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https://www.readbyqxmd.com/read/28705486/the-influence-of-adipose-tissue-location-on-postural-control
#1
Joanna Cieślińska-Świder, Mariusz Paweł Furmanek, Janusz Wiesław Błaszczyk
A growing body of evidence suggests, that excessive body weight is inseparably connected with postural instability. In none of previous studies, body weight distribution has been considered as a factor, which may affect results of a static posturography. The purpose of the present study is to quantify some center of foot pressure (COP) characteristics in 40 obese women with android type of obesity (waist-to-hip ratio - WHR≥0.85, BMI: 37.5±5.4) and 40 obese women with gynoid type of obesity (WHR<0.85, BMI: 36...
June 27, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28704747/two-cases-of-late-medial-instability-of-the-knee-due-to-hip-disease-after-total-knee-arthroplasty
#2
Masanori Tsubosaka, Tomoyuki Matsumoto, Koji Takayama, Naoki Nakano, Ryosuke Kuroda
INTRODUCTION: There are few specific reports of late medial instability after total knee arthroplasty (TKA). We described two cases of late medial instability of the knee due to hip disease with osteoarthritis or rheumatoid arthritis after TKA, which required revision TKA. PRESENTATION OF CASES: An 82-year-old woman experienced right femoral neck fracture due to a fall that required conservative treatment at age 77 years and underwent left TKA at age 80 years. A 68-year-old woman underwent left TKA at age 54 years, right TKA at age 64 years, and left THA at age 67 years...
June 29, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28694308/association-of-delay-of-urgent-or-emergency-surgery-with-mortality-and-use-of-health-care-resources-a-propensity-score-matched-observational-cohort-study
#3
Daniel I McIsaac, Karim Abdulla, Homer Yang, Sudhir Sundaresan, Paula Doering, Sandeep Green Vaswani, Kednapa Thavorn, Alan J Forster
BACKGROUND: Delay of surgery for hip fracture is associated with increased risk of morbidity and mortality, but the effects of surgical delays on mortality and resource use in the context of other emergency surgeries is poorly described. Our objective was to measure the independent association between delay of emergency surgery and in-hospital mortality, length of stay and costs. METHODS: We identified all adult patients who underwent emergency noncardiac surgery between January 2012 and October 2014 at a single tertiary care centre...
July 10, 2017: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/28692582/iatrogenic-hip-instability-treated-with-periacetabular-osteotomy
#4
Andrew J Sheean, Aaron E Barrow, Travis C Burns, Matthew R Schmitz
Hip dislocation following hip arthroscopy is a devastating complication. Previous reports of arthroscopy-related iatrogenic instability have focused on strategies aimed at restoring the stabilizing effects of the hip joint capsuloligamentous complex. Less has been written about treatment options for patients in whom deficient acetabular coverage of the femoral head is implicated in the functionally unstable hip joint. Given this relative paucity of information, an optimal treatment approach has yet to be elucidated for these patients...
July 6, 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28673601/femoroacetabular-impingement-causes-osteoarthritis-of-the-hip-by-migration-and-micro-instability-of-the-femoral-head
#5
Henk Eijer, Tom Hogervorst
Femoroacetabular impingement is the condition whereby parts of the proximal femur mechanically collide with the acetabular rim leading to adjacent and contrecoup acetabular damage. Evidence is growing that at least for cam impingement, and perhaps less so for pincer impingement, there is a relation to the development of osteoarthritis. It has been demonstrated that surgery for impingement can improve function and decrease pain. Intuitively, it would then make sense that surgical intervention would prevent further degeneration...
July 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28673119/biomechanical-differences-of-arm-swing-countermovement-jumps-on-sand-and-rigid-surface-performed-by-elite-beach-volleyball-players
#6
George Giatsis, Vassilios Panoutsakopoulos, Iraklis A Kollias
The purpose of this study was to investigate the possible arm swing effect on the biomechanical parameters of vertical counter movement jump due to differences of the compliance of the take-off surface. Fifteen elite male beach-volleyball players (26.2 ± 5.9 years; 1.87 ± 0.05 m; 83.4 ± 6.0 kg; mean ± standard deviation, respectively) performed counter movement jumps on sand and on a rigid surface with and without an arm swing. Results showed significant (p < .05) surface effects on the jump height, the ankle joint angle at the lowest height of the body center of mass and the ankle angular velocity...
July 4, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28668212/fretting-and-corrosion-damage-in-taper-adapter-sleeves-for-ceramic-heads-a-retrieval-study
#7
Daniel W MacDonald, Antonia F Chen, Gwo-Chin Lee, Gregg R Klein, Michael A Mont, Steven M Kurtz, Harold E Cates, Matthew J Kraay, Clare M Rimnac
BACKGROUND: During revision surgery with a well-fixed stem, a titanium sleeve can be used in conjunction with a ceramic head to achieve better stress distribution across the taper surface. In vitro testing suggests that corrosion is not a concern in sleeved ceramic heads; however, little is known about the in vivo fretting corrosion of the sleeves. The purpose of this study was to investigate fretting corrosion in sleeved ceramic heads in retrieved total hip arthroplasties. METHODS: Thirty-seven sleeved ceramic heads were collected during revision...
April 26, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28660436/adventure-sports-and-sexual-freedom-hip-replacement-the-tripolar-hip
#8
James W Pritchett
Certain athletic activities and lifestyles require a completely stable and very mobile hip. Total hip replacement with a natural femoral head size and two mobile-bearing surfaces (i.e., a "tripolar" prosthesis) is the most stable prosthesis. Elegant design and wear-resistant bearing surfaces are the keys to long-term implant survivorship. The hypothesis is that a ceramic-coated tripolar prosthesis using highly cross-linked polyethylene can provide full function and complete stability with low wear. This study sought to determine: (1) patient-reported outcomes, (2) functional outcomes, (3) implant survivorship and complications, and (4) postoperative sexual limitations...
June 28, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28657567/bone-scan-in-painful-knee-arthroplasty-obsolete-or-actual-examination
#9
Giuseppe Niccoli, Domenico Mercurio, Fabrizio Cortese
ptic loosening, instability and infection are the major causes of TKA failure. For many years, nuclear medicine (NM) imaging was helpful to frame a painful total joint arthroplasty. The differentiation of septic from aseptic prosthetic loosening is critical. The latest AAOS guidelines to detect periprosthetic joint infection (PJI) restrict the role of NM scintigraphy. On the other hand, several studies suggest that NM imaging plays an important role in the evaluation of patients with painful prosthesis, but its specificity in differentiating aseptic loosening from infection is low...
June 7, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28636468/do-ligamentum-teres-tears-portend-inferior-outcomes-in-patients-with-borderline-dysplasia-undergoing-hip-arthroscopic-surgery-a-match-controlled-study-with-a-minimum-2-year-follow-up
#10
Edwin O Chaharbakhshi, Itay Perets, Lyall Ashberg, Brian Mu, Christopher Lenkeit, Benjamin G Domb
BACKGROUND: Arthroscopic surgery in borderline dysplastic hips remains controversial, but the role of the ligamentum teres (LT) has not been studied in this setting. HYPOTHESIS: Borderline dysplastic patients with LT tears have worse short-term outcomes than those without LT tears. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Data were prospectively collected on patients who underwent arthroscopic surgery between February 2008 and April 2014...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28630736/abnormal-femoral-antetorsion-a-subtrochanteric-deformity
#11
Guy Waisbrod, Florian Schiebel, Martin Beck
Femoral rotational malalignment is associated with pain and functional disability and may be a contributing factor to hip impingement as well as to instability. In general, the deformity can be addressed surgically by rotational osteotomy. However, the anatomic location of the deformity is debated. The goal of the present study was to narrow down the anatomic site of deformity using the lesser trochanter (LT) as an additional landmark. One hundred and eight patients underwent computer tomography (CT)-based rotational analysis of their lower extremities...
July 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28630728/parameters-for-assessment-of-the-inferior-acetabulum-morphology-in-300-adult-hips
#12
Munif A Hatem, Luiz A M da Cunha, João C M Abdo, Hal David Martin
The inferior acetabulum (IA) has been studied as a stabilizer of the hip in flexed positions with potential implications in femoroacetabular impingement and hip instability. However, there is a paucity of studies considering the normal morphology and parameters for assessment of the IA. The purpose of this study was to define parameters to assess the IA morphology and their normal range. Specifically, the objectives were to assess: (i) the width of the anterior horn (AH) and posterior horn (PH) of the acetabulum; (ii) the inclination of the articular surface of the AH angle (AHA) and PH angle (PHA) in the axial plane; (iii) the anterior opening angle of the IA and differences between genders...
January 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28630717/arthroscopic-hip-preservation-surgery-practice-patterns-an-international-survey
#13
Kevin M Smith, Brayden J Gerrie, Patrick C McCulloch, Brian D Lewis, R Chad Mather, Geoffrey Van Thiel, Shane J Nho, Joshua D Harris
To design and conduct a survey analyzing pre-, intra- and post- hip arthroscopy practice patterns among hip arthroscopists worldwide. A 21-question, IRB-exempt, HIPAA-compliant, cross-sectional survey was conducted via email using SurveyMonkey to examine pre-operative evaluation, intra-operative techniques and post-operative management. The survey was administered internationally to 151 hip arthroscopists identified from publicly available sources. Seventy-five respondents completed the survey (151 ± 116 hip arthroscopy procedures per year; 8...
January 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/28629944/what-are-the-risk-factors-for-dislocation-in-primary-total-hip-arthroplasty-a-multicenter-case-control-study-of-128-unstable-and-438-stable-hips
#14
M H Fessy, S Putman, A Viste, R Isida, N Ramdane, A Ferreira, A Leglise, B Rubens-Duval, N Bonin, F Bonnomet, A Combes, S Boisgard, D Mainard, S Leclercq, H Migaud
INTRODUCTION: Dislocation after total hip arthroplasty (THA) is a leading reason for surgical revision. The risk factors for dislocation are controversial, particularly those related to the patient and to the surgical procedure itself. The differences in opinion on the impact of these factors stem from the fact they are often evaluated using retrospective studies or in limited patient populations. This led us to carry out a prospective case-control study on a large population to determine: 1) the risk factors for dislocation after THA, 2) the features of these dislocations, and 3) the contribution of patient-related factors and surgery-related factors...
June 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
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
#15
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/28620863/effect-of-ligamentum-teres-tear-on-the-development-of-joint-instability-and-articular-cartilage-damage-an-in-vivo-rabbit-study
#16
Jong Hun Baek, Young Soo Chun, Kee Hyung Rhyu, Wan Keun Yoon, Yoon Je Cho
The contribution of the ligamentum teres to the stabilization of the hip joint and the clinical influence of a compromised ligamentum teres are not well known. This study aimed to investigate joint stability and cartilage damage in a rabbit model by surgically inducing a complete ligamentum teres tear. Twenty adult New Zealand rabbits were used in this study. Rabbits were divided into complete ligamentum teres tear with capsulotomy (n = 9, group I) and capsulotomy only (n = 10, group II) groups. Unilateral surgery was performed on the left hip...
June 15, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28614289/mri-in-postreduction-evaluation-of-developmental-dysplasia-of-the-hip-our-experience
#17
Daniela Dibello, Luca Odoni, Federica Pederiva, Valentina Di Carlo
BACKGROUND: Developmental dysplasia of the hip (DDH) is one of the most common congenital defects in the newborn. When its severe form is not corrected, it is associated with long-term morbidity. Closed reduction with casting is the standard primary treatment and reduction is confirmed by magnetic resonance imaging (MRI). We reported our experience on the reliability of MRI in postreduction assessment of DDH. METHODS: All children who underwent closed reduction for Graf type IV DDH at our institution between September 2010 and June 2016 were retrospectively reviewed...
June 13, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28610477/lower-extremity-joint-coupling-variability-during-gait-in-young-adults-with-and-without-chronic-ankle-instability
#18
Thomas Lilley, Christopher C Herb, Joseph Hart, Jay Hertel
Chronic ankle instability (CAI) is a condition resulting from a lateral ankle sprain. Shank-rearfoot joint-coupling variability differences have been found in CAI patients; however, joint-coupling variability (VCV) of the ankle and proximal joints has not been explored. Our purpose was to analyse VCV in adults with and without CAI during gait. Four joint-coupling pairs were analysed: knee sagittal-ankle sagittal, knee sagittal-ankle frontal, hip frontal-ankle sagittal and hip frontal-ankle frontal. Twenty-seven adults participated (CAI:n = 13, Control:n = 14)...
June 13, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28606460/dual-mobility-vs-fixed-bearing-total-hip-arthroplasty-in-patients-under-55-years-of-age-a-single-institution-matched-cohort-analysis
#19
Fiachra E Rowan, Anthony J Salvatore, Jeffrey K Lange, Geoffrey H Westrich
BACKGROUND: Prosthetic dislocation of total hip arthroplasty (THA) is a common cause for revision surgery. Dual-mobility (DM) bearings were introduced to mitigate complications; however, their performance in younger patients is unknown. This study compared results of patients <55 years of age with DM vs fixed-bearing (FB) primary THA. METHODS: Our total joint registry was used to evaluate primary THA patients <55 years of age, and then, an age-matched comparative analysis was performed for 136 THAs using third-generation highly cross-linked polyethylene DM bearings and 136 THAs using FB from the same manufacturer with mean follow-up of 3...
May 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28605235/effects-of-hip-strengthening-on-neuromuscular-control-hip-strength-and-self-reported-functional-deficits-in-individuals-with-chronic-ankle-instability
#20
Brent I Smith, Carrie L Docherty, Denice Curtis
CONTEXT: Deficits in ankle and hip strength and lower extremity postural control are associated with chronic ankle instability (CAI). Following strength training, muscle groups demonstrate increased strength. This change is partially credited to improved neuromuscular control and many studies have investigated ankle protocols for subjects with CAI. The effects of isolating hip musculature in strength training protocols in this population is not well understood. OBJECTIVE: Examine the effects of hip strengthening on clinical and self-reported outcomes in patients with CAI...
June 12, 2017: Journal of Sport Rehabilitation
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