An Ultra-Short Femoral Neck-Preserving Hip Prosthesis

2020 ◽  
Vol 102 (2) ◽  
pp. 128-136
Author(s):  
Janus D. Christiansen ◽  
Ashir Ejaz ◽  
Poul T. Nielsen ◽  
Mogens Laursen
Keyword(s):  
Femoral Neck ◽  
Hip Prosthesis ◽  
Femoral Neck Preserving

Clinical and radiological results after implantation of the femoral neck preserving Delfi M hip prosthesis: A case series

2012 ◽  
Vol 20 (2) ◽  
pp. 85-93 ◽  
Author(s):  
Stefan Budde ◽  
Henning Windhagen ◽  
Matthias Lerch ◽  
Maximilian Broese ◽  
Patricc Götze ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Hip Prosthesis ◽  
Case Series ◽  
Radiological Results ◽  
Femoral Neck Preserving ◽  
Clinical And Radiological Results

scholarly journals Profile of hip arthroplasty patients in a teaching hospital

2015 ◽  
Vol 42 (2) ◽  
pp. 106-110
Author(s):  
Vania Regina Goveia ◽  
Isabel Yovana Quispe Mendoza ◽  
Bráulio Roberto Gonçalves Marinho Couto ◽  
Jose Antonio Guimarães Ferreira ◽  
Edson Barreto Paiva ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Teaching Hospital ◽  
Hip Arthroplasty ◽  
Hip Prosthesis ◽  
Average Length ◽  
Standing Position ◽  
Orthopedic Procedures ◽  
Neck Fracture ◽  
Hip Arthroplasties

OBJECTIVE: to characterize the epidemiological profile of patients undergoing hip replacement, primary or revisional. METHODS: we conducted a retrospective, descriptive study, including hip arthroplasties performed from January 2009 to June 2012 in a Belo Horizonte teaching hospital, Minas Gerais State - MG, Brazil. Data were analyzed using descriptive statistics. RESULTS: orthopedic procedures represented 45% of the operations at the hospital in the period, 1.4% hip arthroplasties. There were 125 hip replacements, 85 total, 27 partial and 13 reviews. Among the patients, 40% were male and 60% were female. Age ranged between 20 and 102 years, mean and median of 73 and 76 years, respectively. The most frequent diagnosis (82%) was femoral neck fracture by low-energy trauma caused by falling form standing position. In 13 revision operations, 12 required removal of the prosthesis. The infectious complication led to revision in 54% of the time, followed by dislocation (15%), peri-prosthetic fracture (15%) and aseptic loosening (15%). The infection etiologic agent was identified in 43% of occasions. The average length of the prosthesis to a revision operation was eight months. CONCLUSION: patients undergoing hip arthroplasty are elderly, with femoral neck fracture caused by falling form standing position, affecting more women. The incidence of hip prosthesis loosening was 10%. The main cause of the infection was loosening. The incidence of revisional hip arthroplasty was 10% and the incidence of hospital mortality in patients undergoing hip arthroplasty was 7.2%.

A csípőprotézis-választás nehézségeinek és felelősségének bemutatása egy eset kapcsán

2021 ◽  
Vol 162 (20) ◽  
pp. 800-805
Author(s):  
Dragos Schiopu ◽  
F. Pieter Reynders ◽  
S. Tamás Illés
Keyword(s):  
Femoral Neck ◽  
Hip Joint ◽  
Hip Prosthesis ◽  
Psychiatric Symptoms ◽  
Indirect Evidence ◽  
Surface Replacement ◽  
Rapid Improvement ◽  
Metal On Metal ◽  
Depth Analysis ◽  
Tissue Reactions

Összefoglaló. A felszínpótló, fém a fémen csípőízületi protézisek reneszánszukat élték a 2000-es években. Elsősorban fiatal, aktív betegek esetében javasolták használni a remélt elméleti előnyök, mint a combfej csontállományának megőrzése, a csípőízület biomechanikájának fenntartása, a luxatio kockázatának csökkentése, a polietilén törmelékek és kopástermékek hiánya miatt. Bemutatunk egy beteget, akinél 19 éves korában kétszeri vesetranszplantációt követő, hosszan tartó szteroidkezelés következtében kialakult kétoldali combfejnekrózis miatt került sor felszínpótló, fém a fémen csípőprotézis beültetésére. A harmadik posztoperatív évtől mindkét csípőt érintő, fokozatosan súlyosbodó fájdalom, pszichés tünetek, valamint ismételt veseelégtelenség alakult ki. A tünetek hátterében kifejezetten magas Co-Cr szérumszintet, a csípőízület környezetében pszeudotumor-kialakulást, kiterjedt acetabularis cystákat, a combnyakak jelentős elvékonyodását találtuk, mely jobb oldalon periprotetikus combnyaktörést okozott. A revíziós műtétek során talált kiterjedt szöveti metallosis eltávolítását követően a felszínpótló protéziseket cement nélküli kerámia–kerámia totális protézisekre cseréltük. A revíziókat követően a lokális és pszichés tünetek megszűntek, a szérum Co-Cr szintje normalizálódott, ami lehetővé tette a harmadik vesetranszplantáció elvégzését is. Páciensünk csípőrevíziókat követő gyors javulása közvetett bizonyítékként szolgál a Co-Cr ionok negatív szerepére mind a helyi, mind a szisztémás szöveti reakciókban, így a transzplantált vese károsodásában. Esetünk tanulságai, hogy szervtranszplantációt követően kerülni kell a fém a fémen protézisek használatát, valamint hogy nem elég a csípőízületi protézis indikációjának felállítása és a legmodernebbnek tartott protézis használata. Különös gonddal és elmélyülten kell elemezni a beteg járulékos körülményeit, gyógyszerelését, társbetegségeit is ahhoz, hogy a legmegfelelőbb típusú protézist tudjuk kiválasztani, ami nem megkerülhető felelőssége az ortopéd sebészeknek. Orv Hetil. 2021; 162(20): 800–805. Summary. The surface replacement, metal on metal hip prostheses, experienced a renaissance in the 2000s. It has been recommended for use primarily in young, active patients due to expected theoretical benefits such as preserving femoral bone stock, maintaining hip joint biomechanics, reducing the risk of dislocation, and lacking polyethylene debris abrasion products. We present a patient who had resurfacing prosthesis because of bilateral femoral head necrosis due to long-term steroid treatment following double kidney transplantation at the age of 19. In the third postoperative year, progressive pain in both hips, psychiatric symptoms, and recurrent renal failure developed. We found extremely high serum Co-Cr levels, pseudotumor formation of the hip joint, extensive acetabular cysts, and significant thinning of the femoral neck, followed by a periprosthetic femoral neck fracture on one side. After removing the extensive tissue metallosis found during the revision surgeries, the surface replacement prostheses were replaced with cementless ceramic–ceramic total prostheses. Following the revisions, local and psychiatric symptoms resolved, and serum Co-Cr levels normalized, allowing a third kidney transplant to be performed. The rapid improvement of our patient after prosthesis revisions serves as indirect evidence for the negative role of Co-Cr ions in both local and systemic tissue reactions, including damage to the transplanted kidney. Our case report shows that the use of metal on metal prostheses after organ transplantation should be avoided and simply setting up an indication for hip prosthesis and use the most modern type of prosthesis is inadequate. Depth analysis of the patient’s ancillary conditions, medications, co-morbidities are required to select the most appropriate prosthesis type, which is an unavoidable responsibility of orthopedic surgeons. Orv Hetil. 2021; 162(20): 800–805.

INDIVIDUALLY COMPUTED FINITE ELEMENT ANALYSIS OF THE NON-STEMMED ANATOMICAL TOTAL HIP PROSTHESIS

2005 ◽  
Vol 09 (01) ◽  
pp. 21-33
Author(s):  
Poon-Ung Chieng ◽  
Ching-I Chen ◽  
Chi-Chang Lin ◽  
Ching-Lin Tsai ◽  
Po-Quang Chen
Keyword(s):  
Finite Element ◽  
Femoral Neck ◽  
Stress Analysis ◽  
Hip Prosthesis ◽  
Element Model ◽  
Main Body ◽  
Total Hip Prosthesis ◽  
Level Of Evidence ◽  
Element Analysis ◽  
Total Hip

Background: Current total hip prosthesis lack an accurate individualized finite element model to assure an accurate fit, and further require amputation of a possibly healthy femoral neck. Methods: This research presents a new methodology for performing an automated three-dimensional finite element meshing for a new type of total hip prosthesis. The stress analysis for this new design, known as Non-stemmed Anatomical Total Hip Prosthesis, is based on the methodology proposed here. The merit of this method is that the automated meshing process can be produced by using ANSYS software alone, without the need for a complicated, self-developed meshing interface program. Results: This new methodology provides a smooth boundary around the contour of the femur and the interface between the femur and the Non-stemmed Anatomical Total Hip Prosthesis, as well as avoiding additional complications. This newly designed prosthesis involves minimal modification of the intact femoral neck alignment after total hip replacement, provided that the femoral neck is still healthy. The main body of this new prosthesis is a conical-shaped mask that tightly embraces the femoral neck. The bottom skirt of this mask contacts the greater and lesser trochanter in such a way that maintains the mask in the desired position using a screw through the axis of the femoral neck. Finite element stress analysis is performed to compare the stress distribution of the intact femur and the femur after implantation of the Non-stemmed Anatomical Total Hip Prosthesis. Conclusions: Hopefully, this new prosthesis will be the method of choice for patients who have healthy femoral necks, but sick femoral heads. Further research can focus on applying this new methodology to other bone structures. Level of Evidence: Therapeutic study, Level IV.

scholarly journals Maintenance of bone mineral density after implantation of a femoral neck hip prosthesis

2008 ◽  
Vol 9 (1) ◽  
Author(s):  
Ralf Decking ◽  
Christoph Rokahr ◽  
Matthias Zurstegge ◽  
Ulrich Simon ◽  
Jens Decking
Keyword(s):  
Bone Mineral Density ◽  
Femoral Neck ◽  
Bone Mineral ◽  
Hip Prosthesis ◽  
Mineral Density

scholarly journals Measurement of the femoral neck angle in medium and large dog breeds using computed tomography

2019 ◽  
Vol 67 (1) ◽  
pp. 22-33
Author(s):  
Ahmad Al Aiyan ◽  
Kenneth Richardson ◽  
George Manchi ◽  
Johanna Plendl ◽  
Leo Brunnberg
Keyword(s):  
Computed Tomography ◽  
Femoral Neck ◽  
Hip Prosthesis ◽  
Three Dimensional ◽  
Image Data ◽  
Total Hip Prosthesis ◽  
Total Hip ◽  
Group I ◽  
Group Ii ◽  
Femoral Neck Angle

The aim of this study was to get precise normal values of the femoral neck angle (FNA) in support of developing an optimally functioning total hip prosthesis for medium and large dog breeds. Accordingly, two- and three-dimensional computed tomographic images of the anatomical structures of the proximal femora of 58, hip-dysplasia-free, mature dogs of medium and large breeds were studied. Based on the length of their femora the dogs were allocated to Group I (from 145 to 195 mm) and Group II (from 196 to 240 mm). The FNA was measured on each femur using multi-slice spiral computed tomography (CT). The two- and three-dimensional image data were processed as multi-planar and threedimensional reconstructions using Advantage Workstation software. The CT measurements revealed that Group I had an average femoral neck angle of 147.59° (min. 144.05°, max. 153.35°), while in Group II the average FNA was 147.46° (min. 141°, max. 154.35°). There was no significant correlation between the length of the femur and the FNA in either group. The optimal FNA for a total hip prosthesis is 147.5° for medium and large dog breeds.

Sign in / Sign up

Export Citation Format

Share Document