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Nemat Hoseini - One of the best experts on this subject based on the ideXlab platform.
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comparison of the load deflection characteristics of aesthetic and conventional super elastic ni ti orthodontic arch Wires in conventional and metal insert ceramic brackets
Journal of clinical and diagnostic research : JCDR, 2016Co-Authors: Hosseinagha Aghili, Soghra Yassaei, Neda Joshan, Nemat HoseiniAbstract:INTRODUCTION Coated arch Wires and ceramic brackets have been introduced to improve aesthetics during orthodontic treatment. AIM The aim of this study was to determine the effects of coating on the physical properties of aesthetic orthodontic Wires. Material AND METHODS Five round Wires (0.016 inch) were obtained from each of three brands: conventional uncoated super elastic Nickel Titanium (Ni-Ti) (Rematitian Lite; Dentaurum, Ispringen, Germany), HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) which belonged to maxillary arch. Two types of standard ceramic brackets (conventional and metal-insert type, Ortho Technology, Tampa, Florida, USA) with the slot size of 0.022×0.028 inches were used. A simulation device was fabricated to resemble a model of human dental arch and each of the specimen was tested in three-point bending test. The test was conducted in the buccolingual plane with crosshead speed of 1mm/minute pressure from metal pole. Each sample was loaded until a deflection of 3.0 mm was produced. The mean values of maximum loading force, unloading force and clinical plateau length were recorded. One-way ANOVA and Tukey tests were used at p<0.05. RESULTS Uncoated Ni-Ti arch wire showed higher mean values of maximum loading and unloading force than that of coated aesthetic Wires similar to ceramic brackets while G&H wire and metal-insert ceramic brackets presented the lowest values. The longest clinical plateau length was observed in G&H Wires and metal-insert ceramic bracket. CONCLUSION The coating processes for HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) Wires might influence bending behaviour which can cause decrease in loading and unloading force.
Hosseinagha Aghili - One of the best experts on this subject based on the ideXlab platform.
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comparison of the load deflection characteristics of aesthetic and conventional super elastic ni ti orthodontic arch Wires in conventional and metal insert ceramic brackets
Journal of clinical and diagnostic research : JCDR, 2016Co-Authors: Hosseinagha Aghili, Soghra Yassaei, Neda Joshan, Nemat HoseiniAbstract:INTRODUCTION Coated arch Wires and ceramic brackets have been introduced to improve aesthetics during orthodontic treatment. AIM The aim of this study was to determine the effects of coating on the physical properties of aesthetic orthodontic Wires. Material AND METHODS Five round Wires (0.016 inch) were obtained from each of three brands: conventional uncoated super elastic Nickel Titanium (Ni-Ti) (Rematitian Lite; Dentaurum, Ispringen, Germany), HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) which belonged to maxillary arch. Two types of standard ceramic brackets (conventional and metal-insert type, Ortho Technology, Tampa, Florida, USA) with the slot size of 0.022×0.028 inches were used. A simulation device was fabricated to resemble a model of human dental arch and each of the specimen was tested in three-point bending test. The test was conducted in the buccolingual plane with crosshead speed of 1mm/minute pressure from metal pole. Each sample was loaded until a deflection of 3.0 mm was produced. The mean values of maximum loading force, unloading force and clinical plateau length were recorded. One-way ANOVA and Tukey tests were used at p<0.05. RESULTS Uncoated Ni-Ti arch wire showed higher mean values of maximum loading and unloading force than that of coated aesthetic Wires similar to ceramic brackets while G&H wire and metal-insert ceramic brackets presented the lowest values. The longest clinical plateau length was observed in G&H Wires and metal-insert ceramic bracket. CONCLUSION The coating processes for HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) Wires might influence bending behaviour which can cause decrease in loading and unloading force.
Soghra Yassaei - One of the best experts on this subject based on the ideXlab platform.
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comparison of the load deflection characteristics of aesthetic and conventional super elastic ni ti orthodontic arch Wires in conventional and metal insert ceramic brackets
Journal of clinical and diagnostic research : JCDR, 2016Co-Authors: Hosseinagha Aghili, Soghra Yassaei, Neda Joshan, Nemat HoseiniAbstract:INTRODUCTION Coated arch Wires and ceramic brackets have been introduced to improve aesthetics during orthodontic treatment. AIM The aim of this study was to determine the effects of coating on the physical properties of aesthetic orthodontic Wires. Material AND METHODS Five round Wires (0.016 inch) were obtained from each of three brands: conventional uncoated super elastic Nickel Titanium (Ni-Ti) (Rematitian Lite; Dentaurum, Ispringen, Germany), HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) which belonged to maxillary arch. Two types of standard ceramic brackets (conventional and metal-insert type, Ortho Technology, Tampa, Florida, USA) with the slot size of 0.022×0.028 inches were used. A simulation device was fabricated to resemble a model of human dental arch and each of the specimen was tested in three-point bending test. The test was conducted in the buccolingual plane with crosshead speed of 1mm/minute pressure from metal pole. Each sample was loaded until a deflection of 3.0 mm was produced. The mean values of maximum loading force, unloading force and clinical plateau length were recorded. One-way ANOVA and Tukey tests were used at p<0.05. RESULTS Uncoated Ni-Ti arch wire showed higher mean values of maximum loading and unloading force than that of coated aesthetic Wires similar to ceramic brackets while G&H wire and metal-insert ceramic brackets presented the lowest values. The longest clinical plateau length was observed in G&H Wires and metal-insert ceramic bracket. CONCLUSION The coating processes for HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) Wires might influence bending behaviour which can cause decrease in loading and unloading force.
Neda Joshan - One of the best experts on this subject based on the ideXlab platform.
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comparison of the load deflection characteristics of aesthetic and conventional super elastic ni ti orthodontic arch Wires in conventional and metal insert ceramic brackets
Journal of clinical and diagnostic research : JCDR, 2016Co-Authors: Hosseinagha Aghili, Soghra Yassaei, Neda Joshan, Nemat HoseiniAbstract:INTRODUCTION Coated arch Wires and ceramic brackets have been introduced to improve aesthetics during orthodontic treatment. AIM The aim of this study was to determine the effects of coating on the physical properties of aesthetic orthodontic Wires. Material AND METHODS Five round Wires (0.016 inch) were obtained from each of three brands: conventional uncoated super elastic Nickel Titanium (Ni-Ti) (Rematitian Lite; Dentaurum, Ispringen, Germany), HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) which belonged to maxillary arch. Two types of standard ceramic brackets (conventional and metal-insert type, Ortho Technology, Tampa, Florida, USA) with the slot size of 0.022×0.028 inches were used. A simulation device was fabricated to resemble a model of human dental arch and each of the specimen was tested in three-point bending test. The test was conducted in the buccolingual plane with crosshead speed of 1mm/minute pressure from metal pole. Each sample was loaded until a deflection of 3.0 mm was produced. The mean values of maximum loading force, unloading force and clinical plateau length were recorded. One-way ANOVA and Tukey tests were used at p<0.05. RESULTS Uncoated Ni-Ti arch wire showed higher mean values of maximum loading and unloading force than that of coated aesthetic Wires similar to ceramic brackets while G&H wire and metal-insert ceramic brackets presented the lowest values. The longest clinical plateau length was observed in G&H Wires and metal-insert ceramic bracket. CONCLUSION The coating processes for HUBIT (Teflon Coated, Korea), G&H (Epoxy Coated, Greenwood, Indiana, USA) Wires might influence bending behaviour which can cause decrease in loading and unloading force.
Oliveira,dauro Douglas - One of the best experts on this subject based on the ideXlab platform.
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Physical and chemical properties of orthodontic brackets after 12 and 24 months: in situ study
Faculdade De Odontologia De Bauru - USP, 2014Co-Authors: Mendes,bernardo De Azevedo Bahia, Ferreira,ricardo Alberto Neto, Pithon,matheus Melo, Horta,martinho Campolina Rebello, Oliveira,dauro DouglasAbstract:Objective: The aim of this article was to assess how intraoral biodegradation influenced the surface characteristics and friction levels of metallic brackets used during 12 and 24 months of orthodontic treatment and also to compare the static friction generated in these brackets with four different methods of the ligation of orthodontic Wires. Material and Methods: Seventy premolar brackets as received from the manufacturer and 224 brackets that were used in previous orthodontic treatments were evaluated in this experiment. The surface morphology and the composition of the deposits found in the brackets were evaluated with rugosimetry, scanning electron microscopy, and energy dispersive X-ray spectroscopy. Friction was analyzed by applying tensile tests simulating sliding mechanics with a 0.019x0.025" steel wire. The static friction levels produced by the following ligation methods were evaluated: loosely attached steel ligature around all four bracket wings, steel ligature attached to only two wings, conventional elastomeric ligation around all 4 bracket wings, and non-conventional Slide® elastomeric ligature. Results: The results demonstrated the presence of biodegradation effects such as corrosion pits, plastic deformation, cracks, and Material deposits. The main chemical elements found on these deposits were Carbon and Oxygen. The maximum friction produced by each ligation method changed according to the time of intraoral use. The steel ligature loosely attached to all four bracket wings produced the lowest friction levels in the new brackets. The conventional elastic ligatures generated the highest friction levels. The metallic brackets underwent significant degradation during orthodontic treatment, showing an increase in surface roughness and the deposit of chemical elements on the surface. Conclusion: The levels of static friction decreased with use. The non-conventional elastic ligatures were the best alternative to reduce friction
