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Safe zone total hip

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https://www.readbyqxmd.com/read/29048695/evaluation-of-late-redislocation-in-patients-who-underwent-open-reduction-and-pelvic-osteotomy-as-treament-for-developmental-dysplasia-of-the-hip
#1
Ümit Tuhanioğlu, Hakan Cicek, Hasan U Ogur, Firat Seyfettinoglu, Ahmet Kapukaya
INTRODUCTION: The goal in the treatment of developmental dysplasia of the hip (DDH) is to achieve a stable and concentric reduction and to create a congruent relationship between the femoral head and the acetabulum. This study discusses the causes of loss of reduction in DDH patients who had a concentrically reduced hip at the time of removal of the hip spica cast and cessation of brace use and who later appeared with hip redislocation after mobilisation and ambulation. In addition, the possible interventions in such cases are also discussed...
October 16, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28971085/radiographic-evaluation-of-cementation-technique-using-polished-conical-triple-tapered-femoral-stem-in-hip-arthroplasty
#2
Ademir Antônio Schuroff, Mark Deeke, Marco Antônio Pedroni, Fernando Silva Lupselo, Rodrigo Ernesto Kunz, Alexandre Matos Lima
OBJECTIVE: To radiographically evaluate the quality of cementation and implantation technique using a polished, triple-tapered femoral stem in total hip arthroplasty (THA). METHOD: Retrospective study with radiographic evaluation of 86 hips in 83 patients who underwent to primary THA with the triple-tapered cemented femoral stem C-Stem (DePuy Orthopedics, Warsaw, Indiana). Cases with at least one-year of follow-up were included, and data related to preoperative, immediate postoperative, and late postoperative radiographic evolution were recorded...
2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28939031/the-current-knowledge-on-spinopelvic-mobility
#3
REVIEW
Zachary C Lum, John G Coury, Jonathan L Cohen, Lawrence D Dorr
Recent studies may suggest that our conventional knowledge of risk factors for dislocation may need rethinking. Previous studies have demonstrated a large majority of total hip arthroplasty instability with acetabular cups implanted in safe zones. Recently discovered spinopelvic motion is a coordinated biomechanical relationship among acetabular anteversion, pelvic tilt, and lumbar lordosis. Classification includes normal, hypermobile, stiff, stuck standing, stuck sitting, and fused. Normal spinopelvic motion from standing to sitting occurs with hip flexion, posterior sacral tilt, and decreased lumbar lordosis to accommodate a flexed femur and prevent impingement and dislocation...
August 24, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28933329/-mid-term-to-long-term-results-of-revision-total-hip-arthroplasty-using-the-oval-shaped-acetabular-cup-tc-type
#4
E Šťastný, T Trč, J Frýdl, Z Kopečný, T Philippou, J Lisý
INTRODUCTION The purpose of our paper is to evaluate the mid-term to long-term results and to confirm the basic criteria of a high-quality revision implant: safe bridging of bone defects, achievement of reliable primary fixation of revision acetabular cup, achievement of good secondary stability with documentable osteointegration of cup and demonstration of remodelling of transplanted bone tissue in the area of defects and in spaces between the implant ribs. MATERIAL AND METHODS Altogether 36 patients (38 cups) were evaluated who had undergone revision hip arthroplasty in the period from 2004 to 2010...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28782077/a-retrospective-study-on-the-relationship-between-altered-native-acetabular-angle-and-vertical-implant-malpositioning
#5
Jorge Rojas, Maria Bautista, Guillermo Bonilla, Omar Amado, Elina Huerfano, Daniel Monsalvo, Adolfo Llinás, José Navas
PURPOSE: Acetabular cup positioning in extreme angles of vertical position affects both stability and long-term survivorship of total hip arthroplasty. The purpose of this study is to determine whether native Sharp's angle is associated with an increased abduction angle of the acetabular component. METHODS: Consecutive patients who underwent primary total hip replacement between February 2012 and August 2015 were included. Vertical positioning of acetabular implant in the antero-posterior post-operative radiographs were measured...
August 7, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28731487/intraoperative-fluoroscopy-with-a-direct-anterior-approach-reduces-variation-in-acetabular-cup-abduction-angle
#6
Gens P Goodman, Nitin Goyal, Nancy L Parks, Robert H Hopper, William G Hamilton
INTRODUCTION: The purpose of this study was to compare acetabular cup position for 2 cohorts of total hip arthroplasty (THA) patients who had a direct anterior approach. METHODS: 100 THA cases were performed with an anterior approach using intraoperative fluoroscopy (IF) to aid in cup positioning. Another group of 100 cases underwent THA with an anterior approach without the use of any fluoroscopy. Postoperative abduction and anteversion angles were measured using Martell's hip analysis software...
July 19, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28697862/acetabular-and-femoral-anteversions-in-standing-position-are-outside-the-proposed-safe-zone-after-total-hip-arthroplasty
#7
Jean Y Lazennec, Frederic Thauront, Christopher B Robbins, Aidin E Pour
BACKGROUND: Although most hip dislocations occur in either standing or sitting position, the safe zone for implant position is defined for the supine position. Our goal was to determine preoperative and postoperative pelvis and hip orientations and whether the safe zone defined in supine position can be used to assess standing radiographs. METHODS: Preoperative and postoperative three-dimensional EOS images were assessed in 66 total hip arthroplasty patients. None of the patients had dislocation within the follow-up period (12-36 months)...
November 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28641967/fluoroscopically-guided-acetabular-component-positioning-does-it-reduce-the-risk-of-malpositioning-in-obese-patients
#8
Raul G Gosthe, Juan C Suarez, Colin A McNamara, Cecilia Calvo, Preetesh D Patel
BACKGROUND: Obesity has been described as an independent risk factor for acetabular component malpositioning. The purpose of this study was to determine if this could be overcome by use of fluoroscopic navigation in total hip arthroplasty (THA). METHODS: The first, postoperative, standing, anteroposterior pelvis radiographs from 1599 consecutive patients who underwent fluoroscopic-guided THAs via anterior approach during a six-year period were obtained. We retrospectively reviewed this prospectively collected data...
May 5, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28629942/can-a-target-zone-safer-than-lewinnek-s-safe-zone-be-defined-to-prevent-instability-of-total-hip-arthroplasties-case-control-study-of-56-dislocated-tha-and-93-matched-controls
#9
N Reina, S Putman, R Desmarchelier, E Sari Ali, P Chiron, M Ollivier, J Y Jenny, D Waast, C Mabit, E de Thomasson, C Schwartz, P Oger, L E Gayet, H Migaud, N Ramdane, M H Fessy
BACKGROUND: Various factors contribute to instability of total hip arthroplasty (THA), with implant orientation being a major contributor. We performed a case-control study with computed tomography (CT) data to determine whether: 1) orientation contributes to THA instability and 2) a safer target zone for stability than Lewinnek's classic safe zone can be defined. MATERIAL AND METHODS: We included prospectively 363 cases of THA dislocation that occurred during the calendar 2013 year in 24 participating hospitals...
June 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28625687/can-surgeons-reduce-the-risk-for-dislocation-after-primary-total-hip-arthroplasty-performed-using-the-posterolateral-approach
#10
Kurt G Seagrave, Anders Troelsen, Bjørn G Madsen, Henrik Husted, Thomas Kallemose, Kirill Gromov
BACKGROUND: Hip dislocation is one of the most common postoperative complications after total hip arthroplasty (THA). Potential contributors include patient- and surgical-related factors. We performed a retrospective cohort study to identify risk factors for postoperative dislocation in patients receiving THA via the posterolateral approach. METHODS: We assessed 1326 consecutive primary THAs performed between 2010 and 2015. Patient information was documented, and plain radiographic films were used to evaluate cup positioning, hip offset, and hip length change...
May 4, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28623889/surgical-accuracy-function-and-quality-of-life-of-simultaneous-versus-staged-bilateral-total-hip-arthroplasty-in-patients-with-osteonecrosis-of-the-femoral-head
#11
Seung-Chan Kim, Young-Wook Lim, Woo-Lam Jo, Dong-Chul Park, Jin-Woo Lee, Won-Woo Kang, Yong-Sik Kim
BACKGROUND: The optimal surgical option for patients requiring bilateral hip replacement remains controversial. The purpose of this study was to compare surgical accuracy; functional outcome and health-related quality of life; and prosthetic-related complications and revision surgery of a simultaneous bilateral total hip arthroplasty (THA) with those of a staged bilateral THA with an interval between procedures <12 months. METHODS: A total of 123 unselected consecutive patients (mean age, 43...
June 17, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28574117/combined-anteversion-technique-in-total-hip-arthroplasty-for-crowe-iv-developmental-dysplasia-of-the-hip
#12
Biao Zhu, Changzheng Su, Yeteng He, Xingyu Chai, Zhen Li, Zhenyang Hou, Tengteng Lou, Xinfeng Yan
BACKGROUND: A high rate of postoperative dislocation in total hip arthroplasty (THA) for Crowe IV developmental dysplasia of the hip (DDH) has been reported, 1 of the main reasons being higher true acetabular anteversion. If the cup is fixed with normal anteversion, the anterior rim will be excessively exposed, which reduces the contact areas of the cup and bone, affects prosthesis stability, and leads to iliopsoas tendinitis and persistent hip pain after THA. The aim of this study was to demonstrate that when cup anteversion is larger, adjusting femoral anteversion to bring the combined anteversion (CA) into the "safe zone" might prevent dislocation...
May 27, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28567577/does-the-surgical-approach-influence-the-implant-alignment-in-total-hip-arthroplasty-comparative-study-between-the-direct-anterior-and-the-anterolateral-approaches-in-the-supine-position
#13
Yuya Kawarai, Satoshi Iida, Junichi Nakamura, Yoshiyuki Shinada, Chiho Suzuki, Seiji Ohtori
PURPOSE: The purpose of this study was to clarify the difference in implant alignment between the direct anterior approach (DAA) and the anterolateral approach in the supine position (ALS). METHODS: A retrospective comparative study consisted of 215 consecutive primary total hip arthroplasties using tapered polished and straight cemented-stems via two different minimally invasive approaches (DAA group in 106 hips and ALS group in 109 hips). RESULTS: The cup radiographic anteversion angle was significantly lower in the ALS group than in the DAA group (12...
December 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28559196/quantifying-pelvic-motion-during-total-hip-arthroplasty-using-a-new-surgical-navigation-device
#14
Ran Schwarzkopf, Jeffrey M Muir, Wayne G Paprosky, Scott Seymour, Michael B Cross, Jonathan M Vigdorchik
BACKGROUND: Accurate cup positioning is one of the most challenging aspects of total hip arthroplasty (THA). Undetected movement of the patient during THA surgery can lead to inaccuracies in cup anteversion and inclination, increasing the potential for dislocation and revision surgery. Investigations into the magnitude of patient motion during THA are not well represented in the literature. METHODS: We analyzed intraoperative pelvic motion using a novel navigation device used to assist surgeons with cup position, leg length, and offset during THA...
May 4, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28542504/level-of-surgical-experience-is-associated-with-change-in-hip-center-of-rotation-following-cementless-total-hip-arthroplasty-a-radiographic-assessment
#15
Seung-Chan Kim, Young-Wook Lim, Soon-Yong Kwon, Woo-Lam Jo, Sung-Hun Ju, Chan-Joo Park, Choong-Woo Lee, Yong-Sik Kim
OBJECTIVES: After total hip arthroplasty (THA), restoration of hip center of rotation (COR) is essential to ensure stability of the prosthetic hip and longevity of the prosthesis. Our aim was to determine whether, and how, the COR changed postoperatively compared to the native COR following implantation of a cementless acetabular component in anatomical position and to compare the accuracy of cup placement between two surgeons with different levels of surgical experience. MATERIALS AND METHODS: We evaluated 145 patients (145 hips) who underwent unilateral primary THA, who had no distorted acetabulum on the affected hip and a normal contralateral hip...
2017: PloS One
https://www.readbyqxmd.com/read/28537647/robotic-assisted-total-hip-arthroplasty-outcomes-at-minimum-two-year-follow-up
#16
Richard L Illgen, Brandon R Bukowski, Rasheed Abiola, Paul Anderson, Morad Chughtai, Anton Khlopas, Michael A Mont
BACKGROUND: Component malposition in total hip arthroplasty (THA) contributes to instability and early failure. Robotic-assisted total hip arthroplasty (rTHA) utilizes CT-based planning with haptically-guided bone preparation and implant insertion to optimize component position accuracy. This study compared acetabular component position and postoperative complications following manual THA (mTHA) with rTHA. MATERIALS AND METHODS: Consecutive primary THAs performed by one surgeon at three intervals were analyzed in this retrospective cohort study: the initial 100 consecutive manual THAs (mTHA) in clinical practice (year 2000), the last consecutive 100 mTHA before rTHA introduction (year 2011), and the first consecutive 100 rTHA (year 2012)...
May 24, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28506299/developmental-hip-dysplasia-treated-by-total-hip-arthroplasty-using-a-cementless-wagner-cone-stem-in-young-adult-patients-with-a-small-physique
#17
Ping Zhen, Jun Liu, Hao Lu, Hui Chen, Xusheng Li, Shenghu Zhou
BACKGROUND: Developmental hip dysplasia (DDH) may lead to severe acetabular and femoral abnormalities that can render total hip arthroplasty (THA) challenging, especially in DDH patients with a small physique. Most conventional cemented or cementless femoral components are often difficult to implant in the narrow femoral canal and require slight version correction during surgery. The aim of this study was to present the mid-term results of THA in the treatment of DDH patients with a small physique using a cementless Wagner cone prosthesis (Zimmer®, US)...
May 15, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28499624/acetabular-placement-accuracy-with-the-direct-anterior-approach-freehand-technique
#18
Melissa C Soderquist, Ryan Scully, Anthony S Unger
BACKGROUND: Acetabular cup placement in total hip arthroplasty (THA) has been recognized as an important factor in operative success, and accurate cup placement has been the impetus for novel medical technologies. METHODS: This article examines the cup placement in 955 THAs using a freehand Direct Anterior Approach on a standard operating table. Acetabular anteversion and inclination were determined using the circle theorem. Measurements were divided into safe zone placement determined by Callanan et al as 5°-25° for anteversion and 30°-45° for inclination, as well as by Lewinnek et al as 5°-25° for anteversion and 30°-50° for inclination...
April 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28385170/danish-survey-of-acetabular-component-positioning-practice-during-primary-total-hip-arthroplasty
#19
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
#20
REVIEW
C Rivière, J-Y Lazennec, C Van Der Straeten, E Auvinet, J Cobb, S Muirhead-Allwood
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: is there any evidence of a relationship between articular impingement/dislocation risk in primary THR and (1) certain sagittal pelvic kinematics patterns, (2) pelvic incidence, and (3) types of SHRs? A systematic review of the existing literature utilising PubMed and Google search engines was performed in January 2017...
June 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
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