scholarly journals Preliminary Results of Implantation in Animal Model and Osteoblast Culture Evaluation of Prototypes of Biomimetic Multispiked Connecting Scaffold for Noncemented Stemless Resurfacing Hip Arthroplasty Endoprostheses

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Ryszard Uklejewski ◽  
Piotr Rogala ◽  
Mariusz Winiecki ◽  
Andrzej Kędzia ◽  
Piotr Ruszkowski
Keyword(s):  
Animal Model ◽  
Hip Arthroplasty ◽  
Fixation Method ◽  
Material Surface ◽  
Implant Loosening ◽  
New Bone Formation ◽  
Metallic Particles ◽  
Osteoblast Culture ◽  
New Type ◽  
Resurfacing Hip Arthroplasty

We present the new fixation method for RHA(resurfacing hip arthroplasty)endoprostheses by means of the biomimetic multispiked connecting scaffold (MSC-Scaffold). Such connecting scaffold can generate new type of RHA endoprostheses, that is stemless and fixed entirely without cement. The preprototypes of this MSC-Scaffold were manufactured with modern additive laser additive technology (SLM). The pilot surgical implantations in animal model (two laboratory swine) of MSC-Scaffold preprototypes have showed after two months neither implant loosening, migration, and nor other early complications. From the results of performed histopathological evaluation of the periscaffold spikes bone tissue and 10-day culture of human osteoblasts (NHOst) we can conclude that (1) the scaffolding effect was obtained and (2) to improve the osseointegration of the scaffold spikes, their material surface should be physicochemically modified (e.g., with hydroxyapatite). Some histopathological findings in the periscaffold domain near the MSC-Scaffold spikes bases (fibrous connective tissue and metallic particles near the MSC-Scaffold spikes bases edges) prompt considering the necessity to optimize the design of the MSC-Scaffold in the regions of its interspike space near the spikes bases edges, to provide more room for new bone formation in this region and for indispensable post-processing (glass pearl blasting) after the SLM manufacturing.

Selection of an animal model for resurfacing hip arthroplasty

1987 ◽  
Vol 2 (2) ◽  
pp. 111-117 ◽  
Author(s):  
T.W. Phillips ◽  
G. Johnston ◽  
Paul Wood
Keyword(s):  
Animal Model ◽  
Hip Arthroplasty ◽  
Resurfacing Hip Arthroplasty ◽  
Selection Of

scholarly journals Retention of prosthetic articulating spacer after infected hip arthroplasty as a semipermanent implant: A case report

2019 ◽  
Vol 26 (2) ◽  
pp. 105-107
Author(s):  
Michelle Hilda Luk ◽  
Fu Yuen Ng ◽  
Henry Fu ◽  
Ping Keung Chan ◽  
Chun Hoi Yan ◽  
...  
Keyword(s):  
Case Report ◽  
Total Hip Replacement ◽  
Hip Arthroplasty ◽  
Hip Replacement ◽  
Cement Spacer ◽  
Implant Loosening ◽  
Second Stage ◽  
Joint Infections ◽  
Articulating Spacer

Prosthesis with antibiotic-loaded acrylic cement was designed as a temporary articulating cement spacer in a two-stage procedure before definitive reimplantation for the treatment of periprosthetic joint infections. It is designed to remain in situ for about 6–12 weeks, until evidence of infection is controlled before reimplantation of a definitive total hip replacement. This study presents a case of a patient with prosthetic articulating spacer retention for 6 years, previously performed for an infected unipolar hemiarthroplasty for which he refused second-stage reimplantation. He remains relatively asymptomatic with no evidence of infection, implant loosening, or fracture. The patient is able to walk with a frame with minimal hip pain.

scholarly journals Finite-element analysis of the influence of tibial implant fixation design of total ankle replacement on bone–implant interfacial biomechanical performance

2020 ◽  
Vol 28 (3) ◽  
pp. 230949902096612
Author(s):  
Jian Yu ◽  
Chao Zhang ◽  
Wen-Ming Chen ◽  
Dahang Zhao ◽  
Pengfei chu ◽  
...  
Keyword(s):  
Finite Element ◽  
Total Ankle Replacement ◽  
Implant Design ◽  
Fixation Method ◽  
Implant Loosening ◽  
Implant Fixation ◽  
Bone Resection ◽  
Bone Implant ◽  
Initial Stability ◽  
Ankle Replacement

Purpose: Implant loosening in tibia after primary total ankle replacement (TAR) is one of the common postoperative problems in TAR. Innovations in implant structure design may ideally reduce micromotion at the bone–implant interface and enhance the bone-implant fixation and initial stability, thus eventually prevents long-term implant loosening. This study aimed to investigate (1) biomechanical characteristics at the bone–implant interface and (2) the influence of design features, such as radius, height, and length. Methods: A total of 101 finite-element models were created based on four commercially available implants. The models predicted micromotion at the bone–implant interface, and we investigated the impact of structural parameters, such as radius, length, and height. Results: Our results suggested that stem-type implants generally required the highest volume of bone resection before implantation, while peg-type implants required the lowest. Compared with central fixation features (stem and keel), peripherally distributed geometries (bar and peg) were associated with lower initial micromotions. The initial stability of all types of implant design can be optimized by decreasing fixation size, such as reducing the radius of the bars and pegs and lowering the height. Conclusion: Peg-type tibial implant design may be a promising fixation method, which is required with a minimum bone resection volume and yielded minimum micromotion under an extreme axial loading scenario. Present models can serve as a useful platform to build upon to help physicians or engineers when making incremental improvements related to implant design.

scholarly journals Prediction of Bone Damage Formation in Resurfacing Hip Arthroplasty

2019 ◽  
Vol 9 (1) ◽  
pp. 5879-5885
Keyword(s):  
Hip Arthroplasty ◽  
Hip Replacement ◽  
Femoral Bone ◽  
Cobalt Chromium ◽  
Element Analysis ◽  
Left Femur ◽  
Bone Model ◽  
Replacement Method ◽  
Physiological Loading ◽  
Resurfacing Hip Arthroplasty

Resurfacing Hip Arthroplasty (RHA) is a hip replacement method that is widely known nowadays. However, the complication on femoral bone fracture often happens in this hip replacement method which associated with the implant positioning. The objective of this study is to predict the damage formation on the bone which resulting from the RHA pin malposition. Finite element analysis was conducted in order to predict the damage formation on the bone model based on the computed tomography (CT) image of a patient. A 3D inhomogeneous bone model was developed from a 47 year old patient with an osteoarthritis disease located on the left femur. The material used for the RHA implant model is cobalt chromium and the implant is then being inserted into the femoral bone. Straight implant position with angle 130° was selected as a reference in the analysis while another three position of varus (> 130°) and valgus (<130°) were selected and known as the pin malposition. The simulation was conducted on each of the selected angles in order to predict the damage formation towards the bone model. The damage formation obtained was from the results of elements failure which occurred after applying the load. Physiological loading of a human which focusing on the normal walking condition was selected as the loading and boundary condition in this study. The femoral bone model experienced the highest damage formation when the implant located at the varus position while reduced significantly when the implant placed at the valgus position.

scholarly journals Resurfacing hip arthroplasty in neuromuscular hip disorders – A retrospective case series

2013 ◽  
Vol 10 (3) ◽  
pp. 105-110 ◽  
Author(s):  
Francois Tudor ◽  
Amir Ariamanesh ◽  
Anish Potty ◽  
Aresh Hashemi-Nejad
Keyword(s):  
Hip Arthroplasty ◽  
Case Series ◽  
Retrospective Case ◽  
Retrospective Case Series ◽  
Resurfacing Hip Arthroplasty

Long-Term Survival and Reason for Revision of Wagner Resurfacing Hip Arthroplasty

2010 ◽  
Vol 25 (4) ◽  
pp. 522-528 ◽  
Author(s):  
Kerry Costi ◽  
Donald W. Howie ◽  
David G. Campbell ◽  
Margaret A. McGee ◽  
Brian L. Cornish
Keyword(s):  
Hip Arthroplasty ◽  
Term Survival ◽  
Long Term Survival ◽  
Resurfacing Hip Arthroplasty

Total surface hip arthroplasty in dogs using a fiber metal composite as a fixation method

1983 ◽  
Vol 17 (4) ◽  
pp. 643-653 ◽  
Author(s):  
Helge Ronningen ◽  
Paul Lereim ◽  
Jorge Galante ◽  
William Rostoker ◽  
Thomas Turner ◽  
...  
Keyword(s):  
Hip Arthroplasty ◽  
Fixation Method ◽  
Metal Composite ◽  
Fiber Metal
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