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https://www.readbyqxmd.com/read/29774956/cement-interface-and-bone-stress-in-total-hip-arthroplasty-relationship-to-head-size
#1
Teresa Alonso-Rasgado, Jose F Del-Valle-Mojica, David Jimenez-Cruz, Colin G Bailey, Tim N Board
The use of larger prosthetic femoral heads in total hip arthroplasty (THA) has increased considerably in recent years in response to the need to improve joint stability and reduce risk of dislocation. However, data suggests larger femoral heads are associated with higher joint failure rates. For cemented implants, ensuring the continued integrity of the cement mantle is key to long term fixation. This paper describes an investigation into the effect of variation in femoral head size on stresses in the acetabular cement mantle and pelvic bone...
May 18, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29683436/useful-intraoperative-technique-for-percutaneous-stabilization-of-bilateral-posterior-pelvic-ring-injuries
#2
Jonathan G Eastman, Reilly J Kuehn, Milton L Chip Routt
Treating patients with bilateral posterior pelvic ring injuries can be challenging. Placement of transiliac-transsacral style screws in available S1 or S2 osseous fixation pathways is becoming an increasingly common fixation method for these unstable injuries. We propose a percutaneous technique that sequences reduction and stabilization of 1 hemipelvis with at least 1 transiliac-transsacral screw and then uses the existing transiliac-transsacral screw and accompanying guide wires to assist in temporary stabilization and definitive fixation of the second hemipelvis...
May 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29600204/acetabular-fracture-after-hip-hemiarthroplasty-one-stage-procedure-to-a-total-hip-arthroplasty-after-stabilization-of-the-fracture-by-means-of-cerclage-wires
#3
Vanlommel Jan, Vanderschot Paul
Introduction: Hip fractures in the elderly pose an increasing problem in society. In the elderly, a bipolar hemiarthroplasty (HA) remains the treatment of choice in case of hip fractures related to osteoporosis. However, due to an ongoing osteoporosis in this age group, a periprosthetic femoral fracture and a fracture of the unresurfaced acetabulum are increasingly noticed.In the literature, no information can be found regarding the treatment options for this kind of periprosthetic acetabular fracture...
November 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29503691/a-new-modified-method-for-inserting-iliosacral-screw-versus-the-conventional-method
#4
Sina Javidmehr, Mohammad Reza Golbakhsh, Babak Siavashi, Parham Talebian, Morteza Dehnokhalaji, Mohammad Javad Zehtab, Mohammadreza Bozorgmanesh
Study Design: Methodological study. Purpose: To our knowledge, this is the first study to introduce a new modified method for inserting iliosacral screws and to compare its results with those of a conventional method. Overview of Literature: Previous techniques, such as open reduction and internal fixation, are associated with perioperative hemorrhage, postoperative infection, and neurological deficits. Although percutaneous iliosacral screw insertion confers the advantage of being minimally invasive, leading to less blood loss and a low postoperative infection rate, it harbors the risk of screw malpositioning due to narrow sacral proportions and a high interindividual variability...
February 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/29218390/gemelli-obturator-complex-in-the-deep-gluteal-space-an-anatomic-and-dynamic-study
#5
Ramon Balius, Antonio Susín, Carles Morros, Montse Pujol, Dolores Pérez-Cuenca, Xavier Sala-Blanch
OBJECTIVE: To investigate the behavior of the sciatic nerve during hip rotation at subgluteal space. MATERIALS AND METHODS: Sonographic examination (high-resolution ultrasound machine at 5.0-14 MHZ) of the gemelli-obturator internus complex following two approaches: (1) a study on cadavers and (2) a study on healthy volunteers. The cadavers were examined in pronation, pelvis-fixed position by forcing internal and external rotations of the hip with the knee in 90° flexion...
December 7, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29209809/reduction-and-temporary-stabilization-of-tile-c-pelvic-ring-injuries-using-a-posteriorly-based-external-fixation-system
#6
Murphy P Martin, David Rojas, Cyril Mauffrey
Tile C pelvic ring injuries are challenging to manage even in the most experienced hands. The majority of such injuries can be managed using percutaneous reduction techniques, and the posterior ring can be stabilized using percutaneous transiliac-transsacral screw fixation. However, a subgroup of patients present with inadequate bony corridors, significant sacral zone 2 comminution or significant lateral/vertical displacement of the hemipelvis through a complete sacral fracture. Percutaneous strategies in such circumstances can be dangerous...
December 5, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29194747/standardization-of-hemipelvis-alignment-for-in-vitro-biomechanical-testing
#7
Federico Morosato, Francesco Traina, Luca Cristofolini
Although in vitro biomechanical tests are regularly performed, the definition of a suitable reference frame for hemipelvic specimens is still a challenge. The aims of the present study were to: (i) define a reference frame for the human hemipelvis suitable for in vitro applications, based on robust anatomical landmarks; (ii) identify the alignment of a hemipelvis based on the alignment of a whole pelvis (including right/left and male/female differences); (iii) identify the relative alignment of the proposed in vitro reference frame with respect to a reference frame commonly used in gait analysis; (iv) create an in vitro alignment procedure easy, robust and inexpensive; (v) quantify the intra-operator repeatability and inter-operator reproducibility of the procedure...
November 30, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29168236/a-prospective-multicenter-phase-ii-study-of-intrabone-marrow-transplantation-of-unwashed-cord-blood-using-reduced-intensity-conditioning
#8
Masaya Okada, Taizo Tasaka, Kazuhiro Ikegame, Nobuyuki Aotsuka, Takeshi Kobayashi, Yuho Najima, Yoshiko Matsuhashi, Hideho Wada, Hirotoshi Tokunaga, Shinichi Masuda, Yoshikazu Utsu, Satoshi Yoshihara, Katsuji Kaida, Takashi Daimon, Hiroyasu Ogawa
Cord blood transplantation (CBT) is associated with delayed hematopoietic recovery and graft failure. To overcome these problems, we conducted a prospective, multicenter phase II study of intrabone marrow transplantation in which patients received reduced-intensity conditioning without anti-thymocyte globulin (ATG). The primary endpoint was the probability of full donor engraftment. Forty patients with hematologic malignancies were enrolled. Cord blood (CB) cells were injected without washing into 4 iliac bone sites (2 at each hemipelvis), at which approximately 6 mL of CB was administered at one site with local anesthesia...
April 2018: European Journal of Haematology
https://www.readbyqxmd.com/read/29054990/how-3d-patient-specific-instruments-improve-accuracy-of-pelvic-bone-tumour-resection-in-a-cadaveric-study
#9
A Sallent, M Vicente, M M Reverté, A Lopez, A Rodríguez-Baeza, M Pérez-Domínguez, R Velez
OBJECTIVES: To assess the accuracy of patient-specific instruments (PSIs) versus standard manual technique and the precision of computer-assisted planning and PSI-guided osteotomies in pelvic tumour resection. METHODS: CT scans were obtained from five female cadaveric pelvises. Five osteotomies were designed using Mimics software: sacroiliac, biplanar supra-acetabular, two parallel iliopubic and ischial. For cases of the left hemipelvis, PSIs were designed to guide standard oscillating saw osteotomies and later manufactured using 3D printing...
October 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/29053542/biomechanical-comparison-of-intrapelvic-and-extrapelvic-fixation-for-acetabular-fractures-involving-the-quadrilateral-plate
#10
Gregory J Gillispie, Sharon N Babcock, Kyle P McNamara, Michaela E Dimoff, Arun Aneja, Philip J Brown, Eben A Carroll
OBJECTIVES: Elderly patients represent the fastest growing and most difficult to treat population sustaining acetabular fractures. When treated surgically, isolated extrapelvic or combined intrapelvic-extrapelvic constructs may be used. No biomechanical or clinical study has compared the merits of these 2 techniques in cadaveric models. This research aims to biomechanically quantify the additional benefit of intrapelvic fixation to a standard extrapelvic fixation construct. METHODS: Ten cadaveric pelves underwent standardized anterior column and quadrilateral plate fracture creation...
November 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28971089/posterior-sacroiliac-osteotomy-an-alternative-to-the-ilioinguinal-approach-for-pelvic-reconstruction-in-misalignment-lesions
#11
João Antonio Matheus Guimarães, Vinícius Magno da Rocha, André Luiz Loyelo Barcellos
Pelvic ring fractures occur in association with potentially fatal lesions, whose treatment is a priority in the polytrauma setting. As consequence, the definitive orthopedic approach may be postponed, leading patients to chronic and potentially disabling deformities. The treatment of these deformities is a challenge, requiring highly complex and staged surgical reconstructions. The ilioinguinal approach has been widely used in these surgeries, because it allows the release and mobilization of the hemipelvis and, in some cases, anterior fixation of the sacroiliac joint...
2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28889364/open-complete-anterior-dislocation-of-the-sacro-iliac-joint-in-a-4-year-old-boy-a-case-report-of-a-rare-injury-with-5-year-follow-up
#12
Walid A Elnahal, Mahmoud Fahmy, Mehool Acharya
Pelvic fractures are uncommon in children and account for between 0.3 and 7.5% of all pediatric injuries. Open pelvic fractures only account for up to 12.9% of all pediatric pelvic fractures. An unusual case of open complete anterior sacro-iliac joint dislocation in a 4-year-old boy is presented with a long-term follow-up. The multidisciplinary approach is reported with review of the current literature. A 4-year-old male presented to our institution in January 2012 after having been run over by a tractor. He presented with gross hemodynamical instability, MISS of 25, and an unstable lateral compression type III pelvic fracture with complete anterior dislocation of the left hemipelvis and a groin wound extending into the left thigh...
April 2018: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28833500/primary-stability-of-a-cementless-acetabular-cup-in-a-cohort-of-patient-specific-finite-element-models
#13
Dermot O' Rourke, Rami Al-Dirini, Mark Taylor
The primary stability achieved during total hip arthroplasty determines the long-term success of cementless acetabular cups. Pre-clinical finite element testing of cups typically use a model of a single patient and assume the results can be extrapolated to the general population. This study explored the variability in predicted primary stability of a Pinnacle ® cementless acetabular cup in 103 patient-specific finite element models of the hemipelvis and examined the association between patient-related factors and the observed variability...
August 18, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28808345/minimally-invasive-treatment-of-both-column-acetabular-fractures-through-the-stoppa-combined-with-iliac-fossa-approach
#14
Ruipeng Zhang, Yingchao Yin, Shilun Li, Zhiyong Hou, Juan Wang, Wei Chen, Yingze Zhang
Both-column fractures are the most complicated group of acetabular fractures. Although great progress of surgical technique has been made, the choice of approach is controversial. All the fragments could be exposed and managed through combined ilioinguinal and Kocher-Langenbeck (IL+KL) approaches, which has been widely used to conduct the both-column fractures. However, the clinical popularization may be restricted for high rate of complication. Most internal area of the hemipelvis could be exposed through Stoppa combined with iliac fossa (S+IF) approach...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729099/implementing-a-cervical-sentinel-lymph-node-biopsy-program-quality-improvement-in-gynaecologic-oncology
#15
Maria C Cusimano, Rachel Walker, Marcus Q Bernardini, Geneviève Bouchard-Fortier, Stephane Laframboise, Taymaa May, Joan Murphy, Barry Rosen, Al Covens, Blaise Clarke, Patricia Shaw, Marjan Rouzbahman, Ravi Mohan, Sarah E Ferguson
OBJECTIVE: Sentinel lymph node (SLN) biopsy is becoming a reasonable alternative to pelvic lymphadenectomy in early-stage cervical cancer. It is therefore imperative that centres without prior experience are able to successfully implement the procedure. The objectives of the current study were to (1) describe the process of implementing an SLN biopsy program with a novel peer mentorship component and (2) assess post-program quality improvement metrics, including SLN detection rate (DR) and diagnostic parameters...
August 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28604450/low-volume-lymph-node-metastases-in-endometrial-carcinoma
#16
Lani K Clinton, Jordan Kondo, Michael E Carney, Pamela Tauchi-Nishi, Keith Terada, David Shimizu
OBJECTIVE: The aim of this study was to determine the histopathologic characteristics of patients with endometrial carcinoma with low-volume metastases (micrometastases and isolated tumor cells) compared with macrometastases. METHODS: We performed a retrospective review of patients with endometrial carcinoma. RESULTS: Among 350 robotic-assisted hysterectomies for endometrial cancer, 187 (53%) underwent attempted sentinel lymph node (SLN) biopsy...
July 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28493805/creating-three-dimensional-printed-models-of-acetabular-fractures-for-use-as-educational-tools
#17
Matthew S Manganaro, Yoav Morag, William J Weadock, Corrie M Yablon, Kara Gaetke-Udager, Erica B Stein
Acetabular fractures are frequently encountered in some clinical practices, and the precise classification of these fractures greatly influences treatments and outcomes. The authors identified the need for an educational aid when teaching acetabular fracture classifications, given the complex spatial anatomy and the nonintuitive classification system that is commonly used. Three-dimensional ( 3D three-dimensional ) printing is an evolving technique that has applications as an educational aid, providing the student with a tangible object to interact with and learn from...
May 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28409337/surgical-considerations-with-the-operative-fixation-of-unstable-paediatric-pelvic-ring-injuries
#18
Mohamed Kenawey
INTRODUCTION: The operative treatment of unstable pelvic injuries in paediatrics is not frequently indicated. The detailed modes of pelvic ring failure, surgical techniques, fixation choices, and peri-operative difficulties are not well reported. METHODS: From September 2010 to March 2016, 62 paediatric patients were admitted to an academic level I trauma center with the diagnosis of pelvic ring injury. Of them, 29 (17 males and 12 females) had operative fixation of unstable pelvic injuries...
September 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28163241/application-of-3d-printing-for-treating-fractures-of-both-columns-of-the-acetabulum-benefit-of-pre-contouring-plates-on-the-mirrored-healthy-pelvis
#19
P Upex, P Jouffroy, G Riouallon
Acetabular fractures can be challenging to treat, in part because the shape of the fixation plates needs to be adjusted during the surgical procedure. One possibility is to generate a model of the uninjured half of a fractured pelvis with 3D printing, and then pre-contour the fixation plates preoperatively on this model. The purpose of this technical note is to describe how we used 3D printing as an aid to treat acetabular fractures. The quality of the fracture reduction, fracture fixation and time savings were evaluated...
May 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27921206/periacetabular-osteotomy-provides-higher-survivorship-than-rim-trimming-for-acetabular-retroversion
#20
COMPARATIVE STUDY
Corinne A Zurmühle, Helen Anwander, Christoph E Albers, Markus S Hanke, Simon D Steppacher, Klaus A Siebenrock, Moritz Tannast
BACKGROUND: Acetabular retroversion can cause impaction-type femoroacetabular impingement leading to hip pain and osteoarthritis. It can be treated by anteverting periacetabular osteotomy (PAO) or acetabular rim trimming with refixation of the labrum. There is increasing evidence that acetabular retroversion is a rotational abnormality of the entire hemipelvis and not a focal overgrowth of the anterior acetabular wall, which favors an anteverting PAO. However, it is unknown if this larger procedure would be beneficial in terms of survivorship and Merle d'Aubigné scores in a midterm followup compared with rim trimming...
April 2017: Clinical Orthopaedics and related Research
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