Screw Loosening
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Implant Volume Loss, Misfit, Screw Loosening, and Stress In Custom Titanium and Zirconia Abutments
Resumo O objetivo neste estudo foi verificar o efeito da diminuição de volume do implante, desajuste vertical entre o pilar e plataforma protética, torque de afrouxamento do parafuso protético e distribuição da tensão no parafuso em pilares de titânio e zircônia. Dez pilares personalizados de cada material foram fresados e conectados aos implantes d
Braz. Dent. J.. Publicado em: 2020-08
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2. Surgical treatment of the osteoporotic spine with bone cement-injectable cannulated pedicle screw fixation: technical description and preliminary application in 43 patients
OBJECTIVES: To describe a new approach for the application of polymethylmethacrylate augmentation of bone cement-injectable cannulated pedicle screws. METHODS: Between June 2010 and February 2013, 43 patients with degenerative spinal disease and osteoporosis (T-score <-2.5) underwent lumbar fusion using cement-injectable cannulated pedicle screws. Clinical
Clinics. Publicado em: 2015-02
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3. The development and evaluation of individualized templates to assist transoral C2 articular mass or transpedicular screw placement in TARP-IV procedures: adult cadaver specimen study
OBJECTIVES: The transoral atlantoaxial reduction plate system treats irreducible atlantoaxial dislocation from transoral atlantoaxial reduction plate-I to transoral atlantoaxial reduction plate-III. However, this system has demonstrated problems associated with screw loosening, atlantoaxial fixation and concealed or manifest neurovascular injuries. This stu
Clinics. Publicado em: 2014-11
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4. Minimal invasive ostheosintesis for treatment of diaphiseal transverse humeral shaft fractures
OBJECTIVE: To evaluate patients with transverse fractures of the shaft of the humerus treated with indirect reduction and internal fixation with plate and screws through minimally invasive technique.METHODS: Inclusion criteria were adult patients with transverse diaphyseal fractures of the humerus closed, isolated or not occurring within 15 days of the initi
Acta ortop. bras.. Publicado em: 2014
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5. Screw loosening of different UCLA-type abutments after mechanical cycling
AIM: To evaluate the loss of applied torque (detorque) values in cast and pre-machined abutments for external hex abutment/implant interface of single implant-supported prostheses subjected to mechanical cycling. METHODS: Ten metal crowns were fabricated using two types of UCLA abutments: cast and pre-machined with metal base in NiCrTi alloy and tightened to
Braz. J. Oral Sci.. Publicado em: 2013-09
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6. Análise comparativa do grau de rotação de parafusos para sistema UCLA em estruturas fundidas em monobloco, soldadas com solda TIG e solda convencional / Comparative analysis of the degree of rotation of screws for UCLA system in one-piece cast structures welded with TIG and Conventional welding
Com disseminação dos implantes osseointegrados na pratica clinica a ocorrência de complicações mecânicas tornam-se comuns, causando problemas para pacientes e profissionais. O objetivo deste estudo foi comparar o grau de rotação de parafusos de titânio (grau 5), durante testes de torque, re-torque e os valores de destorque (Ncm), sobre infra-estrutu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/10/2011
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7. Análise quantitativa do corante azul de Evan extravasado do interior das câmaras internas dos implantes por suas interfaces protéticas nas condições: Hexágono Externo (HE) - Hexágono Interno (HI) - Cone Morse (CM) / Quantitative analysis of Evans blue dye leakage from internal implant chambers through their prosthetic interfaces under the following conditions: External Hexagon (HE) Internal Hexagon (IH) Morse Cone (MC)
Research and studies seek to evaluate the capacity of adaptation and sealing between the implant-intermediate connections of different dental implant systems. It has recently been observed that in implants with screw-retained abutments, various phenomena, such as screw4 loosening and fracture, rotation and fracture of the abutment with bacterial penetration
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/09/2011
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8. A rationale method for evaluating unscrewing torque values of prosthetic screws in dental implants
OBJECTIVES: Previous studies that evaluated the torque needed for removing dental implant screws have not considered the manner of transfer of the occlusal loads in clinical settings. Instead, the torque used for removal was applied directly to the screw, and most of them omitted the possibility that the hexagon could limit the action of the occlusal load in
Journal of Applied Oral Science. Publicado em: 2011-02
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9. Evaluation of screw loosening on new abutment screws and after successive tightening
O objetivo deste estudo foi avaliar a perda do torque inicial, quando usados novos parafusos de pilares e após sucessivos apertos. Quatro infra-estruturas (IE), utilizando pilares calcináveis tipo UCLA, foram fundidas em liga de cobalto-cromo, onde novos parafusos de pilares foram utilizados (G1) em um primeiro momento. Posteriormente os mesmos parafusos d
Brazilian Dental Journal. Publicado em: 2011
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10. Preload and torque removal evaluation of three different abutment screws for single standing implant restorations
Several authors still consider the mechanical problems of fracture and component loosening as the main causes of failure of implant-supported restorations. The purpose of this in vitro study was to compare the preload of three types of screw for transmucosal abutment attachment used in single implant-supported prosthesis through strain gauge and removal torq
Journal of Applied Oral Science. Publicado em: 2008-02
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11. Estudo biomecânico da conexão implante/pilar protético em implantes do sistema cone morse / Biomechanical study of the implant/abutment connection in implants with internal tapered connectios
Internal tapered connections were developed to improve biomechanical properties and to reduce mechanical problems found in external and internal hex implants. This work presents the results of two studies that investigated the biomechanical properties of the implant/abutment connection in implants with internal tapered connections. The purpose of the first s
Publicado em: 2007
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12. Análise comparativa do grau de rotação de parafusos para sistema UCLA em estruturas fundidas em monobloco provenientes de abutmentscalcináveis e com cinta de Colbato-Cromo / Comparative analysis of the rotational angle degree on UCLA burnout/Cobalt-Chromium machined collar abutment screws for one-piece cast metal frameworks
Problemática: De ocorrência clínica bastante comum, o afrouxamento dos parafusos que compõe uma prótese sobre implante é uma complicação que traz transtornos tanto para o profissional quanto para o paciente. Proposição: O objetivo deste estudo foi comparar o grau de rotação de parafusos de titânio (grau 5), durante testes de torque, re-torque e
Publicado em: 2007