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Os acetabuli

Adrián Cuéllar, Xabier Albillos, Asier Cuéllar, Ricardo Cuéllar
An os acetabuli (OA) increases the contact area and surface area of the acetabulum and is important to maintain congruity of the hip joint. Thus preservation of this ossicle is important to prevent loss of contact area and ensure containment of the femoral head. We describe an all-arthroscopic approach to the fixation of OA with a compression screw. Initially, the fibrous tissue is debrided between the acetabular rim and the OA, a guidewire is placed through the OA up to the acetabular rim, and a screw is inserted over the wire...
June 2017: Arthroscopy Techniques
Luis Pérez Carro, Andre Sa Rodrigues, Alexander Ortiz Castillo, Sarthak Patnaik, Manuel Sumillera Garcia, Ana Alfonso Fernandez, Ana Garcia Clemente
The os acetabuli is thought to arise from unfused secondary ossification centers or as rim fractures in the setting of dysplastic hips or hips with femoroacetabular impingement. Resection of a large os acetabuli can lead to structural instability of the joint, and in these cases, osteoplasty of the impingement, reduction and internal fixation of the osseous fragment, and labral repair have been described in the literature. Anchor fixation for labral repair in the surrounding zone of the osteosynthesis might bring some technical problems...
February 2017: Arthroscopy Techniques
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
Desai Pingal, Timothy Marqueen, Karanvir Prakash
Apophyseal injuries of the pelvis have increased recently with increased participation of teenagers in contact sports. Apophyseal fractures of the pelvis should be ruled out from apophysitis, os acetabuli and bony tumors. We report a case of fracture of anterior-inferior iliac spine following indirect injury to the hip in a young football player. The patient failed to get better with nonoperative management and continued to have pain in the left hip and signs and symptoms of impingement. He improved following surgical excision of the heterotopic bone and did not have any evidence of recurrence at 2 years follow- up...
April 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
Otto Kraemer, Kjeld Søballe
No abstract text is available yet for this article.
2015: Acta Orthopaedica
Brian J White, Andrea B Stapleford, Tara K Hawkes, Michael J Finger, Mackenzie M Herzog
PURPOSE: To present minimum 2-year outcomes in patients who underwent a modified technique for arthroscopic labral reconstruction using iliotibial band allograft tissue and a front-to-back fixation. METHODS: From April 2011 to July 2012, all consecutive arthroscopic labral reconstruction patients were included in this Institutional Review Board-approved, prospective case series study. Inclusion criteria were arthroscopic iliotibial band allograft labral reconstruction performed by a single surgeon, age ≥16 years at the time of arthroscopy, and a minimum of 2 years of follow-up...
January 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Adrián Cuéllar, Miguel Angel Ruiz-Ibán, Oliver Marín-Peña, Ricardo Cuéllar
No abstract text is available yet for this article.
June 2015: Acta Orthopaedica
Claudio Rafols, Juan Edo Monckeberg, Jorge Numair
This is a report of one case of bilateral acetabular rim fracture in association with femoroacetabular impingement (FAI), which was treated with a hip arthroscopic procedure, performing a partial resection, a labral reinsertion, and a subsequential internal fixation with cannulated screws. Up to date, there are in the literature only two reports of rim fracture and "os acetabuli" in association with FAI. In the case we present, the pincer and cam resection were performed without complications; the technique used was published previously...
2015: Case Reports in Orthopedics
Timothy J Jackson, Christine E Stake, Jennifer C Stone, Dror Lindner, Youssef F El Bitar, Benjamin G Domb
PURPOSE: The purpose of this study was to evaluate the clinical, radiographic, histologic, and intraoperative findings of an amorphous calcification involving the acetabular labrum. METHODS: From October 2008 to April 2013, all patients who underwent arthroscopic hip surgery for symptomatic intra-articular hip disorders and were found to have the characteristic calcific deposit involving the acetabular labrum were included. These patients were reviewed retrospectively on prospectively collected data...
April 2014: Arthroscopy: the Journal of Arthroscopic & related Surgery
Alessandro Aprato, Alessandro Massè, Carlo Faletti, Angiola Valente, Francesco Atzori, Maurizio Stratta, Narlaka Jayasekera
BACKGROUND: Magnetic resonance arthrography (MRA) is commonly used to demonstrate injury to the labrum and hyaline cartilage in patients with femoroacetabular impingement (FAI). The purpose of this study was to assess the diagnostic correlation between MRA and findings at arthroscopic and open surgery. MATERIALS AND METHODS: MRA reports of 41 hips with symptomatic FAI were reviewed and compared with subsequent intraoperative findings (n = 21 surgical dislocations and n = 20 therapeutic hip arthroscopies)...
September 2013: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
Christopher M Larson, Rebecca M Stone
Femoroacetabular impingement (FAI) can be associated with labral ossification, acetabular rim fractures, and os acetabuli. Typically, these fragments can be completely excised as part of a femoroacetabular impingement correction procedure. In rare instances, however, larger, weight-bearing fragments contribute to pincer-type impingement, but complete removal might create structural instability or dysplasia. We report the results of 2 such cases where partial resection of a rim fracture and internal fixation of the remaining fragment were performed to correct the impingement while preserving adequate acetabular coverage...
July 2011: Arthroscopy: the Journal of Arthroscopic & related Surgery
Lucas A Anderson, Jeremy Gililland, Christopher Pelt, Samuel Linford, Gregory J Stoddard, Christopher L Peters
Anterior and lateral center edge angles have traditionally been used to determine acetabular coverage, and thereby strongly influence the decision to perform acetabular reorientation versus osteochondroplasty in patients with dysplasia and/or femoroacetabular impingement. We propose templating the center of the contained articular femoral head in aspherical hips to provide reliable assessment of acetabular coverage. Digital radiographs of 30 patients with various combinations of femoral and acetabular morphologies were evaluated using 2 methods to identify the anterior center edge angle and lateral center edge angle...
January 1, 2011: Orthopedics
Parminder J Singh, John M O'Donnell
PURPOSE: The purpose of this study was to investigate on hip pathology found at hip arthroscopy in Australian Football League (AFL) players and describe our current treatments and outcomes. METHODS: From 2003 to 2008, 24 consecutive AFL players (27 hips) had arthroscopic hip surgery by use of the lateral position. Patients were assessed preoperatively and postoperatively with the modified Harris Hip Score (MHHS) and Nonarthritic Hip Score (NAHS) and postoperatively with a satisfaction survey...
June 2010: Arthroscopy: the Journal of Arthroscopic & related Surgery
Anders Troelsen, Brian Elmengaard, Kjeld Søballe
BACKGROUND: Little is known about medium or long-term results of periacetabular osteotomy and which factors predict a poor outcome in terms of conversion to total hip replacement. The aims of this study were to assess the medium-term outcome following periacetabular osteotomy and to analyze what radiographic and patient-related factors predict a poor outcome. METHODS: One hundred and sixteen periacetabular osteotomies performed by the senior author from December 1998 to December 2002 were eligible for inclusion...
September 2009: Journal of Bone and Joint Surgery. American Volume
A E Martinez, S M Li, R Ganz, M Beck
Ossicles located at the acetabular rim are generally referred to as unfused secondary ossification centres and are named "os acetabuli". They are also observed in severely dysplastic hips, where they are considered as fatigue fractures of the acetabular rim due to overload. In a retrospective study, we evaluated the radiographs of 495 patients, who were treated surgically for femoro-acetabular impingement. In 18 hips (15 patients) a large osseous fragment at the anterolateral acetabular rim was found...
October 2006: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Ara Kassarjian, Luke S Yoon, Etienne Belzile, Susan A Connolly, Michael B Millis, William E Palmer
PURPOSE: To retrospectively analyze magnetic resonance (MR) arthrographic findings in patients with clinical cam-type femoroacetabular impingement. MATERIALS AND METHODS: This study was approved by the institutional review board, and informed consent was waived. Study was compliant with the Health Insurance Portability and Accountability Act. Forty-two MR arthrograms obtained in 40 patients with clinical femoroacetabular impingement were analyzed retrospectively by two radiologists...
August 2005: Radiology
No abstract text is available yet for this article.
July 1963: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
G M J Plötz, M Prymka, M von Knoch, B Markova, H W Ulrich, M V Knoch
In acetabular dysplasia, an overloading of the acetabular rim can cause a stress fracture, creating an 'os acetabuli', or a lesion of the acetabular labrum. At puberty, the os acetabuli seems to be the epiphysis of the os pubis. We present the case of a 14-year-old girl with acetabular dysplasia and spontaneous fusion of an 'os acetabuli' after biomechanical correction by triple pelvic osteotomy. Our report supports the correctness of the biomechanical principle: reorientation of the acetabulum results in a better coverage of the femoral head, reduces the stress at the acetabular rim, shifts the os acetabuli out of the stress region, and may allow union of the bony fragment with the acetabulum...
December 2002: Archives of Orthopaedic and Trauma Surgery
R P Pitto, G Willmann, M Schramm
Modular acetabular components with alumina ceramic liners are currently used in total hip arthroplasty, but concerns have emerged regarding their high stiffness, which could cause impairment of stability, stress-shielding phenomena, and loosening. The purpose of the present biomechanical investigation was to compare the in-vitro initial stability of a modular press-fit acetabular component using a polyethylene liner and using an alumina liner. The initial stability was investigated by measuring the micromotion between the implant and the acetabulum during the application of physiological load (2...
April 2001: Biomedizinische Technik. Biomedical Engineering
K Hergan, W Oser, B Moriggl
Ossicles located in the acetabular fossa may confuse diagnostic and therapeutic work-up. An accessory ossification centre may persist unfused as an os acetabuli centrale which is surrounded by intact hyaline cartilage representing an anatomic variant. Bone islands located in the pillars of the acetabulum can project into the acetabular fossa simulating acetabular ossicles. Osteochondrosis dissecans, posttraumatic articular bodies, degenerative disease and other rare lesions may be responsible for clinical symptoms and are of similar appearance than anatomic variants...
2000: European Radiology
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