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cup alignment

Ran Schwarzkopf, Erik Schnaser, Taiki Nozaki, Yasuhito Kaneko, Michael J Gillman
INTRODUCTION: Patient-specific implants and instruments (PSI) have been used in both knee and shoulder replacements due to the perceived benefits of improved surgical accuracy and efficiency. The proposed benefits of using a PSI in total hip arthroplasty (THA) are numerous and include reduction of operative time and improved mechanical and anatomical alignment leading to increased implant longevity, increased stability, and clinical outcomes. We describe a novel patient-specific instrumentation and a surgical method that may improve directed resection of acetabular bone and accurate cup placement during THA...
October 6, 2016: Surgical Technology International
Satoru Tamura, Shunsaku Nishihara, Masaki Takao, Takashi Sakai, Hidenobu Miki, Nobuhiko Sugano
BACKGROUND: Functional anteversion and inclination of the cup change as the pelvic sagittal inclination (PSI) changes. The purposes of this study were to investigate the chronological changes of PSI during a 10-year follow-up period after total hip arthroplasty (THA) and to report the characteristics of patients who showed a greater than 10° change in the PSI from the supine to the standing position. METHODS: The subjects were 70 patients who were followed up for 10 years after THA...
September 9, 2016: Journal of Arthroplasty
Wolf Siepen, Lukas Zwicky, Karl Kilian Stoffel, Thomas Ilchmann, Martin Clauss
BACKGROUND: Cemented stems show good long-term results and the survival of new implants can be predicted by their early subsidence. With EBRA-FCA (Femoral Component Analysis using Einzel-Bild-Röntgen-Analyse) early subsidence as an early indicator for later aseptic loosening can be analysed. For the cemented TwinSys stem mid- and long-term data is only avalible from the New Zeeland Arthroplasty register, thus close monitoring of this implant system is still mandatory. METHODS: We conducted a 2 year follow up of 100 consecutive hybrid THA (Total hip arthroplasty) of a series of 285 primary THA operated between Jan 2009 und Oct 2010...
2016: BMC Musculoskeletal Disorders
George Grammatopoulos, Abtin Alvand, A Paul Monk, Stephen Mellon, Hemant Pandit, Jonathan Rees, Harinderjit S Gill, David W Murray
BACKGROUND: Wide variability in cup orientation has been reported. The aims of this study were to determine how accurate surgeons are at orientating the acetabular component and whether factors such as visual cues and the side of operating table improved accuracy. METHODS: A pelvic model was positioned in neutral alignment on an operating table and was prepared as in a posterior approach. Twenty-one surgeons (9 trainers and 12 trainees) were tasked with positioning an acetabular component in a series of target orientations...
September 7, 2016: Journal of Bone and Joint Surgery. American Volume
Shangfeng Tang, Lu Ji, Tao Hu, Ghose Bishwajit, Da Feng, Hui Ming, Yue Xian, Qian Fu, Zhifei He, Hang Fu, Ruoxi Wang, Zhanchun Feng
BACKGROUND: Public malaria health promotion is an integral part of the national malaria elimination programme, which was launched by the Chinese government in 2010. However, the public awareness of malaria needs to improve. This study aims to explore the determinants of public awareness of malaria. METHODS: A cross-sectional survey was conducted using stratified sampling method from June 2015 to March 2016. Bivariate logistic regression was performed to explore the association between predictors and malaria awareness in the sample population...
2016: Malaria Journal
Andre Oliveira Correia, Jose Antonio Marin Fernandes
The new genus Grammedessa is here proposed for 12 species: Edessa pallicornis, E. bugabensis, E. rorativentris and E. stillativentris, and eight new species: Grammedessa brunneotarsata, G. polytreta, G. flavolimbata, G. paraensis, G. braziliana, G. hypsolineata, G. multicavata and G. matogrossensis. Species belonging to this genus share four black punctured longitudinal stripes on the dorsal surface of the head; humeral angles laterally projected and slightly flattened dorso-ventrally; metasternal process with branches of anterior bifurcation narrow, long, and with acute apices; abdominal trichobothria placed laterally, not aligned with spiracles; females with gonocoxites 8 and laterotergites 8 always punctured, gonocoxites 8 large, subequal in length to laterotergites 9; males with ventral rim of pygophore deeply excavated, superior process of genital cup partially fused to the wall...
2016: Zootaxa
Kenji Kurosaka, Shigeo Fukunishi, Tomokazu Fukui, Shoji Nishio, Yuki Fujihara, Shohei Okahisa, Yu Takeda, Takashi Daimon, Shinichi Yoshiya
Implant positioning is one of the critical factors that influences postoperative outcome of total hip arthroplasty (THA). Malpositioning of the implant may lead to an increased risk of postoperative complications such as prosthetic impingement, dislocation, restricted range of motion, polyethylene wear, and loosening. In 2012, the intraoperative use of smartphone technology in THA for improved accuracy of acetabular cup placement was reported. The purpose of this study was to examine the accuracy of an iPhone/iPad-guided technique in positioning the acetabular cup in THA compared with the reference values obtained from the image-free navigation system in a cadaveric experiment...
July 1, 2016: Orthopedics
Markus Weber, Michael L Woerner, Ernst Sendtner, Florian Völlner, Joachim Grifka, Tobias F Renkawitz
BACKGROUND: In this prospective study of 66 patients undergoing cementless total hip arthroplasty through a minimally invasive anterolateral approach, we evaluated the impact of an intraoperative hybrid combined anteversion technique on postoperative range of motion (ROM). METHODS: After navigation of femoral stem anteversion, trial acetabular components were positioned manually, and their position recorded with navigation. Then, final components were implanted with navigation at the goals prescribed by the femur-first impingement detection algorithm...
April 30, 2016: Journal of Arthroplasty
Eren Cerman, Deniz Ozarslan Ozcan, Hande Celiker, Muhsin Eraslan, Ozlem Sahin, Haluk Kazokoglu
AIM: To describe the clinical characteristics and late results of patients with retinopathy of prematurity (ROP) treated with "6h cryotherapy". METHODS: Out of 1252 infants screened for ROP, 52 patients were treated with temporal 6h cryotherapy from 1997 to 2005 were recalled to our clinic. Among these 23 patients were available and 46 eyes of 23 infants were included to evaluate for visual acuity, refractive error, ocular alignment, nystagmus, retinal examination (abnormal branching of retinal vessels, retinal thinning, latis degenerations, tortuosity of vessels, straightening of temporal vessels, narrowing of the angle of vessel in the juxtapapillary entrance, pigment changes, macular heterotopia), optic atrophy and optic disc cupping, axial length at birth and axial length at 1y...
2016: International Journal of Ophthalmology
Y Ishidou, M Hirotsu, T Setoguchi, S Nagano, H Kakoi, M Yokouchi, T Yamamoto, S Komiya
PURPOSE: To compare cup-positioning accuracy in total hip arthroplasty (THA) with or without use of a Kirschner wire as a transverse-axis guide for pelvic alignment. METHODS: Records of 18 men and 73 women (mean age, 60 years) who underwent primary THA with (n=49) or without (n=42) use of a Kirschner wire as a transverse-axis guide for pelvic alignment were reviewed. A 2.4-mm Kirschner wire as a transversea-xis guide was inserted to the anterior superior iliac spine and was parallel to a line linking the left and right anterior superior iliac spine...
April 2016: Journal of Orthopaedic Surgery
Mohammed M Ahmed, Thomas J Otto, Berton R Moed
BACKGROUND: Limited-incision total hip arthroplasty (THA) preserves hip abductors, posterior capsule, and external rotators potentially diminishing dislocation risk. However, potential complications also exist, such as component malposition. Specific implants have been manufactured that enhance compatibility with this technique, while preserving metaphyseal bone; however, little data exists documenting early complications and component position. The purpose was to evaluate primary THA using a curved, bone-sparing stem inserted through the anterior approach with respect to component alignment and early complications...
2016: Journal of Orthopaedic Surgery and Research
M Katherine Hoy, Joseph D Goldman, Rhonda S Sebastian
OBJECTIVE: Estimates of fruit and vegetable (FV) consumption vary depending on intake definition, which may be determined by research purpose. Researchers have used two methods to evaluate intake: epidemiological and behavioural. The present study describes FV intake by adults using epidemiological v. behavioural approaches. DESIGN: One-day dietary intake data from What We Eat In America, National Health and Nutrition Examination Survey 2009-2012 were used. Sample weights were used to produce nationally representative estimates...
October 2016: Public Health Nutrition
Yasuhiro Homma, Tomonori Baba, Hideo Kobayashi, Asuka Desroches, Yu Ozaki, Hironori Ochi, Mikio Matsumoto, Takahito Yuasa, Kazuo Kaneko
BACKGROUND AND PURPOSE: An encouraging result with direct anterior approach (DAA) is attractive for both patients and surgeons. However, the risks associated with beginning to use DAA require further analysis of the learning curve and better countermeasures to ensure safety. We ask whether the complication rate in the DAA by the inexperienced surgeon could be decreased with specific countermeasures. Our hypothesis was that the complication rate would be low even in early phase of the learning curve using the DAA with these particular countermeasures...
March 19, 2016: International Orthopaedics
M Shahid Mansuri, Mrigya Babuta, Mohammad Sabir Ali, Ravi Bharadwaj, Gagan Deep jhingan, Samudrala Gourinath, Sudha Bhattacharya, Alok Bhattacharya
Phagocytosis plays a key role in survival and pathogenicity of Entamoeba histolytica. We have recently demonstrated that an atypical kinase EhAK1 is involved in phagocytosis in this parasite. It is recruited to the phagocytic cups through interaction with EhCaBP1. EhAK1 manipulates actin dynamics by multiple mechanisms including phosphorylation of G-actin. Biochemical analysis showed that EhAK1 is a serine/threonine kinase with broad ion specificity and undergoes multiple trans-autophosphorylation. Three autophosphorylation sites were identified by mass spectrometry...
2016: Scientific Reports
Byung-Ho Yoon, Yong-Chan Ha, Young-Kyun Lee, Woo-Lam Jo, Kyoung-Min Lee, Kyung-Hoi Koo
BACKGROUND: Transverse acetabular ligament (TAL) has been used as a landmark for aligning cup anteversion. The use of TAL as a guide is based on the assumption that TAL version is distributed within the safe zone of acetabular cup. However, there was rarely reported to compare anteversion between TAL and acetabulum using direct measurement methods. The purpose of this study was to measure the anteversion of TAL in computed tomography arthrography (CTA) and compare it with Lewinnek's safe zone and anteversion of bony acetabulum...
March 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Jens G Boldt, Jean-Claude Cartillier, Alain Machenaud, Jean-Pierre Vidalain
We present a prospective study focused on radiographic long-term outcomes and bone remodeling at a mean of 17.0 years (range: 15 to 20) in 208 cementless fully HA-coated femoral stems (Corail, DePuy International Ltd, Leeds, UK). Total hip replacements in this study were performed by three members of the surgeon design group between 1986 and 1991. Radiographic evaluation focused on periprosthetic osteolysis, bone remodeling, osseous integration, subsidence, metaphyseal or diaphyseal load transfer, and femoral stress shielding...
November 2015: Surgical Technology International
Keith R Berend, Joanne B Adams, Michael J Morris, Adolph V Lombardi
A third-generation cementless acetabular system has been designed, building on the successes of a second-generation system that featured good congruity between the liner and hemispheric shell, and proven porous plasma-sprayed coating on titanium alloy substrate, by designing a ringless barb and groove locking mechanism and optimizing range of motion. These design features are amenable to modern, highly crosslinked polyethylenes. A retrospective review was performed to assess early outcomes. A query of our practice registry revealed 534 patients (576 hips) who underwent cementless total hip arthroplasty performed by three surgeons with the G7™ Acetabular System (Biomet, Warsaw, Indiana) between April 2013 and March 2014...
November 2015: Surgical Technology International
John D Jennings, Justin Iorio, Matthew T Kleiner, John P Gaughan, Andrew M Star
The goal of this retrospective review was to determine whether fluoroscopic guidance improves acetabular cup abduction and anteversion alignment during anterior total hip arthroplasty. The authors retrospectively reviewed 199 patients (fluoroscopy group, 98; nonfluoroscopy group, 101) who underwent anterior total hip arthroplasty at a single center with and without C-arm fluoroscopy guidance. Included in the study were patients of any age who underwent primary anterior approach total hip arthroplasty performed by a single surgeon, with 6-month postoperative anteroposterior pelvis radiographs...
November 2015: Orthopedics
Yan Yang, Matthew B Zimmt
Side chains containing two diacetylene units spaced by an odd number of methylene units exhibit pronounced “bumps” composed of 0.3 nm steps, in opposite directions, at odd and even side-chain positions. In densely packed self-assembled monolayers, the bis-diacetylene bumps stack into each other, similar to the stacking of paper cups. Bis-diacetylene side chain structure and associated packing constraints can be tailored by altering the bump width, direction, side-chain location, and overall side-chain length as a means to direct the identities and alignments of adjacent molecules within monolayers...
November 17, 2015: Langmuir: the ACS Journal of Surfaces and Colloids
J Bredow, F Katinakis, K Schlüter-Brust, B Krug, D Pfau, P Eysel, J Dargel, K Wegmann
INTRODUCTION: Changes in pelvic position can influence the sagittal alignment of the lumbar spine. The restoration of hip kinematics by hip replacement thus appears to offer the possibility of correcting sagittal alignment. This preliminary retrospective study used EOS imaging to investigate the influence of total hip arthroplasty on pelvic parameters in patients with normal preoperative pelvic parameters. METHODS: Twenty patients with hip osteoarthritis undergoing total hip arthroplasty (THA) between 2011 and 2012 received unilateral THA...
2015: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
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