächementioning

confidence: 99%

Efficacy of a Sealant

Heinig¹,

Hartmann²

2008

J Orofac Orthop

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Investigation of Shear-Peel Bond Strength of Orthodontic Brackets on Enamel after Using Pro Seal™

Cited by 22 publications

References 48 publications

Does a reduction of polymerization time and bonding steps affect the bond strength of brackets?

Does a reduction of polymerization time and bonding steps affect the bond strength of brackets?

Effect of tooth bleaching on shear bond strength of a fluoride-releasing sealant

Efficacy of a Sealant

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