Gilberto Antonio Borges | University of Uberaba (original) (raw)
Papers by Gilberto Antonio Borges
Journal of Clinical Dentistry and Research, 2021
Objetivo: O objetivo do presente trabalho foi avaliar os efeitos de tratamentos de superfície na ... more Objetivo: O objetivo do presente trabalho foi avaliar os efeitos de tratamentos de superfície na resistência de união da zircônia tetragonal parcialmente estabilizada por ítria (Y-TZP). Métodos: Dois tipos de cerâmicas Y-TZP (Zirconia Cercon®, Dentsply DeguDent e Zirconia Prettau® An- terior®, Zirkonzahn) foram condicionados e divididos em seis grupos: G1) Cercon-Al2 O3 50μm; G2) Cercon-Al2 O3 50μm + Rocatec Soft; G3) Cercon- Al2 O3 50μm + Rocatec Plus; G4) Prettau Anterior-Al2 O3 110μm; G5) Prettau Anterior-Al2 O3 110μm + Rocatec Soft; e G6) Prettau Anterior-Al2 O3 110μm + Rocatec Plus. Matrizes confeccionadas em silicone por condensação, com espessura de 0,5mm e três orifícios internos de 0,8mm de diâmetro, foram posicionadas sobre os discos de zircônia. O cimento resinoso Variolink II (Ivoclar Vivadent) foi manipulado de acordo com as instruções do fabricante e inserido nos orifícios das matrizes. Sobre a matriz de silicone, foram posicionadas tiras de poliéster e uma lâmina de v...
Brazilian Dental Journal
The aim of this study was to analyze the influence of orthodontic bracket type (metallic or ceram... more The aim of this study was to analyze the influence of orthodontic bracket type (metallic or ceramic) and mouthguard on biomechanical response during impact. Two-dimensional plane-strain models of a patient with increased positive overjet of the maxillary central incisor was created based on a CT scan, simulating the periodontal ligament, bone support, gingival tissue, orthodontic brackets (metallic or ceramic) and mouthguard. A nonlinear dynamic impact finite element analysis was performed in which a steel object hit the model at 1 m/s. Stress distributions (Von Mises and Modified Von Mises) and strain were evaluated. Stress distributions were affected by the bracket presence and type. Models with metallic and ceramic bracket had higher stresses over a larger buccal enamel impact area. Models with ceramic brackets generated higher stresses than the metallic brackets. Mouthguards reduced the stress and strain values regardless of bracket type. Mouthguard shock absorption were 88.37% ...
Journal of Clinical Dentistry and Research
Brazilian dental journal
The aim was to evaluate the influence of different dentin preparation mode in the smear layer cha... more The aim was to evaluate the influence of different dentin preparation mode in the smear layer characteristics (SL), hybrid layer (HL), and microtensile bond strength (µTBS) to dentin with two resin cements. The occlusal dentin of 120 third molars was exposed. The teeth were divided into 4 groups (n=30) according to the dentin preparation mode: 1- fine grain diamond bur; 2- coarse grain diamond bur; 3- multi laminate carbide steel bur; and, 4- ultrasonic CV Dentus diamond bur. Each treated dentin group was divided into 2 sub-groups (n=15) according to the resin cement: (1) RelyX U200 and (2) RelyX ARC. Resin composite blocks were cemented on dentin. After storage at 37o C for 24 h, beams with a cross section area of 1.0 mm2 were obtained, and tested in a universal testing machine at a crosshead speed of 0.5 mm/min. Two additional teeth for each sub-group were prepared to analyze the SL and HL on a scanning electron microscopy. According to Kruskal-Wallis test and Dunn tests, there wa...
The Open Dentistry Journal
Objective: The aim was to evaluate, in vitro, the tensile bond strength to dentin of Scotchbond U... more Objective: The aim was to evaluate, in vitro, the tensile bond strength to dentin of Scotchbond Universal (SU), All-Bond Universal (AU) and One Coat 7 Universal (OC7) adhesives applied in self-etch mode, after 24 h of storage and after 500,000 loading cycles, using Clearfil SE Bond (SE) as a control. Materials and Methods: The adhesives were applied on the dentin of bovine teeth, followed by the application of a composite resin. Thirty specimens were obtained for each adhesive. Half of the specimens were submitted to cyclic loading for 500,000 cycles. All specimens were submitted to a tensile bond strength test in a universal testing machine at a crosshead speed of 0.5 mm/minute. Results: According to two-way ANOVA and Tukey’s test (α=5%), the interaction between the adhesive and cyclic loading factors was significant (p=0.001). The means followed by the same letter represent no significant difference in the bond strength (MPa) after 24 h: OC7=7.86A (±2.90), SU=6.78AB (±2.03), AU=5....
Dental press journal of orthodontics, 2017
Material biodegradation that occurs in the mouth may interfere in the bonding strength between th... more Material biodegradation that occurs in the mouth may interfere in the bonding strength between the bracket and the enamel, causing lower bond strength values in vivo, in comparison with in vitro studies. To develop a prototype to measure bracket debonding force in vivo and to evaluate, in vitro, the bond strength obtained with the prototype. A original plier (3M Unitek) was modified by adding one strain gauge directly connected to its claw. An electronic circuit performed the reading of the strain gauge, and the software installed in a computer recorded the values of the bracket debonding force, in kgf. Orthodontic brackets were bonded to the facial surface of 30 bovine incisors with adhesive materials. In Group 1 (n = 15), debonding was carried out with the prototype, while tensile bond strength testing was performed in Group 2 (n = 15). A universal testing machine was used for the second group. The adhesive remnant index (ARI) was recorded. According to Student's t test (α = 0...
Quintessence Publicacion Internacional De Odontologia, 2014
Quintessence Tecnica, Mar 1, 2011
British Journal of Applied Science & Technology, 2015
British Journal of Applied Science & Technology, 2015
Brazilian oral research, 2015
This study evaluated the influence of an alternative surface treatment on the microshear bond str... more This study evaluated the influence of an alternative surface treatment on the microshear bond strength (μsbs) of zirconia-based ceramic. Thirty-five zirconia disks were assigned to five groups according to the following treatments: Control (CO), glass and silane were not applied to the zirconia surface; G1, air blasted with 100μm glass beads + glaze + silane; G2, a gel containing 15% (by weight) glass beads applied to the ceramic surface + glaze + silane; G3, a gel containing 25% (by weight) glass beads applied to the ceramic surface + glaze + silane; and G4, a gel containing 50% (by weight) glass beads applied to the ceramic surface + glaze + silane. The specimens were built up using RelyX ARC®, according to the manufacturer's recommendations, and inserted in an elastomeric mold with an inner diameter of 0.8 mm. The μsbs test was performed using a testing machine at a crosshead speed of 0.5 mm/min. ANOVA and Tukey's test (p < 0.05) were applied to the bond strength value...
Operative Dentistry, 2009
Clinical Relevance The application of indirect resin composites for full-coverage restorative pur... more Clinical Relevance The application of indirect resin composites for full-coverage restorative purposes still remains a concern due to wear. New indirect composites behave differently under different wear-testing conditions. Overall, Belleglass-NG showed the lowest wear when tested in vitro under different wear tests.
Operative Dentistry, 2008
Clinical Relevance Achieving a high degree of cure throughout a 2 mm thickness of light-activated... more Clinical Relevance Achieving a high degree of cure throughout a 2 mm thickness of light-activated resin composite did not occur for many types and shades of resin composite. Clinicians should check the depth of cure by using the scraping method.
Operative Dentistry, 2009
Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the... more Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the ceramic surface treatment, which is dependent on the ceramic composition.
Operative Dentistry, 2009
Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the... more Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the ceramic surface treatment, which is dependent on the ceramic composition.
Journal …, 2008
The optimal degree of curing throughout the bulk of a visible light-activated dental resin compos... more The optimal degree of curing throughout the bulk of a visible light-activated dental resin composite is acknowledged to be important to the clinical success of a resin composite restoration. Unfortunately, the dentist has no means of monitoring the cure of the resin surfaces not directly exposed to the curing light. Techniques, such as the layered buildup of restorations in 2 mm increments with longer activation times than 20 seconds, have been suggested. This study investigated the depth of cure (DOC) of a commercial resin composite in three types: flowable, hybrid and packable and in three shades: B1, A3 and D3 after 20 second activation with a quartz halogen light (620 mW/cm 2). Depth of cure was measured by scraping the uncured material and by using a Knoop Hardness profile, starting from the surface exposed to the light. Using a minimum Knoop Hardness ratio of 0.8 bottom/top only, the flowable in shade B1 achieved a 2 mm DOC. Using the less restrictive scraping test, only the B1 shade of flowable and hybrid significantly exceeded a 2 mm DOC. Knoop Hardness at the DOC obtained by scraping ranged from 55%-70% of the top surface hardness. These data suggest that a 2 mm buildup layering technique may not result in adequate curing of the bottom layer for such a wide range of materials and that manufacturers need to pro-©
Journal Information, 2009
The application of indirect resin composites for full-coverage restorative purposes still remains... more The application of indirect resin composites for full-coverage restorative purposes still remains a concern due to wear. New indirect composites behave differently under different wear-testing conditions. Overall, Belleglass-NG showed the lowest wear when tested in vitro under different wear tests.
The Journal of prosthetic …, 2003
Five copings each of IPS Empress, IPS Empress 2 (0.8 mm thick), Cergogold (0.7 mm thick), In-Cera... more Five copings each of IPS Empress, IPS Empress 2 (0.8 mm thick), Cergogold (0.7 mm thick), In-Ceram Alumina, In-Ceram Zirconia, and Procera (0.8 mm thick) were fabricated following the manufacturer's instructions. Each coping was longitudinally sectioned into 4 equal parts ...
Rev Odonto Cienc, Mar 1, 2003
Journal of Clinical Dentistry and Research, 2021
Objetivo: O objetivo do presente trabalho foi avaliar os efeitos de tratamentos de superfície na ... more Objetivo: O objetivo do presente trabalho foi avaliar os efeitos de tratamentos de superfície na resistência de união da zircônia tetragonal parcialmente estabilizada por ítria (Y-TZP). Métodos: Dois tipos de cerâmicas Y-TZP (Zirconia Cercon®, Dentsply DeguDent e Zirconia Prettau® An- terior®, Zirkonzahn) foram condicionados e divididos em seis grupos: G1) Cercon-Al2 O3 50μm; G2) Cercon-Al2 O3 50μm + Rocatec Soft; G3) Cercon- Al2 O3 50μm + Rocatec Plus; G4) Prettau Anterior-Al2 O3 110μm; G5) Prettau Anterior-Al2 O3 110μm + Rocatec Soft; e G6) Prettau Anterior-Al2 O3 110μm + Rocatec Plus. Matrizes confeccionadas em silicone por condensação, com espessura de 0,5mm e três orifícios internos de 0,8mm de diâmetro, foram posicionadas sobre os discos de zircônia. O cimento resinoso Variolink II (Ivoclar Vivadent) foi manipulado de acordo com as instruções do fabricante e inserido nos orifícios das matrizes. Sobre a matriz de silicone, foram posicionadas tiras de poliéster e uma lâmina de v...
Brazilian Dental Journal
The aim of this study was to analyze the influence of orthodontic bracket type (metallic or ceram... more The aim of this study was to analyze the influence of orthodontic bracket type (metallic or ceramic) and mouthguard on biomechanical response during impact. Two-dimensional plane-strain models of a patient with increased positive overjet of the maxillary central incisor was created based on a CT scan, simulating the periodontal ligament, bone support, gingival tissue, orthodontic brackets (metallic or ceramic) and mouthguard. A nonlinear dynamic impact finite element analysis was performed in which a steel object hit the model at 1 m/s. Stress distributions (Von Mises and Modified Von Mises) and strain were evaluated. Stress distributions were affected by the bracket presence and type. Models with metallic and ceramic bracket had higher stresses over a larger buccal enamel impact area. Models with ceramic brackets generated higher stresses than the metallic brackets. Mouthguards reduced the stress and strain values regardless of bracket type. Mouthguard shock absorption were 88.37% ...
Journal of Clinical Dentistry and Research
Brazilian dental journal
The aim was to evaluate the influence of different dentin preparation mode in the smear layer cha... more The aim was to evaluate the influence of different dentin preparation mode in the smear layer characteristics (SL), hybrid layer (HL), and microtensile bond strength (µTBS) to dentin with two resin cements. The occlusal dentin of 120 third molars was exposed. The teeth were divided into 4 groups (n=30) according to the dentin preparation mode: 1- fine grain diamond bur; 2- coarse grain diamond bur; 3- multi laminate carbide steel bur; and, 4- ultrasonic CV Dentus diamond bur. Each treated dentin group was divided into 2 sub-groups (n=15) according to the resin cement: (1) RelyX U200 and (2) RelyX ARC. Resin composite blocks were cemented on dentin. After storage at 37o C for 24 h, beams with a cross section area of 1.0 mm2 were obtained, and tested in a universal testing machine at a crosshead speed of 0.5 mm/min. Two additional teeth for each sub-group were prepared to analyze the SL and HL on a scanning electron microscopy. According to Kruskal-Wallis test and Dunn tests, there wa...
The Open Dentistry Journal
Objective: The aim was to evaluate, in vitro, the tensile bond strength to dentin of Scotchbond U... more Objective: The aim was to evaluate, in vitro, the tensile bond strength to dentin of Scotchbond Universal (SU), All-Bond Universal (AU) and One Coat 7 Universal (OC7) adhesives applied in self-etch mode, after 24 h of storage and after 500,000 loading cycles, using Clearfil SE Bond (SE) as a control. Materials and Methods: The adhesives were applied on the dentin of bovine teeth, followed by the application of a composite resin. Thirty specimens were obtained for each adhesive. Half of the specimens were submitted to cyclic loading for 500,000 cycles. All specimens were submitted to a tensile bond strength test in a universal testing machine at a crosshead speed of 0.5 mm/minute. Results: According to two-way ANOVA and Tukey’s test (α=5%), the interaction between the adhesive and cyclic loading factors was significant (p=0.001). The means followed by the same letter represent no significant difference in the bond strength (MPa) after 24 h: OC7=7.86A (±2.90), SU=6.78AB (±2.03), AU=5....
Dental press journal of orthodontics, 2017
Material biodegradation that occurs in the mouth may interfere in the bonding strength between th... more Material biodegradation that occurs in the mouth may interfere in the bonding strength between the bracket and the enamel, causing lower bond strength values in vivo, in comparison with in vitro studies. To develop a prototype to measure bracket debonding force in vivo and to evaluate, in vitro, the bond strength obtained with the prototype. A original plier (3M Unitek) was modified by adding one strain gauge directly connected to its claw. An electronic circuit performed the reading of the strain gauge, and the software installed in a computer recorded the values of the bracket debonding force, in kgf. Orthodontic brackets were bonded to the facial surface of 30 bovine incisors with adhesive materials. In Group 1 (n = 15), debonding was carried out with the prototype, while tensile bond strength testing was performed in Group 2 (n = 15). A universal testing machine was used for the second group. The adhesive remnant index (ARI) was recorded. According to Student's t test (α = 0...
Quintessence Publicacion Internacional De Odontologia, 2014
Quintessence Tecnica, Mar 1, 2011
British Journal of Applied Science & Technology, 2015
British Journal of Applied Science & Technology, 2015
Brazilian oral research, 2015
This study evaluated the influence of an alternative surface treatment on the microshear bond str... more This study evaluated the influence of an alternative surface treatment on the microshear bond strength (μsbs) of zirconia-based ceramic. Thirty-five zirconia disks were assigned to five groups according to the following treatments: Control (CO), glass and silane were not applied to the zirconia surface; G1, air blasted with 100μm glass beads + glaze + silane; G2, a gel containing 15% (by weight) glass beads applied to the ceramic surface + glaze + silane; G3, a gel containing 25% (by weight) glass beads applied to the ceramic surface + glaze + silane; and G4, a gel containing 50% (by weight) glass beads applied to the ceramic surface + glaze + silane. The specimens were built up using RelyX ARC®, according to the manufacturer's recommendations, and inserted in an elastomeric mold with an inner diameter of 0.8 mm. The μsbs test was performed using a testing machine at a crosshead speed of 0.5 mm/min. ANOVA and Tukey's test (p < 0.05) were applied to the bond strength value...
Operative Dentistry, 2009
Clinical Relevance The application of indirect resin composites for full-coverage restorative pur... more Clinical Relevance The application of indirect resin composites for full-coverage restorative purposes still remains a concern due to wear. New indirect composites behave differently under different wear-testing conditions. Overall, Belleglass-NG showed the lowest wear when tested in vitro under different wear tests.
Operative Dentistry, 2008
Clinical Relevance Achieving a high degree of cure throughout a 2 mm thickness of light-activated... more Clinical Relevance Achieving a high degree of cure throughout a 2 mm thickness of light-activated resin composite did not occur for many types and shades of resin composite. Clinicians should check the depth of cure by using the scraping method.
Operative Dentistry, 2009
Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the... more Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the ceramic surface treatment, which is dependent on the ceramic composition.
Operative Dentistry, 2009
Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the... more Clinical Relevance The bond strength between ceramics and a resin luting agent is affected by the ceramic surface treatment, which is dependent on the ceramic composition.
Journal …, 2008
The optimal degree of curing throughout the bulk of a visible light-activated dental resin compos... more The optimal degree of curing throughout the bulk of a visible light-activated dental resin composite is acknowledged to be important to the clinical success of a resin composite restoration. Unfortunately, the dentist has no means of monitoring the cure of the resin surfaces not directly exposed to the curing light. Techniques, such as the layered buildup of restorations in 2 mm increments with longer activation times than 20 seconds, have been suggested. This study investigated the depth of cure (DOC) of a commercial resin composite in three types: flowable, hybrid and packable and in three shades: B1, A3 and D3 after 20 second activation with a quartz halogen light (620 mW/cm 2). Depth of cure was measured by scraping the uncured material and by using a Knoop Hardness profile, starting from the surface exposed to the light. Using a minimum Knoop Hardness ratio of 0.8 bottom/top only, the flowable in shade B1 achieved a 2 mm DOC. Using the less restrictive scraping test, only the B1 shade of flowable and hybrid significantly exceeded a 2 mm DOC. Knoop Hardness at the DOC obtained by scraping ranged from 55%-70% of the top surface hardness. These data suggest that a 2 mm buildup layering technique may not result in adequate curing of the bottom layer for such a wide range of materials and that manufacturers need to pro-©
Journal Information, 2009
The application of indirect resin composites for full-coverage restorative purposes still remains... more The application of indirect resin composites for full-coverage restorative purposes still remains a concern due to wear. New indirect composites behave differently under different wear-testing conditions. Overall, Belleglass-NG showed the lowest wear when tested in vitro under different wear tests.
The Journal of prosthetic …, 2003
Five copings each of IPS Empress, IPS Empress 2 (0.8 mm thick), Cergogold (0.7 mm thick), In-Cera... more Five copings each of IPS Empress, IPS Empress 2 (0.8 mm thick), Cergogold (0.7 mm thick), In-Ceram Alumina, In-Ceram Zirconia, and Procera (0.8 mm thick) were fabricated following the manufacturer's instructions. Each coping was longitudinally sectioned into 4 equal parts ...
Rev Odonto Cienc, Mar 1, 2003