The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
John Laffoon - One of the best experts on this subject based on the ideXlab platform.
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effect of using a new Cyanoacrylate Adhesive on the shear bond strength of orthodontic brackets
Angle Orthodontist, 2009Co-Authors: Samir E. Bishara, John Laffoon, Leigh Vonwald, John J WarrenAbstract:During bonding of orthodontic brackets to enamel, conventional Adhesive systems use three different agents: an enamel conditioner, a primer solution, and an Adhesive resin. A unique characteristic of some new bonding systems is that they need neither a priming agent nor a curing light to bond brackets. Such an approach should be more cost-effective for the clinician and indirectly also for the patient. The purpose of this study was to determine the effects of using a Cyanoacrylate Adhesive on the shear bond strength of orthodontic brackets and on the bracket/Adhesive failure mode. The brackets were bonded to extracted human teeth according to one of two protocols. Group 1: Teeth were etched with 37% phosphoric acid. After applying the primer, the brackets were bonded with Transbond XT (3M Unitek, Monrovia, Calif) and were light-cured for 20 seconds. Group 2: Teeth were etched with 35% phosphoric acid. The brackets were then bonded with Smartbond (Gestenco International, Gothenburg, Sweden). The present in vitro findings indicated that the use of the Cyanoacrylate Adhesive to bond orthodontic brackets to the enamel surface did not result in a significantly different (P 5 .24) shear bond force (mean 5 5.8 6 2.4 MPa) as compared to the control group (mean 5 5.2 6 2.9 MPa). The comparison of the Adhesive Remnant Index scores indicated that there was significantly (P 5 .006) less residual Adhesive remaining on the tooth with the Cyanoacrylate than on the tooth with the conventional Adhesive system. In conclusion, the new Adhesive has the potential to be used to bond orthodontic brackets while reducing the total bonding time. (Angle Orthod 2001;71:466-469.)
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Bonding orthodontic brackets to porcelain using different Adhesives/enamel conditioners: a comparative study.
World journal of orthodontics, 2005Co-Authors: Samir E. Bishara, Charuphan Oonsombat, Raed Ajlouni, John LaffoonAbstract:AIM: To evaluate the use of new Adhesive/primer materials, including an experimental self-etch primer and a cyanocrylate Adhesive, to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces. MATERIAL AND METHODS: Sixty porcelain maxillary central incisor teeth were used. The teeth were randomly divided into four groups: group 1, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite Adhesive; group 2, teeth were microetched, hydrofluoric acid and silane applied, and then the brackets were bonded with a composite Adhesive; group 3, an acid-etch primer was used, then the brackets were bonded with the same composite Adhesive as in the first 2 groups; group 4, teeth were etched with 35% phosphoric acid and the brackets were bonded with the Cyanoacrylate Adhesive. RESULTS: The analysis of variance comparing the groups tested (F = 9.446) indicated that there was a significant difference between the 4 groups. The Cyanoacrylate Adhesive had the lowest shear bond strength (mean = 1.7 +/- 2.1 MPa), followed by the conventional bonding using a 37% phosphoric acid etch and composite (mean = 2.1 +/- 1.2 MPa). The use of Transbond after microetching, with the application of hydrofluoric acid and silane, provided the highest shear bond strength (mean = 5.5 +/- 2.7 MPa). Transbond used with the acid etch-primer had a lower bond strength (mean = 3.8 +/- 2.5 MPa), but was not significantly different from the microetch/hydrofluoric acid/silane group. CONCLUSION: The results indicated that the use of a phosphoric acid etch with either a Cyanoacrylate or composite Adhesive to bond orthodontic brackets to porcelain surfaces produced significantly lower shear bond strength. Self-etch primers produced higher but less consistent shear bond strength for bonding orthodontic brackets. The most reliable bonding procedure to porcelain surfaces is through microetching with the use of hydrofluoric acid and a silane coupler before bonding, but this also produces the greatest damage to the porcelain surface.
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Effect of thermocycling on the shear bond strength of a Cyanoacrylate orthodontic Adhesive
American Journal of Orthodontics and Dentofacial Orthopedics, 2003Co-Authors: Samir E. Bishara, Raed Ajlouni, John LaffoonAbstract:The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a Cyanoacrylate Adhesive system, specifically 24 hours after bonding when the Adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned, polished, and randomly separated into 2 groups: group I, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37°C; and group II, Cyanoacrylate Adhesive debonded after thermocycling at 5°C and 55°C. The results of the t test comparing the 2 groups (t = 6.84) indicated significant differences between them (P = .0001). The Cyanoacrylate Adhesive at 24 hours had significantly greater shear bond strength (x̄ = 7.1 ± 3.3 MPa) than after thermocycling 500 times between 5°C and 55°C (x̄ = 1.5 ± 1.4 MPa). The findings indicated that the Cyanoacrylate Adhesive tested has clinically adequate shear bond strength at 24 hours after initial bonding but loses about 80% of its strength after thermocycling. The clinician should consider all properties of the Adhesive, including no need for a curing light, working time of 5 seconds before the Adhesive starts to set, and the significant decrease in bond strength after thermocycling.
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effect of thermocycling on the shear bond strength of a Cyanoacrylate orthodontic Adhesive
American Journal of Orthodontics and Dentofacial Orthopedics, 2003Co-Authors: Samir E. Bishara, Raed Ajlouni, John LaffoonAbstract:Abstract The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a Cyanoacrylate Adhesive system, specifically 24 hours after bonding when the Adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned, polished, and randomly separated into 2 groups: group I, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37°C; and group II, Cyanoacrylate Adhesive debonded after thermocycling at 5°C and 55°C. The results of the t test comparing the 2 groups (t = 6.84) indicated significant differences between them (P =.0001). The Cyanoacrylate Adhesive at 24 hours had significantly greater shear bond strength (x = 7.1 ± 3.3 MPa) than after thermocycling 500 times between 5°C and 55°C (x = 1.5 ± 1.4 MPa). The findings indicated that the Cyanoacrylate Adhesive tested has clinically adequate shear bond strength at 24 hours after initial bonding but loses about 80% of its strength after thermocycling. The clinician should consider all properties of the Adhesive, including no need for a curing light, working time of 5 seconds before the Adhesive starts to set, and the significant decrease in bond strength after thermocycling. (Am J Orthod Dentofacial Orthop 2003;123:21-4)
Samir E. Bishara - One of the best experts on this subject based on the ideXlab platform.
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Effect of water storage on the shear bond strength of a Cyanoacrylate Adhesive: clinical implications.
World journal of orthodontics, 2020Co-Authors: Raed Ajlouni, Samir E. Bishara, Charuphan OonsombatAbstract:AIM: To compare the effects of water storage on the shear bond strength of a Cyanoacrylate Adhesive system at three time intervals: (1) within 30 minutes after bonding the bracket to the tooth; (2) 24 hours from the time of bonding; and (3) after 30 days of storage in water at 37 degrees C. METHODS: Sixty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleansed and polished, then randomly separated into three groups: group 1, Cyanoacrylate Adhesive debonded within 30 minutes from initial bonding; group 2, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37 degrees C; group 3, Cyanoacrylate Adhesive debonded after 30 days immersion in deionized water at 37 degrees C. RESULTS: Analysis of variance (F = 11.94) comparing the experimental groups indicated the presence of significant differences between the three groups (P = .0001). The shear bond strengths were significantly greater in the two groups debonded after 30 minutes (mean = 5.8+/-2.4 MPa) and 24 hours (mean = 7.1+/-3.3 MPa) than the group debonded after 30 days of water storage (mean = 2.7+/-2.0 MPa). CONCLUSION: The present findings indicate that the Cyanoacrylate Adhesive has clinically adequate shear bond strengths at 30 minutes and 24 hours after initial bonding, but that the bond strength decreases by 50% within 30 days. The clinician needs to carefully take the overall properties of the Adhesive into consideration.
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effect of using a new Cyanoacrylate Adhesive on the shear bond strength of orthodontic brackets
Angle Orthodontist, 2009Co-Authors: Samir E. Bishara, John Laffoon, Leigh Vonwald, John J WarrenAbstract:During bonding of orthodontic brackets to enamel, conventional Adhesive systems use three different agents: an enamel conditioner, a primer solution, and an Adhesive resin. A unique characteristic of some new bonding systems is that they need neither a priming agent nor a curing light to bond brackets. Such an approach should be more cost-effective for the clinician and indirectly also for the patient. The purpose of this study was to determine the effects of using a Cyanoacrylate Adhesive on the shear bond strength of orthodontic brackets and on the bracket/Adhesive failure mode. The brackets were bonded to extracted human teeth according to one of two protocols. Group 1: Teeth were etched with 37% phosphoric acid. After applying the primer, the brackets were bonded with Transbond XT (3M Unitek, Monrovia, Calif) and were light-cured for 20 seconds. Group 2: Teeth were etched with 35% phosphoric acid. The brackets were then bonded with Smartbond (Gestenco International, Gothenburg, Sweden). The present in vitro findings indicated that the use of the Cyanoacrylate Adhesive to bond orthodontic brackets to the enamel surface did not result in a significantly different (P 5 .24) shear bond force (mean 5 5.8 6 2.4 MPa) as compared to the control group (mean 5 5.2 6 2.9 MPa). The comparison of the Adhesive Remnant Index scores indicated that there was significantly (P 5 .006) less residual Adhesive remaining on the tooth with the Cyanoacrylate than on the tooth with the conventional Adhesive system. In conclusion, the new Adhesive has the potential to be used to bond orthodontic brackets while reducing the total bonding time. (Angle Orthod 2001;71:466-469.)
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Bonding orthodontic brackets to porcelain using different Adhesives/enamel conditioners: a comparative study.
World journal of orthodontics, 2005Co-Authors: Samir E. Bishara, Charuphan Oonsombat, Raed Ajlouni, John LaffoonAbstract:AIM: To evaluate the use of new Adhesive/primer materials, including an experimental self-etch primer and a cyanocrylate Adhesive, to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces. MATERIAL AND METHODS: Sixty porcelain maxillary central incisor teeth were used. The teeth were randomly divided into four groups: group 1, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite Adhesive; group 2, teeth were microetched, hydrofluoric acid and silane applied, and then the brackets were bonded with a composite Adhesive; group 3, an acid-etch primer was used, then the brackets were bonded with the same composite Adhesive as in the first 2 groups; group 4, teeth were etched with 35% phosphoric acid and the brackets were bonded with the Cyanoacrylate Adhesive. RESULTS: The analysis of variance comparing the groups tested (F = 9.446) indicated that there was a significant difference between the 4 groups. The Cyanoacrylate Adhesive had the lowest shear bond strength (mean = 1.7 +/- 2.1 MPa), followed by the conventional bonding using a 37% phosphoric acid etch and composite (mean = 2.1 +/- 1.2 MPa). The use of Transbond after microetching, with the application of hydrofluoric acid and silane, provided the highest shear bond strength (mean = 5.5 +/- 2.7 MPa). Transbond used with the acid etch-primer had a lower bond strength (mean = 3.8 +/- 2.5 MPa), but was not significantly different from the microetch/hydrofluoric acid/silane group. CONCLUSION: The results indicated that the use of a phosphoric acid etch with either a Cyanoacrylate or composite Adhesive to bond orthodontic brackets to porcelain surfaces produced significantly lower shear bond strength. Self-etch primers produced higher but less consistent shear bond strength for bonding orthodontic brackets. The most reliable bonding procedure to porcelain surfaces is through microetching with the use of hydrofluoric acid and a silane coupler before bonding, but this also produces the greatest damage to the porcelain surface.
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Effect of thermocycling on the shear bond strength of a Cyanoacrylate orthodontic Adhesive
American Journal of Orthodontics and Dentofacial Orthopedics, 2003Co-Authors: Samir E. Bishara, Raed Ajlouni, John LaffoonAbstract:The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a Cyanoacrylate Adhesive system, specifically 24 hours after bonding when the Adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned, polished, and randomly separated into 2 groups: group I, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37°C; and group II, Cyanoacrylate Adhesive debonded after thermocycling at 5°C and 55°C. The results of the t test comparing the 2 groups (t = 6.84) indicated significant differences between them (P = .0001). The Cyanoacrylate Adhesive at 24 hours had significantly greater shear bond strength (x̄ = 7.1 ± 3.3 MPa) than after thermocycling 500 times between 5°C and 55°C (x̄ = 1.5 ± 1.4 MPa). The findings indicated that the Cyanoacrylate Adhesive tested has clinically adequate shear bond strength at 24 hours after initial bonding but loses about 80% of its strength after thermocycling. The clinician should consider all properties of the Adhesive, including no need for a curing light, working time of 5 seconds before the Adhesive starts to set, and the significant decrease in bond strength after thermocycling.
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effect of thermocycling on the shear bond strength of a Cyanoacrylate orthodontic Adhesive
American Journal of Orthodontics and Dentofacial Orthopedics, 2003Co-Authors: Samir E. Bishara, Raed Ajlouni, John LaffoonAbstract:Abstract The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a Cyanoacrylate Adhesive system, specifically 24 hours after bonding when the Adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned, polished, and randomly separated into 2 groups: group I, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37°C; and group II, Cyanoacrylate Adhesive debonded after thermocycling at 5°C and 55°C. The results of the t test comparing the 2 groups (t = 6.84) indicated significant differences between them (P =.0001). The Cyanoacrylate Adhesive at 24 hours had significantly greater shear bond strength (x = 7.1 ± 3.3 MPa) than after thermocycling 500 times between 5°C and 55°C (x = 1.5 ± 1.4 MPa). The findings indicated that the Cyanoacrylate Adhesive tested has clinically adequate shear bond strength at 24 hours after initial bonding but loses about 80% of its strength after thermocycling. The clinician should consider all properties of the Adhesive, including no need for a curing light, working time of 5 seconds before the Adhesive starts to set, and the significant decrease in bond strength after thermocycling. (Am J Orthod Dentofacial Orthop 2003;123:21-4)
Raed Ajlouni - One of the best experts on this subject based on the ideXlab platform.
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Effect of water storage on the shear bond strength of a Cyanoacrylate Adhesive: clinical implications.
World journal of orthodontics, 2020Co-Authors: Raed Ajlouni, Samir E. Bishara, Charuphan OonsombatAbstract:AIM: To compare the effects of water storage on the shear bond strength of a Cyanoacrylate Adhesive system at three time intervals: (1) within 30 minutes after bonding the bracket to the tooth; (2) 24 hours from the time of bonding; and (3) after 30 days of storage in water at 37 degrees C. METHODS: Sixty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleansed and polished, then randomly separated into three groups: group 1, Cyanoacrylate Adhesive debonded within 30 minutes from initial bonding; group 2, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37 degrees C; group 3, Cyanoacrylate Adhesive debonded after 30 days immersion in deionized water at 37 degrees C. RESULTS: Analysis of variance (F = 11.94) comparing the experimental groups indicated the presence of significant differences between the three groups (P = .0001). The shear bond strengths were significantly greater in the two groups debonded after 30 minutes (mean = 5.8+/-2.4 MPa) and 24 hours (mean = 7.1+/-3.3 MPa) than the group debonded after 30 days of water storage (mean = 2.7+/-2.0 MPa). CONCLUSION: The present findings indicate that the Cyanoacrylate Adhesive has clinically adequate shear bond strengths at 30 minutes and 24 hours after initial bonding, but that the bond strength decreases by 50% within 30 days. The clinician needs to carefully take the overall properties of the Adhesive into consideration.
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Bonding orthodontic brackets to porcelain using different Adhesives/enamel conditioners: a comparative study.
World journal of orthodontics, 2005Co-Authors: Samir E. Bishara, Charuphan Oonsombat, Raed Ajlouni, John LaffoonAbstract:AIM: To evaluate the use of new Adhesive/primer materials, including an experimental self-etch primer and a cyanocrylate Adhesive, to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces. MATERIAL AND METHODS: Sixty porcelain maxillary central incisor teeth were used. The teeth were randomly divided into four groups: group 1, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite Adhesive; group 2, teeth were microetched, hydrofluoric acid and silane applied, and then the brackets were bonded with a composite Adhesive; group 3, an acid-etch primer was used, then the brackets were bonded with the same composite Adhesive as in the first 2 groups; group 4, teeth were etched with 35% phosphoric acid and the brackets were bonded with the Cyanoacrylate Adhesive. RESULTS: The analysis of variance comparing the groups tested (F = 9.446) indicated that there was a significant difference between the 4 groups. The Cyanoacrylate Adhesive had the lowest shear bond strength (mean = 1.7 +/- 2.1 MPa), followed by the conventional bonding using a 37% phosphoric acid etch and composite (mean = 2.1 +/- 1.2 MPa). The use of Transbond after microetching, with the application of hydrofluoric acid and silane, provided the highest shear bond strength (mean = 5.5 +/- 2.7 MPa). Transbond used with the acid etch-primer had a lower bond strength (mean = 3.8 +/- 2.5 MPa), but was not significantly different from the microetch/hydrofluoric acid/silane group. CONCLUSION: The results indicated that the use of a phosphoric acid etch with either a Cyanoacrylate or composite Adhesive to bond orthodontic brackets to porcelain surfaces produced significantly lower shear bond strength. Self-etch primers produced higher but less consistent shear bond strength for bonding orthodontic brackets. The most reliable bonding procedure to porcelain surfaces is through microetching with the use of hydrofluoric acid and a silane coupler before bonding, but this also produces the greatest damage to the porcelain surface.
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Effect of thermocycling on the shear bond strength of a Cyanoacrylate orthodontic Adhesive
American Journal of Orthodontics and Dentofacial Orthopedics, 2003Co-Authors: Samir E. Bishara, Raed Ajlouni, John LaffoonAbstract:The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a Cyanoacrylate Adhesive system, specifically 24 hours after bonding when the Adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned, polished, and randomly separated into 2 groups: group I, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37°C; and group II, Cyanoacrylate Adhesive debonded after thermocycling at 5°C and 55°C. The results of the t test comparing the 2 groups (t = 6.84) indicated significant differences between them (P = .0001). The Cyanoacrylate Adhesive at 24 hours had significantly greater shear bond strength (x̄ = 7.1 ± 3.3 MPa) than after thermocycling 500 times between 5°C and 55°C (x̄ = 1.5 ± 1.4 MPa). The findings indicated that the Cyanoacrylate Adhesive tested has clinically adequate shear bond strength at 24 hours after initial bonding but loses about 80% of its strength after thermocycling. The clinician should consider all properties of the Adhesive, including no need for a curing light, working time of 5 seconds before the Adhesive starts to set, and the significant decrease in bond strength after thermocycling.
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effect of thermocycling on the shear bond strength of a Cyanoacrylate orthodontic Adhesive
American Journal of Orthodontics and Dentofacial Orthopedics, 2003Co-Authors: Samir E. Bishara, Raed Ajlouni, John LaffoonAbstract:Abstract The purpose of this study was to evaluate the effects of thermocycling on the shear bond strength of a Cyanoacrylate Adhesive system, specifically 24 hours after bonding when the Adhesive has achieved most of its bond strength and after thermocycling. Forty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned, polished, and randomly separated into 2 groups: group I, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37°C; and group II, Cyanoacrylate Adhesive debonded after thermocycling at 5°C and 55°C. The results of the t test comparing the 2 groups (t = 6.84) indicated significant differences between them (P =.0001). The Cyanoacrylate Adhesive at 24 hours had significantly greater shear bond strength (x = 7.1 ± 3.3 MPa) than after thermocycling 500 times between 5°C and 55°C (x = 1.5 ± 1.4 MPa). The findings indicated that the Cyanoacrylate Adhesive tested has clinically adequate shear bond strength at 24 hours after initial bonding but loses about 80% of its strength after thermocycling. The clinician should consider all properties of the Adhesive, including no need for a curing light, working time of 5 seconds before the Adhesive starts to set, and the significant decrease in bond strength after thermocycling. (Am J Orthod Dentofacial Orthop 2003;123:21-4)
Charuphan Oonsombat - One of the best experts on this subject based on the ideXlab platform.
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Effect of water storage on the shear bond strength of a Cyanoacrylate Adhesive: clinical implications.
World journal of orthodontics, 2020Co-Authors: Raed Ajlouni, Samir E. Bishara, Charuphan OonsombatAbstract:AIM: To compare the effects of water storage on the shear bond strength of a Cyanoacrylate Adhesive system at three time intervals: (1) within 30 minutes after bonding the bracket to the tooth; (2) 24 hours from the time of bonding; and (3) after 30 days of storage in water at 37 degrees C. METHODS: Sixty freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleansed and polished, then randomly separated into three groups: group 1, Cyanoacrylate Adhesive debonded within 30 minutes from initial bonding; group 2, Cyanoacrylate Adhesive debonded after 24 hours immersion in deionized water at 37 degrees C; group 3, Cyanoacrylate Adhesive debonded after 30 days immersion in deionized water at 37 degrees C. RESULTS: Analysis of variance (F = 11.94) comparing the experimental groups indicated the presence of significant differences between the three groups (P = .0001). The shear bond strengths were significantly greater in the two groups debonded after 30 minutes (mean = 5.8+/-2.4 MPa) and 24 hours (mean = 7.1+/-3.3 MPa) than the group debonded after 30 days of water storage (mean = 2.7+/-2.0 MPa). CONCLUSION: The present findings indicate that the Cyanoacrylate Adhesive has clinically adequate shear bond strengths at 30 minutes and 24 hours after initial bonding, but that the bond strength decreases by 50% within 30 days. The clinician needs to carefully take the overall properties of the Adhesive into consideration.
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Bonding orthodontic brackets to porcelain using different Adhesives/enamel conditioners: a comparative study.
World journal of orthodontics, 2005Co-Authors: Samir E. Bishara, Charuphan Oonsombat, Raed Ajlouni, John LaffoonAbstract:AIM: To evaluate the use of new Adhesive/primer materials, including an experimental self-etch primer and a cyanocrylate Adhesive, to enhance the shear strength of orthodontic brackets bonded to porcelain surfaces. MATERIAL AND METHODS: Sixty porcelain maxillary central incisor teeth were used. The teeth were randomly divided into four groups: group 1, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite Adhesive; group 2, teeth were microetched, hydrofluoric acid and silane applied, and then the brackets were bonded with a composite Adhesive; group 3, an acid-etch primer was used, then the brackets were bonded with the same composite Adhesive as in the first 2 groups; group 4, teeth were etched with 35% phosphoric acid and the brackets were bonded with the Cyanoacrylate Adhesive. RESULTS: The analysis of variance comparing the groups tested (F = 9.446) indicated that there was a significant difference between the 4 groups. The Cyanoacrylate Adhesive had the lowest shear bond strength (mean = 1.7 +/- 2.1 MPa), followed by the conventional bonding using a 37% phosphoric acid etch and composite (mean = 2.1 +/- 1.2 MPa). The use of Transbond after microetching, with the application of hydrofluoric acid and silane, provided the highest shear bond strength (mean = 5.5 +/- 2.7 MPa). Transbond used with the acid etch-primer had a lower bond strength (mean = 3.8 +/- 2.5 MPa), but was not significantly different from the microetch/hydrofluoric acid/silane group. CONCLUSION: The results indicated that the use of a phosphoric acid etch with either a Cyanoacrylate or composite Adhesive to bond orthodontic brackets to porcelain surfaces produced significantly lower shear bond strength. Self-etch primers produced higher but less consistent shear bond strength for bonding orthodontic brackets. The most reliable bonding procedure to porcelain surfaces is through microetching with the use of hydrofluoric acid and a silane coupler before bonding, but this also produces the greatest damage to the porcelain surface.
Tomoharu Kiyosawa - One of the best experts on this subject based on the ideXlab platform.
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Sutureless Microvascular Anastomosis using Intravascular Stenting and Cyanoacrylate Adhesive.
Journal of Reconstructive Microsurgery, 2017Co-Authors: Tetsushi Aizawa, Masahiro Kuwabara, Satoshi Kubo, Takashi Domoto, Shimpo Aoki, Ryuichi Azuma, Tomoharu KiyosawaAbstract:Background Microvascular anastomosis using Cyanoacrylate Adhesive has a reputation among researchers as an alternative to conventional sutures. However, a degree of ingenuity is required to avoid the collapse of the vascular lumen for the duration of the anastomosis. The aim of this study was to determine the feasibility of intravascular stenting (IVaS) as a temporary stent during sutureless microvascular anastomosis with Cyanoacrylate Adhesive. Methods Sixty male Fisher 344 rats were evenly divided into two groups. The right superficial femoral arteries (RSFAs) were transected in each group. Microvascular anastomoses were then performed with the sutureless (SL) method in one group and conventional sutures (CS) in the other group. The diameter of the RSFA, duration of microvascular anastomosis, and the patency of the RSFA were evaluated immediately after anastomosis and 7 days after the surgery. Tissue samples were obtained for pathological consideration. Results There was no significant difference in the diameter of the RSFAs between the SL and the CS groups. There was no significant difference in the patency rates of the groups. The anastomosis time of the SL group was significantly shorter than that of the CS group, regardless of the experience of the surgeons. A histological analysis showed a comparable level of foreign body reactions in each group. Conclusion IVaS plays a supportive role in sutureless microvascular anastomosis with Cyanoacrylate Adhesive. The short-term safety of this technique has now been confirmed at the experimental stage.
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Sutureless Microvascular Anastomosis using Intravascular Stenting and Cyanoacrylate Adhesive.
Journal of reconstructive microsurgery, 2017Co-Authors: Tetsushi Aizawa, Masahiro Kuwabara, Satoshi Kubo, Takashi Domoto, Shimpo Aoki, Ryuichi Azuma, Tomoharu KiyosawaAbstract:Microvascular anastomosis using Cyanoacrylate Adhesive has a reputation among researchers as an alternative to conventional sutures. However, a degree of ingenuity is required to avoid the collapse of the vascular lumen for the duration of the anastomosis. The aim of this study was to determine the feasibility of intravascular stenting (IVaS) as a temporary stent during sutureless microvascular anastomosis with Cyanoacrylate Adhesive. Sixty male Fisher 344 rats were evenly divided into two groups. The right superficial femoral arteries (RSFAs) were transected in each group. Microvascular anastomoses were then performed with the sutureless (SL) method in one group and conventional sutures (CS) in the other group. The diameter of the RSFA, duration of microvascular anastomosis, and the patency of the RSFA were evaluated immediately after anastomosis and 7 days after the surgery. Tissue samples were obtained for pathological consideration. There was no significant difference in the diameter of the RSFAs between the SL and the CS groups. There was no significant difference in the patency rates of the groups. The anastomosis time of the SL group was significantly shorter than that of the CS group, regardless of the experience of the surgeons. A histological analysis showed a comparable level of foreign body reactions in each group. IVaS plays a supportive role in sutureless microvascular anastomosis with Cyanoacrylate Adhesive. The short-term safety of this technique has now been confirmed at the experimental stage. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.
