Tensile and shear strengths of bonded and rebonded orthodontic attachments

Jassem, H.A.; Retief, D.H.; Jamison, H.C.

doi:10.1016/0002-9416(81)90182-2

Cited by 2 publications

(3 citation statements)

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“…Concise without resin, and Transbond XT vs. Transbond XT without XT Primer, no significant differences were found, which leads to the conclusion that the absence of a bonding agent did not compromise bond strength. These findings are consistent with the work of Jassem et al, 12 Farquhar 9 and Rose et al, 24 but disagree with Menezes 14 , who showed that using a bonding agent creates large tags in the enamel, which despite providing higher shear strength may involve greater risk of cohesive fractures in the enamel during the debonding procedure.…”

Section: Resultssupporting

confidence: 84%

“…21 Furthermore, they protect the tooth surface that was etched but not covered against decalcification by plaque and food debris around the bracket. 16 Some authors, 12,16 however, found no difference in bonding orthodontic attachments to enamel with or without the use of a bonding agent prior to bonding. Despite some advantages, if this step in composite bonding procedure could be avoided, patient chair time would certainly diminish, facilitating the mainte-nance of a dry working field and preventing bond failures by contamination or moisture.…”

Section: Introductionmentioning

confidence: 99%

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Resistência ao cisalhamento da colagem dos compósitos Concise e Transbond XT com e sem agente de união

Neves¹,

Romano

Correr³

2011

Dental Press J. Orthod.

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Objectives: The aim of this study was to evaluate the shear bond strength of brackets and the adhesive remnant index (ARI) of Concise and Transbond XT composites with and without the use of a bonding agent. Methods: The sample consisted of 60 bovine incisors divided into four groups (n=15). All teeth were subjected to prophylaxis with pumice and enamel etching with phosphoric acid at 37%. In Groups 1 and 2 brackets were bonded with Concise composite with and without application of enamel bond resin, respectively. In Groups 3 and 4, Transbond XT was used with and without XT Primer application, respectively. In these latter groups bonding was light cured for 40 seconds. Specimen shear strength testing was performed on an Instron machine at 0.5 mm/min, and ARI was subsequently evaluated. Results: Shear bond strength in Group 4 was statistically higher than in Groups 1 and 2 (p<0.05) but not when compared to Group 3 (p>0.05). There were no statistically significant differences between Groups 1, 2 and 3 (p>0.05). ARI in Group 3 was statistically higher than in Group 2 (p<0.05), but not statistically different from Groups 1 and 4 (p>0.05). There were no statistically significant differences between Groups 1, 2 and 4 (p>0.05). Conclusion: The composites Concise and Transbond XT showed adequate bond strength with or without the use of their respective bonding agents. AbstractKeywords: Shear strength. Dental bonding. Orthodontics.

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Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Resistência ao cisalhamento da colagem dos compósitos Concise e Transbond XT com e sem agente de união

Neves¹,

Romano

Correr³

2011

Dental Press J. Orthod.

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“…Instead, laser ablated dentin probably acquires its bond strength solely from the penetration of resin tags into dentin tubules. Despite the presence of resinous tags in the SEM images [ Figure 3(E,F)], Jassem et al 56 stated that tag formation accounts for only a fraction of the bond strength in normal hybridized dentin.…”

Section: Discussionmentioning

confidence: 99%

Adhesion of a self‐etching system to dental substrate prepared by Er:YAG laser or air abrasion

et al. 2007

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The purpose of this study was to assess the microtensile bond strength of a self-etching adhesive system to enamel and dentin prepared by Er:YAG laser irradiation or air abrasion, as well as to evaluate the adhesive interfaces by scanning electron microscopy (SEM). For microtensile bond strength test, 80 third molars were randomly assigned to five groups: Group I, carbide bur, control (CB); II, air abrasion with standard tip (ST); III, air abrasion with supersonic tip (SP); IV, Er:YAG laser 250 mJ/4 Hz (L250); V, Er:YAG laser 300 mJ/4 Hz (L300). Each group was divided into two subgroups (n = 8) (enamel, E and dentin, D). E and D surfaces were treated with the self-etching system Adper Prompt L-Pop and composite buildups were done with Filtek Z-250. Sticks with a cross-sectional area of 0.8 mm(2) (+/-0.2 mm(2)) were obtained and the bond strength tests were performed. Data were submitted to ANOVA and Tukey's test. For morphological analysis, disks of 30 third molars were restored, sectioned and prepared for SEM. Dentin presented the highest values of adhesion, differing from enamel. Laser and air-abrasion preparations were similar to enamel. Dentin air-abrasion with standard tip group showed higher bond strength results than Er:YAG-laser groups, however, air-abrasion and Er:YAG laser groups were similar to control group. SEM micrographs revealed that, for both enamel and dentin, the air-abrasion and laser preparations presented irregular adhesive interfaces, different from the ones prepared by rotary instrument. It was concluded that cavity preparations accomplished by both Er:YAG laser energies and air abrasion tips did not positively influence the adhesion to enamel and dentin.

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Tensile and shear strengths of bonded and rebonded orthodontic attachments

Cited by 2 publications

References 0 publications

Resistência ao cisalhamento da colagem dos compósitos Concise e Transbond XT com e sem agente de união

Resistência ao cisalhamento da colagem dos compósitos Concise e Transbond XT com e sem agente de união

Adhesion of a self‐etching system to dental substrate prepared by Er:YAG laser or air abrasion

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