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Cam impingement

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https://www.readbyqxmd.com/read/29768929/current-concepts-in-revision-hip-arthroscopy
#1
Renato Locks, Ioanna Bolia, Hajime Utsunomiya, Karen Briggs, Marc J Philippon
Hip arthroscopy is an evolving procedure and its indications have expanded. The number of patients undergoing this procedure has increased significantly as well as the number of surgeons being trained. This has resulted in a notable increase in post-operative complication rates creating the need to develop advanced hip arthroscopic techniques. Revision hip arthroscopy is often complex and many factors should be considered to achieve a satisfactory clinical outcome. Careful pre-operative planning and agreement of expectations between the physician and patient regarding the procedure are important...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29701093/the-natural-alpha-angle-of-the-femoral-head-neck-junction
#2
H Gollwitzer, C Suren, C Strüwind, H Gottschling, M Schröder, L Gerdesmeyer, P M Prodinger, R Burgkart
Aims Asphericity of the femoral head-neck junction is common in cam-type femoroacetabular impingement (FAI) and usually quantified using the alpha angle on radiographs or MRI. The aim of this study was to determine the natural alpha angle in a large cohort of patients by continuous circumferential analysis with CT. Methods CT scans of 1312 femurs of 656 patients were analyzed in this cross-sectional study. There were 362 men and 294 women. Their mean age was 61.2 years (18 to 93). All scans had been performed for reasons other than hip disease...
May 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29657843/impingement-around-the-hip-beyond-cam-and-pincer
#3
Niels Hendrik Bech, Daniel Haverkamp
In this review, we bring to the attention of the reader three relatively unknown types of hip impingement. We explain the concept of low anterior inferior iliac spine (AIIS) impingement, also known as sub-spine impingement, ischio-femoral impingement (IFI) and pelvi-trochanteric impingement. For each type of impingement, we performed a search of relevant literature.We searched the PubMed, Medline (Ovid) and Embase databases from 1960 to March 2016. For each different type of impingement, a different search strategy was conducted...
February 2018: EFORT open reviews
https://www.readbyqxmd.com/read/29644385/postoperative-alpha-angle-not-associated-with-patient-centered-midterm-outcomes-following-hip-arthroscopy-for-fai
#4
Karen K Briggs, Eduardo Soares, Sanjeev Bhatia, Marc J Philippon
PURPOSE: The most commonly used parameter for defining cam-type femoroacetabular impingement(FAI) has been the alpha angle. The purpose of this study was to determine if patient-reported outcomes 5 years following hip arthroscopy for FAI were associated with postoperative alpha angle. We hypothesized that patient-reported outcomes would not be influenced by postoperative alpha angle in patients with FAI. METHODS: 230 patients had primary hip arthroscopy for FAI and chondrolabral dysfunction...
April 11, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29629574/acetabular-delamination-epidemiology-histological-features-and-treatment
#5
Eugenio Jannelli, Antonina Parafioriti, Alberto Acerbi, Alessandro Ivone, Alberto Fioruzzi, Andrea Fontana
Objective The International Cartilage Repair Society classification is the one mainly used to define chondral defects. However, this classification does not include delamination. The objective of the study is to describe the characteristics of this lesion to better explain its classification in the context of chondral lesions of the hip. Design We performed a retrospective analysis of 613 patients who underwent hip arthroscopy. In this group, the incidence, localization, histological characteristics, and association to femoroacetabular impingement as well as to other intraarticular lesions of acetabular delamination (AD) were analyzed...
April 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29607765/significant-knowledge-gaps-between-clinical-practice-and-research-on-femoroacetabular-impingement-are-we-on-the-same-path
#6
Joanne L Kemp, May Arna Risberg
Femoroacetabular impingement (FAI) is the abnormal osseous contact between the femur (cam impingement) and/or acetabular rim (pincer impingement) during end-range hip motions. This special issue on FAI aims at closing some of the gaps between clinical practice and research findings, important for all health professions treating patients with hip pain. This special issue will explore several aspects of FAI syndrome. Specifically, it will provide clinicians with a greater understanding of the etiology and prevalence of hip morphology seen in FAI syndrome, and its relationship with hip range of motion, muscle strength, and hip osteoarthritis (OA)...
April 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29575173/vascular-supply-of-the-femoral-head-in-sheep-implications-for-the-ovine-femoroacetabular-impingement-model
#7
Moritz Tannast, Nadja Wolfer, Michael K Ryan, Katja M Nuss, Brigitte von Rechenberg, Simon D Steppacher
Sheep hips have a natural non-spherical head similar to a cam-type deformity in human beings. By performing an intertrochanteric varus osteotomy, cam-type femoroacetabular impingement can be induced experimentally. In sheep, the aspherical portion is located superiorly-exactly matching the region where the superior retinacular vessels enter the femoral head-neck junction in human beings. In order to fully exploit the potential of this experimental FAI model, a safe osteochondroplasty of the superior asphericity would need to be done without the risk of avascular necrosis...
March 25, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29564291/prevalence-of-cam-deformity-with-associated-femoroacetabular-impingement-syndrome-in-hip-joint-computed-tomography-of-asymptomatic-adults
#8
Jun Han, Seok-Hyung Won, Jung-Taek Kim, Myung-Hoon Hahn, Ye-Yeon Won
Purpose: Femoroacetabular impingement (FAI) is considered an important cause of early degenerative arthritis development. Although three-dimensional (3D) imaging such as computed tomography (CT) and magnetic resonance imaging are considered precise imaging modalities for 3D morphology of FAI, they are associated with several limitations when used in out-patient clinics. The paucity of FAI morphologic data in Koreans makes it difficult to select the most effective radiographical method when screening for general orthopedic problems...
March 2018: Hip & Pelvis
https://www.readbyqxmd.com/read/29557799/alterations-in-range-of-motion-and-clinical-outcomes-after-femoroplasty-in-asians
#9
Seung Min Choi, Myung Sik Park, Bareun Chan Ju, Sun Jung Yoon
INTRODUCTION: The restoration of range of motion after surgery in patients with femoroacetabular impingement syndrome is considered an important factor that improves clinical outcomes and determines the quality of life of patients, especially in the Asian population. METHODS: Arthroscopic femoroplasty was done in 109 Asian patients with cam impingement. The patients were retrospectively evaluated using range of motion and clinical outcomes (Harris Hip Score [HHS], visual analog scale score, Hip Outcome Score-Activity of Daily Living, and Hip Outcome Score-Sports subscales) between preoperative and postoperative conditions, with a follow-up period of >2 years...
April 15, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29554551/patient-specific-parameterised-cam-geometry-in-finite-element-models-of-femoroacetabular-impingement-of-the-hip
#10
Robert J Cooper, Sophie Williams, Marlène Mengoni, Alison C Jones
BACKGROUND: Impingement resulting in soft tissue damage has been observed in hips with abnormal morphologies. Geometric parameterisation can be used to automatically generate a range of bone geometries for use in computational models, including femurs with cam deformity on the femoral neck. METHODS: This study verified patient-specific parametric finite element models of 20 patients with cam deformity (10 female, 10 male) through comparison to their patient-specific segmentation-based equivalents...
March 14, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29552506/post-cam-clunk-syndrome-after-posterior-stabilized-total-knee-arthroplasty-as-a-sign-of-early-femoral-component-loosening
#11
Akihiko Toda, Katsumasa Tei, Tomoyuki Matsumoto, Kazunari Ishida, Hiroshi Sasaki, Kazuki Kodato, Yuichiro Nishizawa, Shinsuke Kirizuki, Nao Shibanuma, Hiroomi Tateishi, Ryosuke Kuroda, Masahiro Kurosaka
Soft tissue impingements are well-known complications of total knee arthroplasty. The impingements usually occur between the medial or lateral femoral component and tibial insert, and between the patella and femoral components. We report a rare case of impingement of the soft tissue between the femoral intercondylar fossa and post of the polyethylene insert, which caused pain and walking disability. After the surgery for the arthroscopic removal of the soft tissue, the symptoms disappeared. However, prosthetic loosening of the femur occurred several months after the arthroscopic surgery, requiring revision surgery...
January 2018: Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology
https://www.readbyqxmd.com/read/29548272/is-bony-hip-morphology-associated-with-range-of-motion-and-strength-in-asymptomatic-male-soccer-players
#12
Andrea B Mosler, Rintje Agricola, Kristian Thorborg, Adam Weir, Rod J Whiteley, Kay M Crossley, Per Hӧlmich
Study Design Cross-sectional cohort study. Background Athletes with femoroacetabular impingement (FAI) syndrome have cam and/or pincer morphology, pain on orthopaedic testing, and often have reduced hip range of motion (ROM) and strength. However, cam and pincer morphology are also common in asymptomatic hips. Therefore, it is currently unknown whether the ROM and strength deficits observed in athletes with FAI syndrome result from the variance in their bony hip morphology or hip condition. Objectives To investigate the relationship between musculoskeletal screening findings and bony hip morphology in asymptomatic male soccer players...
March 16, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29548271/the-prevalence-of-cam-and-pincer-morphology-and-its-association-with-development-of-hip-osteoarthritis
#13
Pim van Klij, Joshua Heerey, Jan H Waarsing, Rintje Agricola
Synopsis Our understanding of femoroacetabular impingement (FAI) syndrome is slowly improving. The number of studies on all aspects (aetiology, prevalence, pathophysiology, natural history, treatment, and preventative measures) of FAI syndrome has grown exponentially over the past few years. This commentary provides the latest updates on the prevalence of cam and pincer hip morphology and its relationship with development of hip osteoarthritis (OA). Cam and pincer morphology is highly prevalent in the general population and in this paper is presented for different subgroups based on: age, sex, ethnicity, and athletic activity...
March 16, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29537957/beyond-the-scope-open-treatment-of-femoroacetabular-impingement
#14
Michael Ryan, Thomas Youm, Jonathan Vigdorchik
Hip arthroscopy as we know it today developed over the last 15 to 20 years, yet its true beginning is far more dated. Initially developed as a means of removing loose bodies or as a means of lavage, hip arthroscopy was not utilized to treat femoroacetabular impingement (FAI) until much later. Its usefulness as a means of treating FAI did not arise until hip impingement was understood to be causal in the development of degenerative changes of the labrum and articular surfaces. As our understanding of FAI grew, the tools for treating it developed in tandem...
March 2018: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/29526410/impingement-type-bony-morphology-was-related-to-cartilage-defects-but-not-pain-in-professional-ballet-dancers-hips
#15
Susan Mayes, Peter Smith, Jill Cook
OBJECTIVES: Professional ballet dancers may have hip bony morphology that predisposes them to cartilage or labral injury. However, the relationship between bony morphology and pathology has not been investigated in ballet. This study investigates associations between bony morphology, chondrolabral defects and hip pain in ballet dancers. DESIGN: Cross-sectional study. METHODS: 33 male and female professional ballet dancers, (mean age 27 years (range 19-39)), completed questionnaires with hip pain measured on a visual analogue scale; and underwent 3...
March 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29517923/anatomic-predictors-of-sagittal-hip-and-pelvic-motions-in-patients-with-a-cam-deformity
#16
K C Geoffrey Ng, Mario Lamontagne, Jonathan R T Jeffers, George Grammatopoulos, Paul E Beaulé
BACKGROUND: As there is a high prevalence of patients with cam deformities and no ongoing hip dysfunction, understanding the biomechanical factors predicting the onset of symptoms and degenerative changes is critical. One such variable is how the spinopelvic parameters may influence hip and pelvic sagittal mobility. Hypothesis/Purpose: Pelvic incidence may predict sagittal hip and pelvic motions during walking and squatting. The purpose was to determine which anatomic characteristics were associated with symptoms and how they influenced functional hip and pelvic ranges of motion (ROMs) during walking and squatting...
May 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29481345/morphologic-features-of-the-contralateral-femur-in-patients-with-unilateral-slipped-capital-femoral-epiphysis-resembles-mild-slip-deformity-a-matched-cohort-study
#17
Tobias Hesper, Sarah D Bixby, Daniel A Maranho, Patricia Miller, Young-Jo Kim, Eduardo N Novais
BACKGROUND: Hip osteoarthritis has been reported in the contralateral hip in patients who had been treated for unilateral slipped capital femoral epiphysis (SCFE) during adolescence. Although this might be related to the presence of a mild deformity, the morphologic features of the contralateral hip in unilateral SCFE remains poorly characterized. QUESTIONS/PURPOSES: Do measurements of (1) femoral head-neck concavity (α angle and femoral head-neck offset), (2) epiphyseal extension into the metaphysis (epiphyseal extension ratio and epiphyseal angle), and (3) posterior tilt of the epiphysis (epiphyseal tilt angle) differ between the contralateral asymptomatic hips of patients treated for unilateral SCFE and hips of an age- and sex-matched control population without a history of hip disease? METHODS: From January 2005 to May 2015, 442 patients underwent surgical treatment for SCFE at our institution...
April 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29452639/mitochondrial-mdm2-regulates-respiratory-complex-i-activity-independently-of-p53
#18
Giuseppe Arena, Madi Yann Cissé, Samuel Pyrdziak, Laurent Chatre, Romain Riscal, Maryse Fuentes, Jamie Jon Arnold, Markus Kastner, Laurie Gayte, Christelle Bertrand-Gaday, Kevin Nay, Claire Angebault-Prouteau, Kerren Murray, Beatrice Chabi, Christelle Koechlin-Ramonatxo, Béatrice Orsetti, Charles Vincent, François Casas, Jean-Christophe Marine, Sandrine Etienne-Manneville, Florence Bernex, Anne Lombès, Craig Eugene Cameron, Hervé Dubouchaud, Miria Ricchetti, Laetitia Karine Linares, Laurent Le Cam
Accumulating evidence indicates that the MDM2 oncoprotein promotes tumorigenesis beyond its canonical negative effects on the p53 tumor suppressor, but these p53-independent functions remain poorly understood. Here, we show that a fraction of endogenous MDM2 is actively imported in mitochondria to control respiration and mitochondrial dynamics independently of p53. Mitochondrial MDM2 represses the transcription of NADH-dehydrogenase 6 (MT-ND6) in vitro and in vivo, impinging on respiratory complex I activity and enhancing mitochondrial ROS production...
February 15, 2018: Molecular Cell
https://www.readbyqxmd.com/read/29441427/isolated-focal-cartilage-and-labral-defects-in-patients-with-femoroacetabular-impingement-syndrome-may-represent-new-unique-injury-patterns
#19
Ashley L Kapron, Stephen K Aoki, Jeffrey A Weiss, Aaron J Krych, Travis G Maak
PURPOSE: Develop a framework to quantify the size, location and severity of femoral and acetabular-sided cartilage and labral damage observed in patients undergoing hip arthroscopy, and generate a database of individual defect parameters to facilitate future research and treatment efforts. METHODS: The size, location, and severity of cartilage and labral damage were prospectively collected using a custom, standardized post-operative template for 100 consecutive patients with femoroacetabular impingement syndrome...
February 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29430391/modifications-to-the-hip-arthroscopy-technique-when-performing-combined-hip-arthroscopy-and-periacetabular-osteotomy
#20
Andrea M Spiker, Kate R Gumersell, Ernest L Sink, Bryan T Kelly
In the realm of hip preservation, hip arthroscopy is often used to address intra-articular impingement pathology, whereas periacetabular osteotomy (PAO) is used to address dysplasia and instability. Indications to combine these 2 procedures include hip dysplasia and symptomatic instability with a concomitant symptomatic labral tear or the other symptomatic intra-articular pathology (i.e., loose body, chondral flap). The arthroscopic portion of the procedure allows repair of the injured labrum and close inspection of the hip joint, and the PAO addresses undercoverage and/or inappropriate version of the acetabulum...
October 2017: Arthroscopy Techniques
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