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Internal impingement

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https://www.readbyqxmd.com/read/28224071/arthroscopic-fixation-of-os-acetabuli-technique-when-to-resect-and-when-to-fix
#1
Cecilia Pascual-Garrido, John B Schrock, Justin J Mitchell, Gaston Camino Willhuber, Omer Mei-Dan, Jorge Chahla
Acetabular rim fractures, or os acetabuli, are hypothesized to occur as a result of an unfused ossification center or a stress fracture from repetitive impingement of an abnormally shaped femoral neck against the acetabular rim. When treated surgically, these fragments are typically excised as part of the correction for femoroacetabular impingement. However, in some patients, removal of these fragments can create symptoms of gross instability or microinstability of the hip. In these cases, internal fixation of the fragment is necessary...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28211284/decreased-axial-coracoid-inclination-angle-is-associated-with-rotator-cuff-tears
#2
Carlos Torrens, Eduard Alentorn-Geli, Juan Francisco Sanchez, Anna Isart, Fernando Santana
PURPOSE: Coracoid morphology has been related to coracoid impingement mainly resulting in anterior shoulder pain aggravated by forward flexion and internal rotation. However, the coracoid process morphology can also affect the inclination of the coracoacromial ligament and subsequently the subacromial space in the same way that acromial slope does. The purpose of this study was to evaluate the influence of the coracoid body-glenoid surface, coracoid tip-glenoid surface, and coracoid body-coracoid tip angles (coracoid inclination angles) on rotator cuff tears (RCTs)...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28203594/foot-progression-angle-walking-test-a-dynamic-diagnostic-assessment-for-femoroacetabular-impingement-and-hip-instability
#3
Anil S Ranawat, Michael A Gaudiani, Pablo A Slullitel, James Satalich, Brian J Rebolledo
BACKGROUND: Determining an accurate clinical diagnosis for nonarthritic hip pain may be challenging, as symptoms related to femoroacetabular impingement (FAI) or hip instability can be difficult to elucidate with current testing methods. In addition, commonly utilized physical examination maneuvers are static and do not include a dynamic or weightbearing assessment to reproduce activity-related symptoms. Therefore, implementing a dynamic assessment for FAI and hip instability could help to improve diagnostic accuracy for routine clinical examinations of patients with nonarthritic hip pain...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28197695/rotational-glenohumeral-adaptations-are-associated-with-shoulder-pathology-in-professional-male-handball-players
#4
Przemyslaw Lubiatowski, Piotr Kaczmarek, Pawel Cisowski, Ewa Breborowicz, Monika Grygorowicz, Marcin Dzianach, Tomasz Krupecki, Lior Laver, Leszek Romanowski
PURPOSE: Glenohumeral range of motion adaptations may affect throwing athletes and contribute to shoulder injury. The purpose of this study was to evaluate shoulder rotation deficits among elite professional handball players and its correlation to the presence of shoulder pain and morphological changes. METHODS: Eighty-seven elite professional handball players and 41 healthy non-athlete volunteers participated in the study. Evaluations included measurement of range of internal and external rotation, total arch of motion, identification of shoulder pain and ultrasound scan for diagnosis of rotator cuff tears and internal impingement...
February 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28194709/high-survivorship-and-little-osteoarthritis-at-10-year-followup-in-scfe-patients-treated-with-a-modified-dunn-procedure
#5
Kai Ziebarth, Milan Milosevic, Till D Lerch, Simon D Steppacher, Theddy Slongo, Klaus A Siebenrock
BACKGROUND: The modified Dunn procedure has the potential to restore the anatomy in hips with slipped capital femoral epiphyses (SCFE) while protecting the blood supply to the femoral head and minimizing secondary impingement deformities. However, there is controversy about the risks associated with the procedure and mid- to long-term data on clinical outcomes, reoperations, and complications are sparse. QUESTIONS/PURPOSES: Among patients treated with a modified Dunn procedure for SCFE, we report on (1) hip pain and function as measured by the Merle d'Aubigné and Postel score, Drehmann sign, anterior impingement test, limp, and ROM; (2) the cumulative survivorship at minimum 10-year followup with endpoints of osteoarthritis (OA) progression (at least one Tönnis grade), subsequent THA, or a Merle d'Aubigné and Postel score < 15; (3) radiographic anatomy of the proximal femur measured by slip angle, α angle, Klein line, and sphericity index; and (4) the risk of subsequent surgery and complications...
February 13, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28188359/in-vivo-analysis-of-coracoid-and-subacromial-shoulder-impingement-mechanism-during-clinical-examination
#6
Tim Leschinger, Christopher Wallraff, Dirk Müller, Matthias Hackenbroch, Henning Bovenschulte, Jan Siewe
BACKGROUND: Understanding the mechanisms of shoulder impingement created by clinical tests is crucial to accurately evaluate the condition. The objective of this study was to relate mechanisms of subacromial and coracoid impingement occurring in positions of the shoulder during clinical examination, in quantitative and qualitative terms. METHODS: A 1.0T open magnetic resonance imaging system was used in 18 female and 19 male subjects, to determine the distances between the humeral head and the acromion or coracoid, and contact with the rotator cuff (RC)...
February 11, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28162877/humeral-version-in-reverse-shoulder-arthroplasty-affects-impingement-in-activities-of-daily-living
#7
Andreas Kontaxis, Xiang Chen, Julien Berhouet, Daniel Choi, Timothy Wright, David M Dines, Russell F Warren, Lawrence V Gulotta
BACKGROUND: Impingement after reverse shoulder arthroplasty (RSA) has been correlated with implant design and surgical techniques. Previous studies suggested that humeral retroversion can reduce impingement and increase external rotation range of motion (ROM). The purpose of this study was to determine how humeral version affects impingement in activities of daily living (ADLs). MATERIALS AND METHODS: A single surgeon performed virtual RSA on 30 arthritic shoulders that were reconstructed from preoperative computed tomography scans...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28160930/editorial-commentary-the-hip-bone-s-connected-to-the-knee-bone-but-correlation-does-not-equal-causation-the-association-of-hip-motion-femoroacetabular-impingement-and-anterior-cruciate-ligament-injury
#8
EDITORIAL
Joshua D Harris
Patients with anterior cruciate ligament (ACL) injury had significantly less hip rotational motion (internal rotation [IR] and sum of IR and external rotation) than control subjects without ACL tears. For each hip IR increase of 10°, the odds of sustaining an ACL rupture decreased by a factor of 0.419. Although this investigation does not prove (causation) that loss of hip rotational motion causes an ACL tear, it does continue to complement the growing and evolving literature base showing an upstream or downstream association (correlation) of decreased hip motion on adjacent structures...
February 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28150180/pelvic-posture-and-kinematics-in-femoroacetabular-impingement-a-systematic-review
#9
REVIEW
Luca Pierannunzii
BACKGROUND: Pelvic posture and kinematics influence acetabular orientation and are therefore expected to be involved in the pathomechanics of femoroacetabular impingement (FAI). This systematic review aims to determine whether FAI patients show pelvic postures or patterns of motion contributing to impingement or, conversely, develop compensatory postures and patterns of motion preventing it. MATERIALS AND METHODS: PubMed/MEDLINE, Embase, Google Scholar and the Cochrane Library were systematically searched to find all the studies that measured pelvic positional and/or kinematic data in humans (patients or cadaveric specimens) affected by FAI...
February 1, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28124561/%C3%AE-irradiation-effects-on-the-formation-and-stability-of-camoo4-in-a-soda-lime-borosilicate-glass-ceramic-for-nuclear-waste-storage
#10
Karishma B Patel, Bruno Boizot, Sébastien P Facq, Giulio I Lampronti, Sylvain Peuget, Sophie Schuller, Ian Farnan
Molybdenum solubility is a limiting factor to actinide loading in nuclear waste glasses, as it initiates the formation of water-soluble crystalline phases such as alkali molybdates. To increase waste loading efficiency, alternative glass ceramic structures are sought that prove resistant to internal radiation resulting from radioisotope decay. In this study, selective formation of water-durable CaMoO4 in a soda lime borosilicate is achieved by introducing up to 10 mol % MoO3 in a 1:1 ratio to CaO using a sintering process...
January 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28110554/n-2-hydroxypropyltimehyl-ammonium-chloride-chitosan-nanoparticles-for-sirna-pulmonary-delivery-preparation-characterization-and-in-vitro-evaluation
#11
Suhui Ni, Yuwen Xie, Yue Tang, Yun Liu, Jing Chen, Siyan Zhu
This study developed a pH-sensitive anionic system composed of guanidinylated O-carboxymethyl chitosan (GOCMCS) and N-2-hydroxypropyltimehyl ammonium chloride chitosan (N-2-HACC) for efficient siRNA delivery to the lung following nebulization. About 16.8% of guanidine groups were incorporated into O-carboxymethyl chitosan (OCMCS) with the aid of O-methylisourea. Gel electrophoresis images demonstrated that siRNA was successfully encapsulated in nanoparticles ranging from 150 nm to 180 nm with zeta potential of about -17 mV...
January 23, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28089258/the-effect-of-scapular-position-on-subacromial-contact-behavior-a-cadaver-study
#12
Takayuki Muraki, Nobuyuki Yamamoto, John W Sperling, Scott P Steinmann, Robert H Cofield, Kai-Nan An
BACKGROUND: Patients with subacromial impingement were reported to show abnormal scapular positions during shoulder elevation. However, the relationship between the scapular positions and subacromial impingement is unclear. The purpose of this study was to biomechanically determine the effect of scapular position on subacromial contact behavior by using fresh frozen cadavers. METHODS: The peak contact pressure on the coracoacromial arch was measured with a flexible tactile force sensor in 9 fresh frozen cadaver shoulders...
January 11, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28081584/-mini-open-approach-shows-good-results-in-treatment-of-femoroacetabular-impingement
#13
Stephanie Maria Kirschbaum, Frank Sitterlee, Carsten Perka, Michael Müller
Background Femoroacetabular impingement (FAI) describes a painful, abnormal (bony) contact between the femoral neck and acetabulum, which, if left untreated, contributes to early osteoarthritis (OA) of the hip. Despite its flat learning curve and long operation times, hip arthroscopy has been used increasingly often in recent years in the surgery of femoroacetabular impingement. The mini-open technique (MOT) offers a possible alternative that addresses the abnormal morphological prominence and allows minimally invasive clearance of hip motion...
January 12, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28063762/isolated-acetabuloplasty-and-labral-repair-for-combined-type-femoroacetabular-impingement-are-we-doing-too-much
#14
Vehniah K Tjong, Mustafa M Gombera, Cynthia A Kahlenberg, Ronak M Patel, Brian Han, Prashant Deshmane, Michael A Terry
PURPOSE: To evaluate patient outcomes after isolated arthroscopic volumetric acetabular osteoplasty and labral repair for the treatment of patients with combined femoroacetabular impingement (FAI) lesions. METHODS: A review of a prospectively collected registry identified 86 patients (106 hips) with an average age of 38.1 years (range, 17-59 years) with combined-type FAI that underwent isolated acetabular osteoplasty and labral repair. Preoperative α-angle, degree of radiographic degenerative changes, and presence of a crossover sign were recorded...
January 4, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28049594/anterior-inferior-iliac-spine-morphology-and-outcomes-of-hip-arthroscopy-in-soccer-athletes-a%C3%A2-comparison-to-nonkicking-athletes
#15
Danyal H Nawabi, Ryan M Degen, Kara G Fields, Catherine S Wentzel, Olusanjo Adeoye, Bryan T Kelly
PURPOSE: To describe the anterior inferior iliac spine (AIIS) morphology and clinical outcomes following arthroscopic surgical decompression in a group of high-level soccer athletes presenting with symptomatic hip impingement when compared with a control group of nonkicking athletes. METHODS: From 2009 to 2012, we retrospectively reviewed our prospective hip registry for soccer athletes who underwent arthroscopic treatment for femoroacetabular impingement (FAI) with 2-year follow-up, comparing with a control group of nonkicking athletes...
December 31, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28040929/use-of-solid-n2-surfaces-in-metastable-particle-detection
#16
W Kedzierski, J W McConkey
A novel detector is described in which solid nitrogen at 17 K is used as the most significant element. Metastable particles impinge on this element and immediately transfer their internal energy to the solid nitrogen producing photons, via excimer formation or otherwise, whose wavelength depends on the metastable being detected and the energy transfer process. The performance of the instrument for the detection of atomic oxygen and molecular nitrogen metastables is discussed.
December 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28032029/evaluation-and-treatment-of-internal-impingement-of-the-shoulder-in-overhead-athletes
#17
REVIEW
Keith T Corpus, Christopher L Camp, David M Dines, David W Altchek, Joshua S Dines
One of the most common pathologic processes seen in overhead throwing athletes is posterior shoulder pain resulting from internal impingement. "Internal impingement" is a term used to describe a constellation of symptoms which result from the greater tuberosity of the humerus and the articular surface of the rotator cuff abutting the posterosuperior glenoid when the shoulder is in an abducted and externally rotated position. The pathophysiology in symptomatic internal impingement is multifactorial, involving physiologic shoulder remodeling, posterior capsular contracture, and scapular dyskinesis...
December 18, 2016: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28026736/-peripheral-factures-of-the-talus-mid-term-results
#18
M Peml, P Kálal, P Kopačka, M Kloub
PURPOSE OF THE STUDY Peripheral fractures of the talus (lateral talar process and posterior talar process) are rare injuries, easy to miss on examination due to their location and clinical manifestation. They account for 0.3% to 1.0% of all fractures of the talus. An incorrect or late treatment of talar process fractures can result in permanent pain, impingement syndrome, healing in malposition, pseudoarthrosis development and also, due to joint instability, in a potential development of severe subtalar arthritis...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28013332/early-experience-with-dual-mobility-acetabular-systems-featuring-highly-cross-linked-polyethylene-liners-for-primary-hip-arthroplasty-in-patients-under-fifty-five-years-of-age-an-international-multi-centre-preliminary-study
#19
Jean-Alain Epinette, Steven F Harwin, Fiachra E Rowan, Philippe Tracol, Michael A Mont, Morad Chughtai, Geoffrey H Westrich
PURPOSE: To evaluate early performance of contemporary dual mobility acetabular systems with second generation annealed highly cross-linked polyethylene for primary hip arthroplasty of patients under 55 years of age. METHODS: A prospective observational five years study across five centers in Europe and the USA of 321 patients with a mean age of 48.1 years was performed. Patients were assessed for causes of revision, hip instability, intra-prosthetic dissociation, Harris hip score and radiological signs of osteolysis...
December 24, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27997049/advances-in-ecological-genomics-in-forest-trees-and-applications-to-genetic-resources-conservation-and-breeding
#20
Jason A Holliday, Sally N Aitken, Janice E K Cooke, Bruno Fady, Santiago C González-Martínez, Myriam Heuertz, Juan-Pablo Jaramillo-Correa, Christian Lexer, Margaret Staton, Ross W Whetten, Christophe Plomion
Forest trees are an unparalleled group of organisms in their combined ecological, economic and societal importance. With widespread distributions, predominantly random mating systems and large population sizes, most tree species harbour extensive genetic variation both within and among populations. At the same time, demographic processes associated with Pleistocene climate oscillations and land-use change have affected contemporary range-wide diversity and may impinge on the potential for future adaptation...
December 20, 2016: Molecular Ecology
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