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Cam deformity

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https://www.readbyqxmd.com/read/27903592/alpha-angle-measurements-in-healthy-adult-volunteers-vary-depending-on-the-mri-plane-acquisition-used
#1
Mohammad Golfam, Luigia A Di Primio, Paul E Beaulé, Kalesha Hack, Mark E Schweitzer
BACKGROUND: It has been shown that cam deformities are located at a more anterosuperior location than was previously described. PURPOSE: To establish, in a large group of asymptomatic participants, the normative range of the alpha angle in the anterosuperior location in both the oblique axial and radial views of magnetic resonance imaging (MRI). STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: In 197 asymptomatic participants (394 asymptomatic hips) with a mean age of 29...
November 9, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27868335/the-elongator-complex-associated-protein-drl1-plays-a-positive-role-in-immune-responses-against-necrotrophic-fungal-pathogens-in-arabidopsis
#2
Chenggang Wang, Xudong Zhang, Jian-Liang Li, Yanping Zhang, Zhonglin Mou
DEFORMED ROOT AND LEAVES1 (DRL1) is an Arabidopsis homologue of the yeast TOXIN TARGET4 (TOT4)/KILLER TOXIN-INSENSITIVE12 (KTI12) protein that is physically associated with the RNA polymerase II interacting protein complex named Elongator. Mutations in DRL1 and Elongator lead to similar morphological and molecular phenotypes, suggesting that DRL1 and Elongator may functionally overlap in Arabidopsis. We have previously shown that Elongator plays an important role in both salicylic acid (SA)- and jasmonic acid (JA)/ethylene (ET)-mediated defense responses...
November 21, 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27815008/the-distribution-of-impingement-region-in-cam-type-femoroacetabular-impingement-and-borderline-dysplasia-of-the-hip-with-or-without-cam-deformity-a-computer-simulation-study
#3
Naomi Kobayashi, Yutaka Inaba, So Kubota, So Nakamura, Taro Tezuka, Yohei Yukizawa, Hyonmin Choe, Tomoyuki Saito
PURPOSE: To identify the distribution of the impingement region in cam-type femoroacetabular impingement (FAI) or patients with borderline developmental dysplasia of the hip (DDH) using computer simulation analysis. METHODS: A total of 51 painful hip joints from 42 consecutive cases diagnosed as cam-type FAI (center edge [CE] angle ≥ 25°, alpha angle ≥ 55°) or borderline DDH (CE angle ≥ 20° and < 25°) with or without a cam deformity (alpha angle ≥ 55° or < 55°) were enrolled...
November 1, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27785672/corr-insights-%C3%A2-increased-hip-stresses-resulting-from-a-cam-deformity-and-decreased-femoral-neck-shaft-angle-during-level-walking
#4
Andrew E Anderson
No abstract text is available yet for this article.
October 26, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27769722/the-use-of-patient-specific-implants-in-orthognathic-surgery-a-series-of-32-maxillary-osteotomy-patients
#5
Juho Suojanen, Junnu Leikola, Patricia Stoor
The use of virtual surgery, patient-specific saw and drill guides, and custom-made osteosynthesis plates is rapidly spreading from deformity surgery to orthognathic surgery. Most of the commercially available systems are using computer-aided design/computer-aided manufacture (CAD/CAM) wafers to produce patient-specific saw guides. However, most plate systems provided are still the conventional "in stock" mini plates that can be individually designed by pre-bending according to the stereolithographic model of the patient...
September 23, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27752989/femoral-morphology-in-the-dysplastic-hip-three-dimensional-characterizations-with-ct
#6
Joel Wells, Jeffrey J Nepple, Karla Crook, James R Ross, Asheesh Bedi, Perry Schoenecker, John C Clohisy
BACKGROUND: Hip dysplasia represents a spectrum of complex deformities on both sides of the joint. Although many studies have described the acetabular side of the deformity, to our knowledge, little is known about the three-dimensional (3-D) head and neck offset differences of the femora of dysplastic hips. A thorough knowledge of proximal femoral anatomy is important to prevent potential impingement and improve results after acetabular reorientation. QUESTIONS/PURPOSES: (1) Are there common proximal femoral characteristics in patients with symptomatic hip dysplasia undergoing periacetabular osteotomy (PAO)? (2) Where is the location of maximal femoral head and neck offset deformity in hip dysplasia? (3) Do certain subgroups of dysplastic hips more commonly have cam-type femoral morphology? (4) Is there a relationship between hip ROM as well as impingement testing and 3-D head and neck offset deformity? METHODS: Using our hip preservation database, 153 hips (148 patients) underwent PAO from October 2013 to July 2015...
October 17, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27720511/prevalence-of-pincer-cam-and-combined-deformities-in-japanese-hip-joints-evaluated-with-the-japanese-hip-society-diagnostic-guideline-for-femoroacetabular-impingement-a-ct-based-study
#7
Tomohiro Mimura, Kanji Mori, Shin Itakura, Yuki Furuya, Taku Kawasaki, Shinji Imai
BACKGROUND: Femoroacetabular impingement (FAI) is thought to be associated with hip osteoarthritis. We investigated the prevalences of radiologic deformities of the pincer, cam, and their combinations in Japanese hip joints using computed tomography (CT) according to the Japanese Hip Society diagnostic guideline for FAI. METHODS: Multi-slice CT images were evaluated. Pincer deformities were defined as: type 1: center-edge angle (CE) ≥40°; type 2: CE ≥ 30° and acetabular roof obliquity ≤0°; type 3: CE ≥ 25° and retroverted acetabulum...
October 6, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27696746/cam-deformity-and-acetabular-dysplasia-as-risk-factors-for-hip-osteoarthritis
#8
Fatemeh Saberi Hosnijeh, Maria E Zuiderwijk, Mathijs Versteeg, Hieronymus T W Smeele, Albert Hofman, André G Uitterlinden, Rintje Agricola, Edwin H G Oei, Jan H Waarsing, Sita M Bierma-Zeinstra, Joyce B J van Meurs
OBJECTIVE: Cam deformity and acetabular dysplasia have been recognized as relevant risk factors for hip osteoarthritis (OA) in a few prospective studies with limited sample sizes. To date, however, no evidence is available from prospective studies regarding whether the magnitude of these associations differs according to sex, body mass index (BMI), and age. METHODS: Participants in the Rotterdam Study cohort including men and women ages 55 years or older without OA at baseline (n = 4,438) and a mean follow-up of 9...
October 1, 2016: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/27667555/effect-of-geometry-on-deformation-of-anterior-implant-supported-zirconia-frameworks-an-in-vitro-study-using-digital-image-correlation
#9
Nuno Calha, Ana Messias, Fernando Guerra, Beatriz Martinho, Maria Augusta Neto, Pedro Nicolau
PURPOSE: To evaluate the effect of geometry on the displacement and the strain distribution of anterior implant-supported zirconia frameworks under static load using the 3D digital image correlation method. METHODS: Two groups (n=5) of 4-unit zirconia frameworks were produced by CAD/CAM for the implant-abutment assembly. Group 1 comprised five straight configuration frameworks and group 2 consisted of five curved configuration frameworks. Specimens were cemented and submitted to static load up to 200N...
September 22, 2016: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/27635595/editorial-cam-deformity-and-acetabular-dysplasia-as-risk-factors-for-hip-osteoarthritis
#10
Young-Jo Kim
No abstract text is available yet for this article.
September 16, 2016: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/27590644/what-are-the-results-of-surgical-treatment-of-hip-dysplasia-with-concomitant-cam-deformity
#11
Jens Goronzy, Lea Franken, Albrecht Hartmann, Falk Thielemann, Anne Postler, Tobias Paulus, Klaus-Peter Günther
BACKGROUND: Periacetabular osteotomy (PAO) is a reliable procedure to correct the deficient acetabular coverage in hips with developmental dysplasia. It is unclear how the presence of additional femoral cam-type deformity might influence the clinical and radiographic treatment results of PAO. QUESTIONS/PURPOSES: (1) Are there differences in clinical scores (WOMAC, EQ-5D) and examination findings (impingement sign) or radiographic measures of acetabular orientation and head sphericity after PAO for isolated acetabular dysplasia when compared with the combined pathology of dysplasia and additional femoral cam deformity? (2) Are these clinical and radiographic findings after combined surgical therapy for additional cam deformity influenced by different pathology-adjusted surgical techniques? METHODS: From July 2005 to December 2010, 86 patients (106 hips) underwent PAO for hip dysplasia...
September 2, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27587515/ct-based-morphological-assessment-of-the-hip-joint-in-japanese-patients-association-with-radiographic-predictors-of-femoroacetabular-impingement
#12
K Mineta, T Goto, K Wada, Y Tamaki, D Hamada, I Tonogai, K Higashino, K Sairyo
AIMS: Femoroacetabular impingement (FAI) has been highlighted and well documented primarily in Western countries and there are few large studies focused on FAI-related morphological assessment in Asian patients. We chose to investigate this subject. PATIENTS AND METHODS: We assessed the morphology of the hip and the prevalence of radiographic FAI in Japanese patients by measuring predictors of FAI. We reviewed a total of 1178 hips in 695 men and 483 women with a mean age of 58...
September 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27587132/the-cell-stretcher-a-novel-device-for-the-mechanical-stimulation-of-cell-populations
#13
S Seriani, G Del Favero, J Mahaffey, D Marko, P Gallina, C S Long, L Mestroni, O Sbaizero
Mechanical stimulation appears to be a critical modulator for many aspects of biology, both of living tissue and cells. The cell-stretcher, a novel device for the mechanical uniaxial stimulation of populations of cells, is described. The system is based on a variable stroke cam-lever-tappet mechanism which allows the delivery of cyclic stimuli with frequencies of up to 10 Hz and deformation between 1% and 20%. The kinematics is presented and a simulation of the dynamics of the system is shown, in order to compute the contact forces in the mechanism...
August 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27580734/increased-hip-stresses-resulting-from-a-cam-deformity-and-decreased-femoral-neck-shaft-angle-during-level-walking
#14
K C Geoffrey Ng, Giulia Mantovani, Mario Lamontagne, Michel R Labrosse, Paul E Beaulé
BACKGROUND: It is still unclear why many individuals with a cam morphology of the hip do not experience pain. It was recently reported that a decreased femoral neck-shaft angle may also be associated with hip symptoms. However, the effects that different femoral neck-shaft angles have on hip stresses in symptomatic and asymptomatic individuals with cam morphology remain unclear. QUESTIONS/PURPOSES: We examined the effects of the cam morphology and femoral neck-shaft angle on hip stresses during walking by asking: (1) Are there differences in hip stress characteristics among symptomatic patients with cam morphology, asymptomatic individuals with cam morphology, and individuals without cam morphology? (2) What are the effects of high and low femoral neck-shaft angles on hip stresses? METHODS: Six participants were selected, from a larger cohort, and their cam morphology and femoral neck-shaft angle parameters were measured from CT data...
August 31, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27578045/cam-deformity-and-the-omega-angle-a-novel-quantitative-measurement-of-femoral-head-neck-morphology-a-3d-ct-gender-analysis-in-asymptomatic-subjects
#15
Vasco V Mascarenhas, Paulo Rego, Pedro Dantas, Augusto Gaspar, Francisco Soldado, José G Consciência
OBJECTIVE: Our objectives were to use 3D computed tomography (CT) to define head-neck morphologic gender-specific and normative parameters in asymptomatic individuals and use the omega angle (Ω°) to provide quantification data on the location and radial extension of a cam deformity. METHODS: We prospectively included 350 individuals and evaluated 188 asymptomatic hips that underwent semiautomated CT analysis. Different thresholds of alpha angle (α°) were considered in order to analyze cam morphology and determine Ω°...
August 30, 2016: European Radiology
https://www.readbyqxmd.com/read/27514941/adolescent-femoroacetabular-impingement-gender-differences-in-hip-morphology
#16
Perry Hooper, Sameer R Oak, T Sean Lynch, Gehan Ibrahim, Ryan Goodwin, James Rosneck
PURPOSE: To compare the hip morphology of adolescent male patients and female patients who underwent hip arthroscopy for femoroacetabular impingement (FAI) and determine if gender differences exist. METHODS: We retrospectively reviewed the records of 177 adolescents, aged 13 to 18 years, who were treated for FAI with hip arthroscopy. We examined and analyzed preoperative magnetic resonance imaging (MRI) scans and plain radiographs, measuring the lateral center-edge angle, Tönnis angle, and alpha angle...
August 8, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27506970/t1%C3%AF-hip-cartilage-mapping-in-assessing-patients-with-cam-morphology-how-can-we-optimize-the-regions-of-interest
#17
Helen Anwander, Kawan S Rakhra, Gerd Melkus, Paul E Beaulé
BACKGROUND: T1ρ MRI has been shown feasible to detect the biochemical status of hip cartilage, but various region-of-interest strategies have been used, compromising the reproducibility and comparability between different institutions and studies. QUESTIONS/PURPOSES: The purposes of this study were (1) to determine representative regions of interest (ROIs) for cartilage T1ρ mapping in hips with a cam deformity; and (2) to assess intra- and interobserver reliability for cartilage T1ρ mapping in hips with a cam deformity...
August 9, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27506809/arthroscopic-treatment-of-global-pincer-type-femoroacetabular-impingement
#18
Thomas L Sanders, Patrick Reardon, Bruce A Levy, Aaron J Krych
PURPOSE: Few studies have evaluated the role of hip arthroscopy in patients with coxa profunda. The purposes of this study are to (1) report functional hip outcomes after arthroscopic treatment of patients with femoroacetabular impingement (FAI) associated with radiographic coxa profunda and (2) evaluate factors associated with poor hip function at minimum 2 years following surgery in this specific cohort. METHODS: This retrospective review included patients with radiographic sign of coxa profunda who underwent hip arthroscopy to treat FAI...
August 9, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27492971/ethnic-differences-in-bony-hip-morphology-in-a-cohort-of-445-professional-male-soccer-players
#19
Andrea B Mosler, Kay M Crossley, Jan H Waarsing, Nabil Jomaah, Adam Weir, Per Hölmich, Rintje Agricola
BACKGROUND: Participation in high-impact athletic activities has recently been associated with a higher prevalence of cam deformity. Bony hip morphology has also emerged as an important factor in the development of hip osteoarthritis. However, it is unknown whether bony morphology differs between ethnicities in athletes participating in high-impact sports. PURPOSE: To investigate whether the prevalence of specific bony hip morphological abnormalities differed between professional male soccer players of diverse ethnic backgrounds...
August 4, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27466223/analysis-of-the-current-indications-for-microfracture-of-chondral-lesions-in-the-hip-joint
#20
Darrin J Trask, James S Keene
BACKGROUND: Data on the efficacy of microfracture for treatment of chondral defects in the hip are currently limited, and the recommended criteria for its use (minimal osteoarthritis; a focal, contained lesion <4 cm(2) in size) have been taken from those that were established for the knee. PURPOSE: To determine if the current microfracture (ie, knee) criteria are appropriate for chondral lesions in the hip. STUDY DESIGN: Case series; Level of evidence, 4...
December 2016: American Journal of Sports Medicine
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