45 research outputs found
Biomechanical performance of endocrown and core-crown restorations: a systematic review
No full textThe purpose of this study is to assess and compare, through a systematic review of the literature, the biomechanical performance of endocrowns and traditional core-crowns (with and without intracanal post) for the rehabilitation of endodontically treated teeth with severe coronal structure damage
Biomechanical performance of endocrown and core-crown restorations: a systematic review
No full textThe purpose of this study is to assess and compare, through a systematic review of the literature, the biomechanical performance of endocrowns and traditional core-crowns (with and without intracanal post) for the rehabilitation of endodontically treated teeth with severe coronal structure damage
Biomechanical performance of endocrown and core-crown restorations: a systematic review
No full textThe purpose of this study is to assess and compare, through a systematic review of the literature, the biomechanical performance of endocrowns and traditional core-crowns (with and without intracanal post) for the rehabilitation of endodontically treated teeth with severe coronal structure damage
Effect Of Vertical Misfit And Clip Material On Stress Distribution Of Overdentures Under Masticatory Loading
No full textFramework misfit is a common problem observed in overdentures, which might result in prosthetic and biological complications. The aim of this study was to evaluate the influence of vertical misfit and clip material on the stress distribution in an overdenture-retaining bar system under masticatory loading. A 3-D finite element model of a resorbed jaw was created, including two implants and a bar-clip retained overdenture. A pressure of 100 MPa was applied to the right mandibular first molar. Different vertical misfit levels (50, 100, and 200 A mu m) and clip materials (plastic or gold) were evaluated. Data were evaluated using von Mises stress and microstrain. Vertical misfit amplification caused an increase in the microstrain values in the peri-implant bone tissue next to the ill-fitted component and increased the stresses in the prosthetic screws. The clip material influenced the stress and microstrain distribution in the prosthetic components and bone tissue. The levels of vertical misfit seem to be closely linked with the stress values in the prosthetic screws, mainly to that of the ill-fitted component. The gold clip presented an increase in the stress compared to the plastic clip.54101515152
Discussing the maintenance protocols for implant-supported dental prostheses longevity: a scoping review
No full textThis scoping review aims to discuss the available hygiene protocols for home care procedures, besides methods and periodicity of professional maintenance for the implant-supported restorations, including unitary, partial and full-arch systems, even fixed or removable
Discussing the maintenance protocols for implant-supported dental prostheses longevity: a scoping review
No full textThis scoping review aims to discuss the available hygiene protocols for home care procedures, besides methods and periodicity of professional maintenance for the implant-supported restorations, including unitary, partial and full-arch systems, even fixed or removable
Effect of vertical misfit and clip material on stress distribution of overdentures under masticatory loading
No full textFramework misfit is a common problem observed in overdentures, which might result in prosthetic and biological complications. The aim of this study was to evaluate the influence of vertical misfit and clip material on the stress distribution in an overdenture-retaining bar system under masticatory loading. A 3-D finite element model of a resorbed jaw was created, including two implants and a bar-clip retained overdenture. A pressure of 100 MPa was applied to the right mandibular first molar. Different vertical misfit levels (50, 100, and 200 A mu m) and clip materials (plastic or gold) were evaluated. Data were evaluated using von Mises stress and microstrain. Vertical misfit amplification caused an increase in the microstrain values in the peri-implant bone tissue next to the ill-fitted component and increased the stresses in the prosthetic screws. The clip material influenced the stress and microstrain distribution in the prosthetic components and bone tissue. The levels of vertical misfit seem to be closely linked with the stress values in the prosthetic screws, mainly to that of the ill-fitted component. The gold clip presented an increase in the stress compared to the plastic clip541015151521sem informaçã
Discussing the maintenance protocols for implant-supported dental prostheses longevity: a scoping review
No full textThis scoping review aims to discuss the available hygiene protocols for home care procedures, besides methods and periodicity of professional maintenance for the implant-supported restorations, including unitary, partial and full-arch systems, even fixed or removable
Movimentação de Dentes em Prótese Total: Revisão da Literatura
No full textObjetivos: A movimentação de dentes durante o processamento daprótese é de grande importância e merece atenção tanto dos profissionaisque a confeccionam quanto dos pesquisadores para se conseguiras menores alterações dimensionais e o melhor desempenho clínicopossível. Desta maneira o objetivo do presente estudo foi revisar a literaturasobre a movimentação de dentes artificiais em próteses totais.Método: Para a realização do estudo foi utilizada uma coletânea de trabalhoscientíficos, analisados por meio de Revisão da Literatura, verificandoassim os diferentes fatores que causam a movimentação dedentes artificiais.Resultados e conclusão: A movimentação de dentes artificiais em prótesestotais é inevitável podendo diminuir de intensidade, porém nãopode ser eliminada completamente durante a confecção da prótese
Effects Of Simulated Pulpal Pressure, Mechanical And Thermocycling Challenge On The Microtensile Bond Strength Of Resin Luting Cements
No full textThis study aimed at comparing the microtensile bond strength (mu TBS) of three simplified luting strategies after different aging processes. Sixty human molars were prepared to expose flat middle dentin surfaces which received the following luting procedures: (i) SB+ARC - two-step etch-and-rinse adhesive+conventional resin cement (Adper Singlebond 2 + RelyX ARC, 3M-ESPE); (ii) S3 + PAN - one-step self-etch adhesive + conventional resin cement (Clearfil S3 + Panavia F2.0, Kuraray Medical); (iii) U200 - self-adhesive resin cement (RelyX U200,3M-ESPE). The specimens were finally restored by indirect resin composite procedures (Filtek Z100,3M-ESPE). The aging regimens were water storage at 37 degrees C for one week (control), one week of 20 cm H2O simulated pulpal pressure (SPP), 200,000 mechanical loading (ML) cycles, or 5000 thermal cycles (TC). The mu TBS data was analyzed by two-way ANOVA and Tukey's test (alpha = 0.05). SB + ARC showed significantly higher mu TBS for control and all aging processes (p < 0.001). Nevertheless, TC had no effect on the bond strength of SB+ARC. No difference in mu TBS was observed between S3 + PAN and U200 after SPP (p = 0.251), but significant lower values were found for U200 after ML (p = 0.010) besides being superior in the control groups (p < 0.001). For U200, all ageing regimens induced significant reductions in the bond strength (p < 0.001) with a more pronounced negative effect after ML S3 + PAN showed significant lower bond strength (p = 0.010) only after ML aging. Two-step etch-and-rinse adhesive associated with dual-curing conventional resin cement may present the highest overall mu TBS. However, the use of S3 one-step self-etch adhesive along with conventional resin cements may provide the most stable luting performance under the tested aging strategy. (C) 2015 Elsevier Ltd. All rights reserved.60697
