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https://www.readbyqxmd.com/read/29785448/patella-alta-and-patellar-subluxation-might-lead-to-early-failure-with-inlay-patello-femoral-joint-arthroplasty
#1
J Beckmann, C Merz, J Huth, B Rath, C Schnurr, E Thienpont
PURPOSE: With the growing interest in resurfacing procedures, several new implants have been recently introduced for isolated patello-femoral joint arthroplasty (PFA). However, not much data are available for these new techniques or about the right indications for each type of implant. METHODS: Out of a retrospective cohort of 20 inlay PFA, 11 PFA with an elevated Insall-Salvati index and an increased patello-femoral congruence angle showed an initial satisfactory result, but presented thereafter with recurrent pain and "clunk" phenomena...
May 21, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29785392/periosteal-pseudotumor-in-complex-total-knee-arthroplasty-resembling-a-neoplastic-process
#2
Madhav Chowdhry, Matthew V Dipane, Edward J McPherson
This case report describes in detail an erosive distal diaphyseal pseudotumor that occurred 6 years after a complex endoprosthetic hinge total knee arthroplasty (TKA). A female patient had conversion of a knee fusion to an endoprosthetic hinge TKA at the age of 62. At her scheduled 6-year follow-up, she presented with mild distal thigh pain and radiographs showing a 6-7 cm erosive lytic diaphyseal lesion that looked very suspicious for a neoplastic process. An en bloc resection of the distal femur and femoral endoprosthesis was performed...
May 18, 2018: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29783868/low-bone-mineral-density-in-ambulatory-persons-with-cerebral-palsy-a-systematic-review
#3
Cindy T R Mus-Peters, Bionka M A Huisstede, Suzie Noten, Minou W M G C Hitters, Wilma M A van der Slot, Rita J G van den Berg-Emons
PURPOSE: Non-ambulatory persons with cerebral palsy are prone to low bone mineral density. In ambulatory persons with cerebral palsy, bone mineral density deficits are expected to be small or absent, but a consensus conclusion is lacking. In this systematic review bone mineral density in ambulatory persons with cerebral palsy (Gross Motor Function Classification Scales I-III) was studied. MATERIALS AND METHODS: Medline, Embase, and Web of Science were searched. According to international guidelines, low bone mineral density was defined as Z-score ≤ -2...
May 22, 2018: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29782460/interventions-for-treating-fractures-of-the-distal-femur-in-adults
#4
Amy Drahota, Yvette Revell-Smith
No abstract text is available yet for this article.
May 2018: Orthopaedic Nursing
https://www.readbyqxmd.com/read/29782037/multiloculated-solitary-unicameral-bone-cyst-in-a-young-dog
#5
Sarah C Roode, Heather R Shive, Willemijn Hoorntje, Jennifer Bernard, Devorah M Stowe, Roy R Pool, Carol B Grindem
A 20-month-old female spayed Staffordshire Terrier (22.3 kg) presented to the Orthopedic Surgery Service at North Carolina State University Veterinary Teaching Hospital for evaluation of a 6-week history of toe-touching to nonweight-bearing lameness in the right hind limb. Radiographs of the right stifle revealed a multiloculated lytic lesion of the distal femur, with a large open lytic zone centrally, numerous osseous septations peripherally, and focal areas of cortical thinning and loss. An aspirate of the right distal femoral lesion yielded mildly cloudy serosanguineous fluid...
May 21, 2018: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/29781944/early-comparative-outcomes-of-carbon-fiber-reinforced-polymer-plate-in-the-fixation-of-distal-femur-fractures
#6
Phillip M Mitchell, Adam K Lee, Cory A Collinge, Bruce H Ziran, Kate G Hartley, A Alex Jahangir
OBJECTIVE: To evaluate the early clinical results of distal femur fractures treated with carbon fiber reinforced - polyetheretherketone (CFR-PEEK) plates compared to stainless steel (SS) lateral locking plates. DESIGN: Retrospective comparative cohort study SETTING:: ACS Level I trauma center. PATIENTS/PARTICIPANTS: Twenty-two patients (11 SS, 11 CFR-PEEK) with closed distal femur fractures treated by a single surgeon over a 6-year period...
May 16, 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29781818/lower-extremity-megaprostheses-in-orthopaedic-oncology
#7
Santiago A Lozano Calderón, Joseph Kuechle, Kevin A Raskin, Francis J Hornicek
The megaprosthesis is designed to reproduce the form and function of a removed or lost large segment of bone and accompanying soft tissues. Slow but substantial improvements in the design and surgical implementation of these devices have advanced the capacity to restore patients' functional abilities. The essential challenges include identifying the ideal materials, bonding these materials to bone and soft tissues, reproducing functional anatomy, and adapting to the growing skeleton. Failure of these devices can result from soft-tissue insufficiency, aseptic loosening, structural failures, infection, and tumor recurrence...
May 17, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29778655/deviation-of-femoral-intramedullary-alignment-rod-influences-coronal-and-sagittal-alignment-during-total-knee-arthroplasty
#8
Yohei Haruta, Shinya Kawahara, Kanenobu Tsuchimochi, Akihiko Hamasaki, Toshihiko Hara
BACKGROUND: An intramedullary (IM) rod is used to resect the distal femur vertically to the femoral mechanical axis in the coronal plane in many cases of total knee arthroplasties (TKA). The valgus angle between the mechanical axis and the anatomical axis of the distal femur is estimated preoperatively. It is known the deviation of the IM rod in the femoral canal could influence the femoral component alignment. However, there is no published data regarding how many degrees of deviation to make with the IM rod...
May 16, 2018: Knee
https://www.readbyqxmd.com/read/29776736/trabecular-bone-score-at-the-distal-femur-and-proximal-tibia-in-individuals-with-spinal-cord-injury
#9
Stacey Lobos, Anne Cooke, Gillian Simonett, Chester Ho, Steven K Boyd, W Brent Edwards
Rapid declines in bone mineral density (BMD) at the knee after spinal cord injury (SCI) are associated with an increased risk of fracture. Evaluation of bone quality using the trabecular bone score (TBS) may provide a complimentary measure to BMD assessment to examine bone health and fracture risk after SCI. The purpose of this study was to assess bone mineral density (BMD) and trabecular bone score (TBS) at the knee in individuals with and without SCI. Nine individuals with complete SCI (mean time since SCI 2...
April 24, 2018: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29776439/concurrence-of-symmetrical-peripheral-gangrene-and-venous-limb-gangrene-following-polytrauma-a-case-report
#10
Jih Huei Tan, Yuzaidi Mohamad, Chor Lip Henry Tan, Mahazir Kassim, Theodore E Warkentin
BACKGROUND: Symmetrical peripheral gangrene is characterized as acral (distal extremity) ischemic limb injury affecting two or more extremities, without large vessel obstruction, typically in a symmetrical fashion. Risk factors include hypotension, disseminated intravascular coagulation, and acute ischemic hepatitis ("shock liver"). In contrast, venous limb gangrene is characterized by acral ischemic injury occurring in a limb with deep vein thrombosis. Both symmetrical peripheral gangrene and venous limb gangrene present as acral limb ischemic necrosis despite presence of arterial pulses...
May 19, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29773425/strain-rate-dependency-of-bovine-trabecular-bone-under-impact-loading-at-sideways-fall-velocity
#11
William S Enns-Bray, Stephen J Ferguson, Benedikt Helgason
There is currently a knowledge gap in scientific literature concerning the strain rate dependent properties of trabecular bone at intermediate strain rates. Meanwhile, strain rates between 10 and 200/s have been observed in previous dynamic finite element models of the proximal femur loaded at realistic sideways fall speeds. This study aimed to quantify the effect of strain rate (ε̇) on modulus of elasticity (E), ultimate stress (σu ), failure energy (Uf ), and minimum stress (σm ) of trabecular bone in order to improve the biofidelity of material properties used in dynamic simulations of sideways fall loading on the hip...
May 3, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29772836/soybean-hop-alleviates-estrogen-deficiency-related-bone-loss-and-metabolic-dysfunction-in-ovariectomized-rats-fed-a-high-fat-diet
#12
Dasom Noh, Yeni Lim, Hansol Lee, Hyejin Kim, Oran Kwon
Soybeans and hops have been traditionally used as a natural estrogen replacement therapy and their major active ingredients, isoflavones and prenylflavanones, are known to have estrogenic/antiestrogenic effects depending on the target organ. However, their potential benefits are still subject to controversies. The present study investigated the dual effect of soy isoflavones plus hop prenylflavanones (Soy-Hop) on bone loss and metabolic dysfunction under estrogen deficient condition. Rats were sham-operated ( n = 10) or ovariectomized (OVX; n = 40) and then fed a high-fat diet (HFD) to develop hyperlipidemia in OVX rats within the experimental period of 8 weeks...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29763336/adjustable-loop-femoral-cortical-suspensory-fixation-for-patellar-tendon-anterior-cruciate-ligament-reconstruction-a-time-zero-biomechanical-comparison-with-interference-screw-fixation
#13
Dayne T Mickelson, Thomas Lefebvre, Ken Gall, Jonathan C Riboh
BACKGROUND: Adjustable-loop cortical buttons for femoral fixation of bone-tendon-bone grafts have potential advantages over interference screw fixation; however, these devices have not been benchmarked biomechanically against interference screws. Purpose/Hypothesis: The purpose was to compare the time zero biomechanical properties of commercially available, adjustable-loop cortical button and metallic interference screws for femoral fixation of bone-tendon-bone grafts. It was hypothesized that no significant differences would be found in biomechanical properties between fixation techniques...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29761748/transfemoral-amputation-adductor-myodesis-using-fibertape-and-knotless-anchors
#14
Andrew R Hsu
Transfemoral amputation is considered the last treatment option for severe infection, vascular disease, trauma, and malignant tumors of the lower extremity that have failed limb salvage. Unopposed pull of the hip abductors causes a flexion-abduction thigh deformity that results in abnormal biomechanics and increased oxygen consumption during ambulation. Myodesis of the adductor tendons is a critical component of transfemoral amputation that creates dynamic muscle balance, enhances prosthetic fitting and function, and improves clinical outcomes...
May 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29759948/measuring-relative-positions-and-orientations-of-the-tibia-with-respect-to-the-femur-using-one-channel-3d-tracked-a-mode-ultrasound-tracking-system-a-cadaveric-study
#15
Kenan Niu, Jasper Homminga, Victor Sluiter, André Sprengers, Nico Verdonschot
The purpose of this study is to investigate the technical feasibility of measuring relative positions and orientations of the tibia with respect to the femur in an in-vitro experiment by using a 3D-tracked A-mode ultrasound system and to determine its accuracy of angular and translational measurements. As A-mode ultrasound is capable of detecting bone surface through soft tissue in a non-invasive manner, the combination of a single A-mode ultrasound transducer with an optical motion tracking system provides the possibility for digitizing the 3D locations of bony points at different anatomical regions on the thigh and the shank...
May 11, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29758073/effects-of-computer-assisted-navigation-versus-conventional-total-knee-arthroplasty-on-the-levels-of-inflammation-markers-a-prospective-study
#16
Shu-Jui Kuo, Horng-Chaung Hsu, Ching-Jen Wang, Ka-Kit Siu, Ya-Hung Hsu, Jih-Yang Ko, Chih-Hsin Tang
Total knee arthroplasty (TKA) is a well-established modality for the treatment of advanced knee osteoarthritis (OA). However, the detrimental effects of intramedullary reaming used in conventional TKA for distal femur cutting are of concern. Avoiding intramedullary reaming with the use of computer-assisted navigation TKA can not only provide superior prosthetic alignment, but also mitigate perioperative blood loss and the dissipation of marrow emboli. We quantified local and systemic concentrations of inflammation markers for both techniques...
2018: PloS One
https://www.readbyqxmd.com/read/29753172/the-increase-of-anterior-pelvic-tilt-after-crouch-gait-treatment-in-patients-with-cerebral-palsy
#17
Mauro César de Morais Filho, Francesco Camara Blumetti, Cátia Miyuki Kawamura, Jaqueline Bartelega Rodrigues Leite, José Augusto Fernandes Lopes, Marcelo Hideki Fujino, Daniella Lins Neves
BACKGROUND: The increase of anterior pelvic tilt (APT) has been described after the treatment of crouch gait in cerebral palsy (CP). The ideal treatment option for flexed knee gait in CP should provide knee extension improvement in the stance phase without generating the increase of APT. RESEARCH QUESTION: The purpose of this study was to compare three different approaches used for the treatment of crouch gait in CP [distal femur extension osteotomy (DFEO), patellar tendon shortening (PTS) and the combination of DFEO +PTS] regarding the increase of APT after the interventions...
May 5, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29748964/is-augmented-liss-plating-biomechanically-advantageous-over-conventional-liss-plating-in-unstable-osteoporotic-distal-femoral-fractures
#18
Dimitar Todorov, Ivan Zderic, R Geoff Richards, Mark Lenz, Matthias Knobe, Dian Enchev, Asen Baltov, Boyko Gueorguiev, Karl Stoffel
Treatment of complex osteoporotic distal femur fractures with the Less Invasive Stabilization System (LISS) has been associated with high complication rates. The aim of this study was to investigate the biomechanical competence of two different techniques of augmented versus conventional LISS plating. Unstable distal femoral fracture AO/OTA 33-A3 was created via osteotomies in artificial femora simulating osteoporotic bone. Three study groups, consisting of 10 specimens each, were created for instrumentation with either LISS plate, LISS plate with additional polylactide intramedullary graft, or LISS plate plus medial locking plate (double plating)...
May 10, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29748870/fructan-enriched-diet-increases-bone-quality-in-female-growing-rats-at-calcium-deficiency
#19
Kinga Topolska, Radosław Piotr Radzki, Agnieszka Filipiak-Florkiewicz, Adam Florkiewicz, Teresa Leszczyńska, Ewa Cieślik
This study was designed to determine the effect of feeding female rats with low-calcium diet containing one of three fructan sources (Jerusalem artichoke, yacon, Beneo Orafti Synergy1), on selected bone parameters. Growing Wistar rats were fed modified AIN-93 G diet enriched in fructan sources (8%), added alone or as a strawberry sorbet ingredient. Two of eight groups were a validation model, where the positive control group was fed with recommended calcium dose in the diet (RCD), and negative one - with low calcium diet (LCD)...
May 10, 2018: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/29742946/comparative-analysis-of-osseointegration-in-various-types-of-acetabular-implant-materials
#20
Stanislav Bondarenko, Ninel Dedukh, Volodymyr Filipenko, Mandus Akonjom, Ahmed Amine Badnaoui, Ran Schwarzkopf
BACKGROUND: There is a lack of comparative data on osseointegration (BIC) of acetabular cup surfaces in hip arthroplasty in both normal bone mineral density and in conditions of osteoporosis. AIM: To compare osseointegration of acetabular implants with various types of surfaces in an animal model with normal and osteoporotic bone tissue. MATERIAL AND METHODS: The study was performed on 60 rats. To simulate osteoporosis ovariectomy was performed in 30 animals...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
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