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https://www.readbyqxmd.com/read/27925636/on-the-2d-simplification-of-3d-bone-implant-systems-application-to-a-femoral-cementless-hip-stem
#1
Fernando J Quevedo González, Michael Reimeringer, Natalia Nuño
Three-dimensional (3D) finite element (FE) models are commonly used to analyze the mechanical behavior of the bone under different conditions (i.e. before and after arthroplasty). They can provide detailed information but they are numerically expensive and this limits their use in cases where large or numerous simulations are required. On the other hand, 2D models show less computational cost but the precision of results depends on the approach used for the simplification. Two main questions arise: are the 3D results adequately represented in a 2D section of the model? Which approach should be used to build a 2D model that provides reliable results compared to the 3D model? In this paper, we first evaluate if the plane used for generating the 2D models of bone-implant systems adequately represents the results of the full 3D model...
December 7, 2016: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/27923627/outcomes-of-cementless-unicompartmental-and-total-knee-arthroplasty-a-systematic-review
#2
REVIEW
Jelle P van der List, Dana L Sheng, Laura J Kleeblad, Harshvardhan Chawla, Andrew D Pearle
BACKGROUND: Aseptic loosening is a common failure mode in cemented unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA). This led to the development of cementless designs but the historical outcomes were poor. Recent developments in cementless designs have improved outcomes, but the current status is unknown. Therefore, a systematic review was performed to assess recent outcomes of cementless knee arthroplasty. METHODS: A search was performed using PubMed, Embase and Cochrane systems and national registries for studies reporting outcomes since 2005...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27923597/long-term-results-of-cementless-total-hip-arthroplasty-with-subtrochanteric-shortening-osteotomy-in-crowe-type-iv-developmental-dysplasia
#3
Duan Wang, Ling-Li Li, Hao-Yang Wang, Fu-Xing Pei, Zong-Ke Zhou
BACKGROUND: When surgeons reconstruct hips with a high dislocation related to severe developmental dysplasia of the hip (DDH) in total hip arthroplasty (THA), archiving long-term stable implant fixation and improving patient function and satisfaction remain challenging. The purpose of this study was to evaluate the 10-year outcomes of transverse subtrochanteric shortening osteotomy in cementless, modular THA in Crowe type IV-Hartofilakidis type III DDH. METHODS: We reviewed 62 patients (76 hips) who underwent cementless THA with transverse subtrochanteric shortening osteotomy from 2002-2010...
November 15, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27923596/revision-hip-arthroplasty-using-a-modular-cementless-femoral-stem-intermediate-term-follow-up
#4
Sureshan Sivananthan, Chin-Tat Lim, Rapeepat Narkbunnam, Alex Sox-Harris, James I Huddleston, Stuart B Goodman
BACKGROUND: Modular femoral stem provides flexibility in femoral reconstruction, ensuring improved "fit and fill". However, there are risks of junction failure and corrosion, as well as cost concerns in the use of modular femoral stems. METHODS: We reviewed prospectively-gathered clinical and radiographic data on revision total hip arthroplasties (THAs) performed from 2001-2007 using modular, cementless femoral component performed by the 2 senior authors. Patients with a minimum follow-up of 7 years were included in this study...
November 2, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27920813/densitometric-evaluation-of-bone-prosthetic-counterface-in-hip-and-knee-arthroplasty-with-modern-implants
#5
Andrea Cozzi Lepri, Marco Giorgini, Carla Signorini, Christian Carulli, Roberto Civinini, Maria Luisa Brandi, Massimo Innocenti
INTRODUCTION: Recent acquisitions of the complex mechanisms of osseointegration between implants and host bone have gained attention, accordingly to the methods of evaluation of these interactions. DEXA analysis is considered an useful tool to assess such phenomena, in order to analyse in a quantitative manner the local metabolic activity of the bone, and to evaluate over the time the integration between host bone and prosthetic components. The purpose of the present study is to report about a preliminary experience in the analysis of osseointegration processes of patients undergoing a primary Total Hip Arthroplasty (THA) or a revision Total Knee Arthroplasty (rTKA)...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27919579/alumina-delta-on-alumina-delta-bearing-in-cementless-total-hip-arthroplasty-in-patients-aged-50-years
#6
Young-Hoo Kim, Jang-Won Park, Jun-Shik Kim
BACKGROUND: There are limited studies to evaluate long-term clinical and radiographic outcomes of alumina delta ceramic-on-ceramic bearings in cementless total hip arthroplasty (THA). The purpose of this study was to evaluate the clinical and radiographic results, prevalence of osteolysis, squeaking, and fracture of ceramic material associated with the use of the alumina delta ceramic-on-alumina delta ceramic bearing in cementless THA in patients aged <50 years. METHODS: We reviewed the cases of 277 patients (334 hips) who underwent a cementless THA using alumina delta ceramic-on-alumina delta ceramic when they were 50 years or younger at the time of surgery...
December 2, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27914976/cementless-lateralized-stems-in-primary-tha-mid-term-survival-and-risk-factors-for-failure-in-172-stems
#7
C Courtin, A Viste, F Subtil, O Cantin, R Desmarchelier, M H Fessy
INTRODUCTION: Increasing the femoral offset when performing total hip arthroplasty (THA) theoretically increases the stresses and risks of the stem not integrating itself into bone. But this concept has not been validated for cementless stems; this led us to conduct a retrospective study to determine: (1) risk factors for the occurrence of symptomatic femoral radiological abnormalities, (2) the incidence of these abnormal radiological findings, (3) the revision rate for aseptic non-integration of a cementless lateralized stem...
November 30, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27913129/preoperative-planning-and-operative-techniques-of-the-shorter-tapered-stem-compared-to-the-metaphyseal-fit-stem-in-cementless-total-hip-arthroplasty
#8
Hiroshi Imai, Joji Miyawaki, Tomomi Kamada, Akira Maruishi, Jun Takeba, Hiromasa Miura
BACKGROUND: In order to prevent postoperative dislocation due to prosthetic impingement as a result of total hip arthroplasty (THA), the combined anteversion (CA) theory, which combines the anteversion of the femoral stem and the acetabular socket, has been revised in recent years. Particularly, it is necessary to keep CA within the target zone. METHODS: The aim of this study was to investigate whether postoperative CA can be kept within the target zone while using the operative technique which prepares the socket first in cementless THA, by estimating the anteversion of the metaphyseal fit stem or the shorter, tapered wedge stem using preoperative 3-dimensional computerized planning, and by adjusting the anteversion of the socket using a navigation system that considers CA...
November 10, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27909119/impact-of-a-learning-curve-on-the-survivorship-of-4802-cementless-total-hip-arthroplasties
#9
P Magill, J Blaney, J C Hill, M P Bonnin, D E Beverland
AIMS: Our aim was to report survivorship data and lessons learned with the Corail/Pinnacle cementless total hip arthroplasty (THA) system. PATIENTS AND METHODS: Between August 2005 and March 2015, a total of 4802 primary cementless Corail/Pinnacle THAs were performed in 4309 patients. In March 2016, we reviewed these hips from a prospectively maintained database. RESULTS: A total of 80 hips (1.67%) have been revised which is equivalent to a cumulative risk of revision of 2...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27900304/clinical-outcome-of-design-modifications-to-the-cls-spotorno-stem-in-total-hip-replacement
#10
Angelo Graceffa, Pier Francesco Indelli, Leonardo Latella, Paolo Poli, Alexander Fulco, Massimiliano Marcucci
PURPOSE: historically, the original CLS Spotorno Stem has demonstrated excellent survival. The design of this stem was recently modified, resulting in the introduction of a shorter, modular version (CLS Brevius). The purpose of the current study was to evaluate the functional, radiological and survivorship outcomes of the cementless CLS Brevius Stem in a multi-surgeon, single center, consecutive series study at two years post-surgery. METHODS: the Authors performed 170 total hip arthroplasties in 155 patients using the shorter, triple-taper stem design (CLS Brevius)...
July 2016: Joints
https://www.readbyqxmd.com/read/27893757/assessing-the-acetabular-cup-implant-primary-stability-by-impact-analyses-a-cadaveric-study
#11
Adrien Michel, Romain Bosc, Jean-Paul Meningaud, Philippe Hernigou, Guillaume Haiat
BACKGROUND: The primary stability of the acetabular cup (AC) implant is an important determinant for the long term success of cementless hip surgery. However, it remains difficult to assess the AC implant stability due to the complex nature of the bone-implant interface. A compromise should be found when inserting the AC implant in order to obtain a sufficient implant stability without risking bone fracture. The aim of this study is to evaluate the potential of impact signals analyses to assess the primary stability of AC implants inserted in cadaveric specimens...
2016: PloS One
https://www.readbyqxmd.com/read/27890581/total-hip-arthroplasty-using-a-cementless-dual-mobility-cup-provides-increased-stability-and-favorable-gait-parameters-at-five-years-follow-up
#12
A Acker, J-F Fischer, K Aminian, E Lécureux, B M Jolles
BACKGROUND: Rates of dislocation following primary total hip arthroplasty (THA) vary from 0.5 to 10%. Dual-mobility cups in THA demonstrate increased stability. Clinical outcomes following THA with dual-mobility cups have been reported, but gait has not been assessed. Therefore we performed a retrospective case control study to answer: (1) is gait better in patients following THA with a dual-mobility cup than in frail, elderly patients of the same age? (2) Are clinical outcomes better in patients following THA with a dual-mobility cup than in frail, elderly patients? (3) What is the dislocation rate following THA with a dual-mobility cup? HYPOTHESIS: We hypothesized that patients who underwent THA with a dual-mobility cup have a better gait compared to frail, elderly patients of the same age...
November 24, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27886361/comparison-of-anatomic-vs-straight-femoral-stem-design-in-total-hip-replacement-femoral-canal-fill-in-vivo
#13
Friso A de Boer, Elhadi Sariali
INTRODUCTION: The femoral canal fill between an anatomic and a straight prosthesis design in cementless total hip arthroplasty (THA) was compared. We hypothesised that the anatomic SPS stem has higher proximal fill and lesser distal fill than the straight stem. MATERIAL AND METHODS: The femoral canal fill was measured on 3 months routine postoperative x-rays at 5 levels of the stem in 50 consecutive patients, aged 35-83 years, who underwent 56 THA procedures by a single surgeon in this hospital...
November 22, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27886358/outcomes-of-total-hip-replacement-in-limbs-affected-by-poliomyelitis
#14
Cesare Faldini, Marcello De Fine, Alberto Di Martino, Daniele Fabbri, Raffaele Borghi, Mohammadreza Chehrassan, Francesco Traina
INTRODUCTION: The outcomes of total hip replacement in patients suffering from residual poliomyelitis are poorly covered in the literature. In this retrospective study we posed the question of whether total hip replacement performed for degenerative hip diseases in limbs with residual poliomyelitis could determine satisfactory mid-term clinical and radiographic results, with a reasonable complication rate. METHODS: A retrospective study was carried out to assess the results of 14 total hip replacements performed on 14 patients with residual poliomyelitis on the involved limb from June 1999 to September 2011...
November 15, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27874909/risk-factors-for-intraoperative-proximal-femoral-fracture-during-primary-cementless-tha
#15
Ran Zhao, Hong Cai, Yanqing Liu, Hua Tian, Ke Zhang, Zhongjun Liu
Intraoperative proximal femoral fracture, one of the most common complications of total hip arthroplasty (THA), occurs more often in cementless procedures and can affect rehabilitation, hospitalization time, and cost of treatment. The goal of this study was to identify risk factors for intraoperative proximal femoral fracture in THA to identify high-risk groups preoperatively and minimize the incidence of this complication. This nested case-control study included 904 primary cementless THA procedures (769 patients) performed between January 2009 and July 2015...
November 22, 2016: Orthopedics
https://www.readbyqxmd.com/read/27855776/periprosthetic-bone-density-changes-after-minihip-tm-cementless-femoral-short-stem-one-year-results-of-dual-energy-x-ray-absorptiometry-study
#16
Ahmet Ercan, Sherif M Sokkar, Gebhard Schmid, Timm J Filler, Ashraf Abdelkafy, Joerg Jerosch
INTRODUCTION: The purpose of the current study was to investigate the reaction of the femur to the implantation of the MiniHip(TM) in terms of: (1) bone density change during one year; (2) correlations between stem length, CCD (caput-collum-diaphyseal), femoral offset, T-value, and bone density; (3) other co-variables that influence the change of bone density. PATIENTS AND METHODS: MiniHip(TM) implant was performed for 62 patients. The age range of the patients who underwent treatment was 25-78 years...
2016: SICOT-J
https://www.readbyqxmd.com/read/27849107/revision-of-a-bfx-total-hip-replacement-stem-using-a-kyon-stem-and-a-head-adaptor-in-two-dogs
#17
Luca Vezzoni, Sara Bazzo, Aldo Vezzoni
OBJECTIVE: To report revision of BFX cementless press-fit stem loosening with a Kyon cementless stem and a head adaptor in two dogs. METHODS: Total hip arthroplasty stem revision was performed in two dogs with loosening of a previously implanted Biomedtrix press-fit BFX stem. Both dogs had a well-integrated BFX cup and single stage revision was performed using a standard Kyon stem and a head adaptor in order to couple with a 17 mm head and maintain the BFX cup. RESULTS: Revisions resulted in a stable functional prosthesis with successful bone integration at the one-year postoperative re-evaluation...
November 16, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27846746/minimum-10-year-results-of-cementless-total-hip-arthroplasty-in-patients-with-rheumatoid-arthritis
#18
Akihisa Haraguchi, Yasuharu Nakashima, Hisaaki Miyahara, Yukio Esaki, Ken Okazaki, Jun-Ichi Fukushi, Go Hirata, Satoshi Ikemura, Satoshi Kamura, Koji Sakuraba, Kenjiro Fujimura, Yukio Akasaki, Hisakata Yamada
OBJECTIVES: To retrospectively evaluate the long-term results of cementless total hip arthroplasty (THA) in patients with rheumatoid arthritis (RA) and postoperative patient mortality after THA. METHODS: This study included 191 hips in 149 RA patients who underwent cementless THA between 1998 and 2005. Mean age at surgery was 54.2 years, and mean follow-up was 12.6 years. Implant and patient survivorships were determined using the Kaplan-Meier method, and the associated influencing factors were determined...
November 16, 2016: Modern Rheumatology
https://www.readbyqxmd.com/read/27832317/influence-of-single-dose-intravenous-tranexamic-acid-on-total-hip-replacement-a%C3%A2-study-on-transfusions-collateral-complications-and-readmissions
#19
A Fígar, S Mc Loughlin, P A Slullitel, W Scordo, M A Buttaro
INTRODUCTION: To determine the effects of tranexamic acid (TXA) on transfusions in patients undergoing hip replacement with a hybrid or cementless prosthesis. METHODS: A group of 172 consecutive patients aged 18 years or older who underwent elective hip replacement with uncemented or hybrid prostheses, undergoing surgery between January 2012 and January 2014 by the same primary surgeon and anesthesiologist, were retrospectively included. TXA (1 g) was administered immediately before incision in the TXA group...
November 10, 2016: Der Orthopäde
https://www.readbyqxmd.com/read/27826763/dual-mobility-cup-in-total-hip-arthroplasty-in-patients-less-than-fifty-five-years-and-over-ten-years-of-follow-up-a-prospective-and-comparative-series
#20
Jean-Marc Puch, Guy Derhi, Loys Descamps, Régis Verdier, Jacques H Caton
PURPOSE: We report clinical and radiological outcome of a dual mobility cup (DMC) of 2nd generation after a minimum of ten year-follow-up (FU). The goal of this work was to compare the results of this DMC in patients aged less than 55 years and in patients aged more than 55 years. METHODS: From 2000 to 2005, a prospective and consecutive series of 119 THAs with a cementless DMC of 2nd generation (GIROS) were performed in patients aged less than 55 years and 444 in patients aged more than 55 years...
November 8, 2016: International Orthopaedics
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