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Showing 1 to 18 of 18 for “"Cementless"”.
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Cementless Tibial Base Micromotion During Activities of Daily Living
<p>Initial stability of cementless total knee replacement (TKR) components is directly related to long-term fixation and success, as excess motion hinders bony ingrowth. To assess implant stability, there is a need for more physiologically accurate loading conditions, incorporating forces and …
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Numerical simulation of implant-bone interaction following cementless joint replacement
… remains a considerable problem. As a result, cementless implants have been developed. These components rely on the ingrowth of bone into a porous coating, which covers a portion of the component surface, to achieve the required mechanical interlock. Once mineralised bone tissue has formed …
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Validation of numerical prediction of bone ingrowth into cementless implants
… problems, and this led to the development of cementless implants. These implants depend on the ingrowth of bone into a porous coating, to produce a durable method of implant fixation which the normal bone turnover process will maintain. One of the problems with cementless implants is that the …
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Effects on Initial Fixation of Cementless Tibial Trays in Total Knee Arthroplasty
… largely effect the initial stability of the cementless tibial tray component in a total knee replacement (TKR), where increased motion at the tray-bone interface hinders bony ingrowth. With a lack of bony ingrowth, the cementless implant will not experience long-term success. Understanding …
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Primary stability in cementless total hip replacement: measurement techniques and aided-surgery
Primary stability of stems in cementless total hip replacements is recognized to play a critical role for long-term survival and thus for the success of the overall surgical procedure. In Literature, several studies addressed this important issue. Different approaches have been explored aiming to …
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Osseointegration of a Cementless Total Knee Arthroplasty in a Murine Model of Glucocorticoid Induced Osteoporosis
… In the current studies, we used an established cementless murine knee arthroplasty model to better understand how GCs impact bone regeneration, osseointegration and biomechanical strength. The mouse model used in this study consists of a laser sintered titanium beaded tibial component (2mm long, …
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A finite element analysis of the effects of bone loss on cementless total hip arthroplasty
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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The Effect of a Medial Collar on the Initial Stability of a Cementless Primary Femoral Hip Prosthesis
… broach-only, proximally porous-coated primary cementless hip prosthesis using a computational analysis. In a computer model, collared and collarless prostheses are placed into six femora from six different patients and subjected to two separate loading conditions encountered daily. The presence …
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Survival, primary stability and bone remodeling assessment of cementless sockets. An appraisal of Wolff's Law in the acetabulum
Contains fulltext : 155620.pdf (Publisher’s version ) (Open Access)
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Standzeitverkürzende Patientencharakteristika und Protheseneigenschaften von aseptisch gelockerten Hüftendoprothesen
… prostheses had a longer survival time than the cementless implants. Anatomic stems had a higher survival time than straight stems. Five stem types were closer looked at Charnley - Müller Curved Stem - SP II Lubinus, - Müller Straight Stem and ABG. Their respective survival times differ in this …
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Validation and Analysis of Model-Predicted Patellar Implant-Synthetic Bone Relative Motion in Cementless Total Knee Replacement During a Single-Leg Lunge
<p>Initial stability of cementless total knee replacement (TKR) components is crucial to establish bony ingrowth into the porous interface surface and long-term fixation, however, few cementless patellar implant micromotion tests have been developed. Previous studies were all focused on qualifying …
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The adoption of laser melting technology for the manufacture of functionally graded cobalt chrome alloy femoral stems
… stem design has been proposed for cemented or cementless fixation. Physical testing has shown that a functionally graded stem can be repeatedly manufactured using SLM, which was 48% lighter and 60% more flexible than a traditional CoCrMo prosthesis. The research presented in this thesis has …
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An analysis of choice: a case study on hip prostheses
… I identify, for example, that the use of cementless prostheses has grown rapidly, despite their performance in terms of early revision being inferior to the traditional cemented types. However, the NJR was only introduced in 2003, and cannot yet provide information on longer term …
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The role of head size in total hip arthroplasty - Dislocation, wear and cup stability
… bearings would compromise the fixation of cementless cups, compared with 32-mm heads. Using RSA, no difference in cup migration was found. The thesis concludes that the use of 32-mm heads in routine THA has provided greater stability than 28-mm heads. The use of 36-mm heads did not provide …
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Entfernung von Al2O3-Restpartikeln von der Oberfläche korundgestrahlter Titanimplantate durch die ALFREDS-Oberflächenbehandlung : Effekt auf die Biokompatibilität, Osteointegration und Scherhaftfestigkeit in-vivo
BACKGROUND. Cementless endoprosthetic devices are grit-blasted with Al2O3 particles to increase surface roughness and enhance the implants´ osseous integration. Grit blasting leads to an embedding of Al2O3 particles which subsequently cover 24% to 42% [1,2] of total surface area. Dislocated into …
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Η ΟΛΙΚΗ ΑΡΘΡΟΠΛΑΣΤΙΚΗ ΤΟΥ ΓΟΝΑΤΟΣ ΜΕ ΕΝΔΟΠΡΟΘΕΣΗ PORUS COATED ANATOMIC
WE HAVE OPERATED 25 PATIENTS (25 KNEES) WITH OSTEOARTHRITIS (19) REUMATOID ARTHRITIS (4) IDIOPATHIC OSTEONECROSES (2). WE HAVE PUT THE POROUS COATED ANATOMIC TOTAL KNEE ENDOPROSTHESES. 23 ARTHROPLASTIES HAVE BEEN DONE UNCEMENTED AND 2 CEMENTED. THE EARLY FIXATION BY TIGHT FITTING OF THE PROSTHESES …