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https://www.readbyqxmd.com/read/28385170/danish-survey-of-acetabular-component-positioning-practice-during-primary-total-hip-arthroplasty
#1
Dana Cotong, Anders Troelsen, Henrik Husted, Kirill Gromov
INTRODUCTION: The Lewinnek and Callanan "safe zones" have been widely used to minimise the dislocation fre-quency in total hip arthroplasty (THA), but recent studies have questioned the association between "safe zones" and lower dislocation rates. The purpose of this study was to investigate: 1) if hip surgeons agree on a specific "safe zone" for cup positioning and 2) surgeons' surgical practice patterns regarding recurring instability in primary THA. METHODS: A survey was performed among hip surgeons during the 2015 Annual Meeting of the Danish Orthopaedic Society...
April 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28373138/the-influence-of-spine-hip-relations-on-total-hip-replacement-a-systematic-review
#2
REVIEW
Charles Rivière, Jean-Yves Lazennec, Catherine Van Der Straeten, Edouard Auvinet, Justin Cobb, Sarah Muirhead-Allwood
BACKGROUD: Sagittal pelvic kinematics along with spino-pelvic angular parameters have recently been studied by numerous investigators for their effect on Total Hip Replacement (THR) clinical outcomes, but many issue of spine hip relations (SHR) are currently unexplored. Therefore, our review aims at clarifying the following questions: 1) Is there any evidence of a relationship between articular impingement/dislocation risk in primary THR, 2) and certain sagittal pelvic kinematics patterns, 3) pelvic incidence, and 4) types of SHRs? METHODS: A systematic review of the existing literature utilising PubMed and Google search engines was performed in January 2017...
March 31, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28371783/monocular-vision-and-imu-based-system-for-prosthesis-pose-estimation-during-total-hip-replacement-surgery
#3
Shaojie Su, Yixin Zhou, Zhihua Wang, Hong Chen
The average age of population increases worldwide, so does the number of total hip replacement surgeries. Total hip replacement, however, often involves a risk of dislocation and prosthetic impingement. To minimize the risk after surgery, we propose an instrumented hip prosthesis that estimates the relative pose between prostheses intraoperatively and ensures the placement of prostheses within a safe zone. We create a model of the hip prosthesis as a ball and socket joint, which has four degrees of freedom (DOFs), including 3-DOF rotation and 1-DOF translation...
March 30, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28286463/range-of-movement-for-impingement-and-dislocation-avoidance-in-total-hip-replacement-predicted-by-finite-element-model
#4
Laura Ezquerra, María Paz Quilez, María Ángeles Pérez, Jorge Albareda, Belén Seral
Dislocation is a serious complication in total hip replacement (THR). An inadequate range of movement (ROM) can lead to impingement of the prosthesis neck on the acetabular cup; furthermore, the initiation of subluxation and dislocation may occur. The objective of this study was to generate a parametric three-dimensional finite element (FE) model capable of predicting the dislocation stability for various positions of the prosthetic head, neck, and cup under various activities. Three femoral head sizes (28, 32, and 36 mm) were simulated...
2017: Journal of Medical and Biological Engineering
https://www.readbyqxmd.com/read/28218372/chronological-changes-in-functional-cup-position-at-10-years-after-total-hip-arthroplasty
#5
Yusuke Okanoue, Masahiko Ikeuchi, Shogo Takaya, Masashi Izumi, Koji Aso, Teruhiko Kawakami
PURPOSE: This study aims to clarify the chronological changes in functional cup position at a minimum follow-up of 10 years after total hip arthroplasty (THA), and to identify the risk factors influencing a significant difference in functional cup position during the postoperative follow-up period. METHODS: We evaluated the chronological changes in functional cup position at a minimum follow-up of 10 years after THA in 58 patients with unilateral hip osteoarthritis...
February 15, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28165597/increase-in-safe-zone-area-of-the-acetabular-cup-using-dual-mobility-cups-in-tha
#6
Takaaki Ohmori, Tamon Kabata, Toru Maeda, Yoshitomo Kajino, Tadashi Taga, Kazuhiro Hasegawa, Daisuke Inoue, Takashi Yamamoto, Tomoharu Takagi, Hiroyuki Tsuchiya
BACKGROUND: Dual mobility cup (DMC) inserts reduce the risk of dislocation after total hip arthroplasty (THA). No available research has clearly delineated stability advantages of DMC inserts in primary and revision THA. We investigated: (i) the degree of change in the safe zone of the cup when a DMC insert is used compared to a fixed insert; (ii) the method of selecting candidates for a DMC insert without changing the position of the acetabular (cup) component during revision THA in frequent dislocation cases caused by implant impingement...
January 30, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28153459/total-hip-arthroplasty-in-the-spinal-deformity-population-does-degree-of-sagittal-deformity-affect-rates-of-safe-zone-placement-instability-or-revision
#7
Edward M DelSole, Jonathan M Vigdorchik, Ran Schwarzkopf, Thomas J Errico, Aaron J Buckland
BACKGROUND: Changes in spinal alignment and pelvic tilt alter acetabular orientation in predictable ways, which may have implications on stability of total hip arthroplasty (THA). Patients with sagittal spinal deformity represent a subset of patients who may be at particularly high risk of THA instability because of postural compensation for abnormal spinal alignment. METHODS: Using standing stereoradiography, we evaluated the spinopelvic parameters, acetabular cup anteversion, and inclination of 139 THAs in 107 patients with sagittal spinal deformity...
December 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28139342/revision-total-hip-arthroplasty-using-imageless-navigation-with-the-concept-of-combined-anteversion
#8
Jun-Dong Chang, In-Sung Kim, Sharad Prabhakar, Sameer A Mansukhani, Sang-Soo Lee, Je-Hyun Yoo
BACKGROUND: The purpose of the study was to evaluate the implant positions and clinical results of revision total hip arthroplasty (THA) using an imageless navigation with the concept of combined anteversion. METHODS: A total of 40 cementless revision THAs (24 men and 16 women) using an imageless navigation with the concept of combined anteversion were retrospectively evaluated. The concept of combined anteversion was applied in cup positioning based on Widmer's equation (cup anteversion + 0...
December 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28137262/direct-anterior-approach-for-total-hip-arthroplasty-with-a-novel-mobile-traction-table-a-prospective-cohort-study
#9
Junichi Nakamura, Shigeo Hagiwara, Sumihisa Orita, Ryuichiro Akagi, Takane Suzuki, Masahiko Suzuki, Kazuhisa Takahashi, Seiji Ohtori
BACKGROUND: The purpose of this prospective cohort study was to clarify the safety and efficacy of total hip arthroplasty via the direct anterior approach in the supine position with a novel mobile traction table. METHODS: The first experience of consecutive surgeries by a single surgeon using the direct anterior approach with a traction table is described with a two-year follow-up period. Of 121 patients, 100 patients without previous hip surgeries, severe deformity, or cemented implants were divided into two groups comprising the first 50 patients and the second 50 patients...
January 31, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28097253/practical-implications-of-the-lumbar-spine-and-its-function-on-total-hip-arthroplasty
#10
EDITORIAL
Vincent Vinh Gia An, Brahman Shankar Sivakumar, Yadin David Levy, Jim Pierrepont, Warwick James Bruce
Correct component placement is of significant importance to ensure optimal outcomes in total hip arthroplasty (THA). Traditionally, the Lewinnek plane has been referenced as an adequate "safe zone", formed between the anterior superior iliac spines and public tubercles to optimize acetabular orientation. However, recent evidence shows that the positioning of this plane may vary due to the biomechanical relationship between the lumbar spine and hip. Therefore, the plane acquired intraoperatively may not accurately recreate the actual functional plane and acetabular orientation encountered outside of the intraoperative environment...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28053386/early-clinical-and-radiological-results-of-minimally-invasive-total-hip-replacement
#11
Özgür Karakoyun, Mehmet Fatih Erol, Ahmet Aslan, Mesut Karıksız, Burak Günaydın
INTRODUCTION: It is critical to achieve both proper component positioning and intact muscle balance if satisfactory results are to be attained after total hip replacement (THR). There have been fewer studies on minimally invasive (MI) THR than standard approaches. The objective of this paper is to present the early clinical and radiological results of posterolateral MI THR. MATERIALS AND METHODS: The retrospective analysis of the records of patients undergoing posterolateral MI THR surgery between 2011 and 2014 was the basis of this study...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/27960222/factors-predisposing-to-dislocation-after-primary-total-hip-arthroplasty-a-multivariate-analysis-of-risk-factors-at-7-to-10-years-follow-up
#12
Michele Francesco Surace, Luca Monestier, Fabio D'Angelo, Andrea Bertagnon
BACKGROUND: Dislocation of primary THA (total hip arthroplasty) is one of the most undesirable complications with an incidence ranging from 2% to 5%. Several risk factors are described, related to the patient, surgery, or prosthetic design. The aim of the study was to assess risk factors and their potential influence on dislocation. MATERIALS AND METHODS: 387 primary THA were performed between September 2005 to December 2008 at our institute (Varese, Italy) through a modified posterior-lateral approach...
December 13, 2016: Surgical Technology International
https://www.readbyqxmd.com/read/27879150/acetabular-cup-position-and-risk-of-dislocation-in-primary-total-hip-arthroplasty
#13
REVIEW
Kurt G Seagrave, Anders Troelsen, Henrik Malchau, Henrik Husted, Kirill Gromov
Background and purpose - Hip dislocation is one of the most common complications following total hip arthroplasty (THA). Several factors that affect dislocation have been identified, including acetabular cup positioning. Optimal values for cup inclination and anteversion are debatable. We performed a systematic review to describe the different methods for measuring cup placement, target zones for cup positioning, and the association between cup positioning and dislocation following primary THA. Methods - A systematic search of literature in the PubMed database was performed (January and February 2016) to identify articles that compared acetabular cup positioning and the risk of dislocation...
February 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/27703417/higher-acetabular-anteversion-in-direct-anterior-total-hip-arthroplasty-a-retrospective-case-control-study
#14
Antonia F Chen, Chi-Lung Chen, Sara Low, Wei-Ming Lin, Karthikeyan Chinnakkannu, Fabio R Orozco, Alvin C Ong, Zachary D Post
BACKGROUND: Surgical approach is known as a risk factor that influences cup malposition while performing total hip arthroplasty (THA). However, no study has been conducted comparing cup positioning between the supine direct anterior (DA) and supine direct lateral (DL) THA approaches. QUESTIONS/PURPOSES: (1) Is there a difference in acetabular cup positioning between supine DA and supine DL THA approaches? (2) Are there differences in complications based on acetabular cup positioning between the two approaches? METHODS: From 2012 to 2014, 186 patients who underwent primary THAs using DA approach were matched with 186 patients using DL approach by body mass index, age, and gender...
October 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/27667535/total-hip-arthroplasty-after-periacetabular-and-intertrochanteric-valgus-osteotomy
#15
Yusuke Osawa, Yukiharu Hasegawa, Toshiaki Okura, Daigo Morita, Naoki Ishiguro
BACKGROUND: We performed periacetabular osteotomy (PAO) combined with intertrochanteric valgus osteotomy (TVO) to obtain better congruity for patients with acetabular dysplasia and nonspherical femoral head. These patients with PAO-combined TVO demonstrate long-term progression of osteoarthritis, thereby, needing conversion to total hip arthroplasty (THA) and is difficult due to morphological changes. The objective of the present study was to investigate outcomes of patients who underwent THA after PAO-combined TVO...
March 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27633947/acetabular-component-position-and-the-risk-of-dislocation-following-primary-and-revision-total-hip-arthroplasty-a-matched-cohort-analysis
#16
Anita Sadhu, Denis Nam, Benjamin R Coobs, Toby N Barrack, Ryan M Nunley, Robert L Barrack
BACKGROUND: Recently, the importance of acetabular component positioning in the Lewinnek "safe zone" in preventing prosthetic dislocation following total hip arthroplasty (THA) has been questioned. The purpose of this study was to determine the proportion of acetabular components within the Lewinnek safe zone between primary and revision THAs that have sustained a dislocation vs matched controls without a dislocation event. METHODS: This was a retrospective, institutional review board-approved investigation of THAs performed at our institution or referred to our institution between 1997 and 2013...
March 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27631091/efficacy-and-safety-of-once-yearly-zoledronic-acid-in-japanese-patients-with-primary-osteoporosis-two-year-results-from-a-randomized-placebo-controlled-double-blind-study-zoledronate-treatment-in-efficacy-to-osteoporosis-zone-study
#17
T Nakamura, M Fukunaga, T Nakano, H Kishimoto, M Ito, H Hagino, T Sone, A Taguchi, S Tanaka, M Ohashi, Y Ota, M Shiraki
In a 2-year randomized, placebo-controlled study of 665 Japanese patients with primary osteoporosis, once-yearly administration of zoledronic acid (5 mg) reduced the risk of new morphometric vertebral fractures. INTRODUCTION: The purpose of this study was to determine the efficacy and safety of once-yearly intravenous infusion of ZOL in Japanese patients with primary osteoporosis. METHODS: This was a two-year multicenter, randomized, placebo-controlled, double-blind, parallel-group comparative study (ZONE Study)...
January 2017: Osteoporosis International
https://www.readbyqxmd.com/read/27536625/a-liner-breakage-in-total-hip-arthroplasty-after-using-1st-generation-highly-cross-linked-polyethylene-mated-against-36-mm-metal-head-a-case-report
#18
Won-Kee Choi, Myung-Rae Cho, Seung-Bum Chae, Dong-Young Kim
It has been known the highly cross linked polyethylene (HXLPE) has an advantage of improved wear rate. However, the alteration in mechanical properties such as decreased tensile yield and fatigue strength make concerns about fragility of HXLPE. We experienced a case of HXLPE breakage. But, this case of liner breakage happened although patient belonged to normal BMI and proper acetabular cup position so called "safe zone" on radiographs. So, we report this case with reference review.
September 2015: Hip & Pelvis
https://www.readbyqxmd.com/read/27499519/adoption-of-robotic-vs-fluoroscopic-guidance-in-total-hip-arthroplasty-is-acetabular-positioning-improved-in-the-learning-curve
#19
Eli Kamara, Jonathon Robinson, Marcel A Bas, Jose A Rodriguez, Matthew S Hepinstall
BACKGROUND: Acetabulum positioning affects dislocation rates, component impingement, bearing surface wear rates, and need for revision surgery. Novel techniques purport to improve the accuracy and precision of acetabular component position, but may have a significant learning curve. Our aim was to assess whether adopting robotic or fluoroscopic techniques improve acetabulum positioning compared to manual total hip arthroplasty (THA) during the learning curve. METHODS: Three types of THAs were compared in this retrospective cohort: (1) the first 100 fluoroscopically guided direct anterior THAs (fluoroscopic anterior [FA]) done by a surgeon learning the anterior approach, (2) the first 100 robotic-assisted posterior THAs done by a surgeon learning robotic-assisted surgery (robotic posterior [RP]), and (3) the last 100 manual posterior (MP) THAs done by each surgeon (200 THAs) before adoption of novel techniques...
January 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27337666/radiographic-evaluation-of-hip-dislocations-necessitating-revision-total-hip-arthroplasty
#20
Julio J Jauregui, Samik Banerjee, Randa K Elmallah, Todd P Pierce, Jeffrey J Cherian, Steven F Harwin, Michael A Mont
Although prosthetic hip dislocation is a common reason for revision arthroplasty, few studies have comprehensively evaluated the radiographic factors that may lead to the need for revision. Therefore, the authors radiographically evaluated all prosthetic hip dislocations that were treated at one institution. They then specifically assessed those that required revision surgery. The authors found that the prosthetic center of rotation (pCOR) was located superolateral and inferolateral to the native COR (nCOR) in all patients...
September 1, 2016: Orthopedics
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