نتایج جستجو برای: implant geometry
تعداد نتایج: 190677 فیلتر نتایج به سال:
Statement o f p rob l em . Despite their mobility differences under occlusal loads, a natural tooth and an implant are often used together to support fixed prostheses. In some situations, tooth/implant-supported partial prostheses include cantilever extensions, especially in the posterior region where the bone is inadequate for placement of an additional implant. Purpose . In this study, engine...
The human knee implant is computationally modelled in the mixed lubrication regime to investigate tribological performance of implant. This model includes complex geometry components, unlike elliptical contact models that approximate this geometry. Film thickness and pressure results are presented for an ISO gait cycle determine present within during its operation. It was found it possible span...
Implant design refers to the three-dimensional structure of the implant, with all the elements and characteristics that compose it. Dental implants are subjected to various force magnitudes and directions during function. Because implants function to transfer occlusal loads to the surrounding biologic tissues, functional design objectives should aim to manage biomechanical loads to optimize the...
The present study evaluates the effects of occlusal loading on an implant-supported dental implant with external hexagon implant-abutment systems, using finite element method analysis. Tensile analyses were performed to simulate different axial and obliquous masticatory loads. influence variations in contouring conditions interfaces was analyzed weigh osseointegration linear non-linear cases, b...
Mechanical regulation of localized and appositional bone formation around bone-interfacing implants.
The local mechanical environment around bone-interfacing implants determines, in large part, whether bone formation leading to functional osseointegration will occur. Previous attempts to relate local peri-implant tissue strains to tissue formation have not accounted for implant surface geometry, which has been shown to influence early tissue healing in vivo. Furthermore, the process by which m...
BACKGROUND A fundamental pre-requisite for the clinical success in dental implant surgery is the fast and stable implant osseointegration. The press-fit phenomenon occurring at implant insertion induces biomechanical effects in the bone tissues, which ensure implant primary stability. In the field of dental surgery, the understanding of the key factors governing the osseointegration process sti...
BACKGROUND Articular geometry of knee implant has a competing impact on kinematics and contact mechanics of total knee arthroplasty (TKA) such that geometry with lower contact pressure will impose more constraints on knee kinematics. The geometric parameters that may cause this competing effect have not been well understood. This study aimed to quantify the underlying relationships between impl...
BACKGROUND The attainment of a good primary stability is a necessary condition to ensure the success of osseointegration in implantology. In type IV cancellous bone, however, it is possible that a reduced primary stability can lead to an increased rate of failure. The aim of this study was therefore to determine, with the help of the resonance frequency (Osstell mentor), which technique of impl...
Implant success is achieved by the synergistic combination of numerous biomechanical factors. This report examines the mechanical aspect of implants. In particular, it is focused on macrodesign such as thread shape, pitch, width and depth, and crestal module of implants. This study reviews the literature regarding the effect of implant thread geometry on primary stability and osseointegration u...
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