keyword
MENU ▼
Read by QxMD icon Read
search

Metaphysics

keyword
https://www.readbyqxmd.com/read/28205468/vascularized-medial-femoral-condyle-bone-graft-for-resistant-nonunion-of-the-distal-radius
#1
Mark Henry
BACKGROUND: Nonunion involving the metaphyseal region of the distal radius is exceedingly rare, usually involving co-morbidity. Patients that have failed multiple prior conventional surgical interventions represent an even more difficult subset to treat; this investigation examined the utility of a specially designed free vascularized medial femoral condyle flap consisting of a central structural block graft with an extended corticoperiosteal sleeve to wrap around the junctions. METHODS: Six patients (5 males, 1 female) with a mean age of 52 years had failed to achieve union involving the distal radius metaphysis after a mean of 3...
March 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28198975/short-term-sodium-alendronate-administration-improves-the-peri-implant-bone-quality-in-osteoporotic-animals
#2
Danila de Oliveira, Jaqueline Suemi Hassumi, Pedro Henrique da Silva Gomes-Ferreira, Tárik Ocon Braga Polo, Gabriel Ramalho Ferreira, Leonardo Perez Faverani, Roberta Okamoto
Objective: The aim of this study was to evaluate the bone repair process at the bone/implant interface of osteoporotic rats treated with sodium alendronate through the analysis of microtomography, real time polymerase chain reactions and immunohistochemistry (RUNX2 protein, bone sialoprotein (BSP), alkaline phosphatase, osteopontin and osteocalcin). Material and Methods: A total of 42 rats were used and divided in to the following experimental groups: CTL: control group (rats submitted to fictitious surgery and fed with a balanced diet), OST: osteoporosis group (rats submitted to a bilateral ovariectomy and fed with a low calcium diet) and ALE: alendronate group (rats submitted to a bilateral ovariectomy, fed with a low calcium diet and treated with sodium alendronate)...
January 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28196619/development-and-verification-of-novel-porous-titanium-metaphyseal-cones-for-revision-total-knee-arthroplasty
#3
Ahmad Faizan, Manoshi Bhowmik-Stoker, Amanda E Kirk, Viktor E Krebs, Steven F Harwin, R Michael Meneghini
BACKGROUND: Porous metaphyseal cones are widely used in revision knee arthroplasty. A new system of porous titanium metaphyseal cones has been designed based on the femoral and tibial morphology derived from a computed tomography-based anatomical database. The purpose of this study is to evaluate the initial mechanical stability of the new porous titanium revision cone system by measuring the micromotion under physiologic loading compared with a widely-used existing porous tantalum metaphyseal cone system...
January 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28196034/long-term-results-after-total-knee-arthroplasty-with-contemporary-rotating-hinge-prostheses
#4
Umberto Cottino, Matthew P Abdel, Kevin I Perry, Kristin C Mara, David G Lewallen, Arlen D Hanssen
BACKGROUND: Total knee arthroplasty (TKA) with a rotating-hinge prosthesis is considered a salvage procedure. While excellent immediate stability is achieved, the historically high failure rate has tempered its use. The goal of this study was to determine clinical outcomes, radiographic results, and survivorship after TKA with contemporary rotating-hinge components. METHODS: We identified 408 consecutive TKAs performed with rotating-hinge components for nononcologic indications from 2002 to 2012 at a single academic institution...
February 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28166168/evaluation-of-intra-articular-fracture-extension-following-gunshot-wounds-to-the-lower-extremity-plain-radiographs-versus-computer-tomography
#5
John S Hwang, Kenneth L Koury, George Gorgy, Michael S Sirkin, Mark C Reilly, Valdis Lelkes, Mark R Adams
OBJECTIVE: This study was to compare the use of computer tomography to plain radiographs for the evaluation of intra-articular extension of long bone fractures in the lower extremity following low-energy gunshot wounds. DESIGN: Retrospective chart and radiographic review SETTING:: Level 1 Trauma CenterPatients/Participants: Data was collected from a single institution from 2000 to 2014. Inclusion criteria consisted of patients aged greater than 17 years, low-velocity gunshot injuries causing fracture of the femur or tibia, plain radiographs with adequate films and CT imaging of the fracture...
January 24, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28163952/unintended-targeting-of-dmp1-cre-reveals-a-critical-role-for-bmpr1a-signaling-in-the-gastrointestinal-mesenchyme-of-adult-mice
#6
Joohyun Lim, Joseph Burclaff, Guangxu He, Jason C Mills, Fanxin Long
Cre/loxP technology has been widely used to study cell type-specific functions of genes. Proper interpretation of such data critically depends on a clear understanding of the tissue specificity of Cre expression. The Dmp1-Cre mouse, expressing Cre from a 14-kb DNA fragment of the mouse Dmp1 gene, has become a common tool for studying gene function in osteocytes, but the presumed cell specificity is yet to be fully established. By using the Ai9 reporter line that expresses a red fluorescent protein upon Cre recombination, we find that in 2-month-old mice, Dmp1-Cre targets not only osteocytes within the bone matrix but also osteoblasts on the bone surface and preosteoblasts at the metaphyseal chondro-osseous junction...
2017: Bone Research
https://www.readbyqxmd.com/read/28161230/-slipped-capital-femoral-epiphysis
#7
C Klein, E Haraux, J Leroux, R Gouron
Slipped capital femoral epiphysis (SFCE) is a disorder of the hip, characterized by a displacement of the capital femoral epiphysis from the metaphysic through the femoral growth plate. The epiphysis slips posteriorly and inferiorly. SCFE occurs during puberty and metabolic and epidemiologic risk factors, such as obesity are frequently found. Most chronic slips are diagnosed late. Sagittal hip X-rays show epiphysis slip. In case of untreated SCFE, a slip progression arises with an acute slip risk. Treatment is indicated to prevent slip worsening...
February 1, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28159474/proximal-ingrowth-coating-decreases-risk-of-loosening-following-uncemented-shoulder-arthroplasty-using-mini-stem-humeral-components-and-lesser-tuberosity-osteotomy
#8
Michael P Morwood, Peter S Johnston, Grant E Garrigues
BACKGROUND: Mini-stem humeral component (MSHC) use during total shoulder arthroplasty (TSA) provides bone preservation and ease of revision. MSHCs rely solely on proximal metaphyseal fixation; some early reports have demonstrated an unacceptably high rate of early loosening. To our knowledge, no study analyzing the effect of proximal porous coating on MSHCs has been performed. METHODS: We performed a retrospective review of consecutive patients who underwent anatomic TSA using coated or uncoated MSHCs with minimum 2-year follow-up...
January 31, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28155122/anisotropic-permeability-of-trabecular-bone-and-its-relationship-to-fabric-and-architecture-a-computational-study
#9
T C Kreipke, G L Niebur
Trabecular bone is a porous, mineralized tissue found in vertebral bodies, the metaphyses and epiphyses of long bones, and in the irregular and flat shaped bones. The pore space is filled with bone marrow, a highly cellular fluid. Together, the bone and marrow behave as a poroelastic solid. In poroelasticity theory, the permeability is the primary material property that governs the momentum transfer between the solid and fluid constituents. In the linearized theory, the permeability of a material depends on the shape and connectivity of the pores...
February 2, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28144601/proximal-fifth-metatarsal-fractures-anatomy-classification-treatment-and-complications
#10
REVIEW
Chi Nok Cheung, Tun Hing Lui
CONTEXT: Fractures of proximal fifth metatarsal are one of the most common fractures of the foot. EVIDENCE ACQUISITION: A search of PubMed for studies on proximal fifth metatarsal fracture and Jones fracture focusing on the classification and management was performed. The reference list of the retrieved articles was searched for additional related studies. RESULTS: The vascular supply and soft tissue anatomy of the fifth metatarsal explains the increased risk of delayed union and non-union in fractures at the metaphyseal-diaphyseal junction...
December 2016: Archives of Trauma Research
https://www.readbyqxmd.com/read/28131681/intraobserver-and-interobserver-agreement-in-the-classification-and-treatment-of-proximal-humeral-fractures
#11
Mauro E C Gracitelli, Thiago A G Dotta, Jorge H Assunção, Eduardo A Malavolta, Fernando B Andrade-Silva, Kodi E Kojima, Arnaldo A Ferreira Neto
BACKGROUND: There is controversy surrounding the reliability of radiographic measurements and existing classifications for proximal humeral fractures. METHODS: Ten orthopedists, divided into 2 groups by length of experience, evaluated radiographs in 3 views from 40 proximal humeral fractures. We evaluated 11 radiographic criteria (including the Neer and pathomorphologic classifications, head-shaft angle, displacement of the humeral shaft, and lesser and greater tuberosities) and treatment indication...
January 25, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28129271/fatigue-failure-in-extra-articular-proximal-tibia-fractures-locking-intramedullary-nail-versus-double-locking-plates-a-biomechanical-study
#12
Utku Kandemir, Safa Herfat, Mary Herzog, Paul Viscogliosi, Murat Pekmezci
OBJECTIVES: The goal of this study is to compare the fatigue strength of a locking intramedullary nail (LN) construct with a double locking plate (DLP) construct in comminuted proximal extra-articular tibia fractures. METHODS: Eight pairs of fresh frozen cadaveric tibias with low bone mineral density [age: 80 ± 7 (SD) years, T-score: -2.3 ± 1.2] were used. One tibia from each pair was fixed with LN, whereas the contralateral side was fixed with DLP for complex extra-articular multifragmentary metaphyseal fractures (simulating OTA 41-A3...
February 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28128005/isolated-metaphyseal-injury-influences-unrelated-bones
#13
Love Tätting, Olof Sandberg, Magnus Bernhardsson, Jan Ernerudh, Per Aspenberg
Background and purpose - Fracture healing involves different inflammatory cells, some of which are not part of the traditional bone field, such as B-cells and cytotoxic T-cells. We wanted to characterize bone healing by flow cytometry using 15 different inflammatory cell markers in a mouse model of metaphyseal injury, and incidentally discovered a previously unknown general skeletal reaction to trauma. Material and methods - A bent needle was inserted and twisted to traumatize the cancellous bone in the proximal tibia of C57/Bl6 female mice...
January 27, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28127940/additional-three-patients-with-smith-mccort-dysplasia-due-to-novel-rab33b-mutations
#14
Smrithi Salian, Tae-Joon Cho, Shubha R Phadke, Kalpana Gowrishankar, Gandham SriLakshmi Bhavani, Anju Shukla, Sujatha Jagadeesh, Ok-Hwa Kim, Gen Nishimura, Katta M Girisha
Smith-McCort dysplasia (SMC OMIM 615222) and Dyggve-Melchior-Clausen dysplasia (DMC OMIM 223800) are allelic skeletal dysplasias caused by homozygous or compound heterozygous mutations in DYM (OMIM 607461). Both disorders share the same skeletal phenotypes characterized by spondylo-epi-metaphyseal dysplasia with distinctive lacy ilia. The difference rests on the presence or absence of intellectual disability, that is, intellectual disability in DMC and normal cognition in SMC. However, genetic heterogeneity was suspected in SMC...
January 27, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28126634/the-relationship-of-maternal-bone-density-with-nutritional-rickets-in-nigerian-children
#15
Jennifer Hsu, Philip R Fischer, John M Pettifor, Tom D Thacher
Factors that affect maternal bone mineral density may be related to the risk of nutritional rickets in their offspring. Our aim was to determine the relationship between maternal areal bone mineral density (aBMD) and rickets in Nigerian children. Using a case-control design, we measured forearm aBMD in 56 and 135 mothers of children with and without nutritional rickets, respectively. Active rickets was confirmed or excluded in all children radiographically. Using logistic regression, we assessed the association of maternal aBMD, adjusted for parity, pregnancy and lactation status, duration of most recent completed lactation, age of menarche, height, body mass index, and maternal age with nutritional rickets...
January 23, 2017: Bone
https://www.readbyqxmd.com/read/28120098/analysis-of-four-fragment-fractures-of-the-proximal-humerus-the-interest-of-2d-and-3d-imagery-and-inter-and-intra-observer-reproducibility
#16
X Ohl, P Mangin, C Barbe, V Brun, C Nerot, F Sirveaux
The treatment of the four-part fractures of the proximal humerus remains a therapeutic challenge. The decision-making is based on preoperative criteria concerning the displacement of the fracture, the stability of the fracture and the risk of avascular necrosis of the humeral head. The aim of this study was to analyse the inter- and intra-observer reproducibility of those criteria previously described by Hertel. Three observers analysed three times 20 radiologic files comprising 2D X-rays, 2D CT scan and 3D reconstructions for the intra-observer study, and an expert committee was used to assess the inter-observer reproducibility...
January 24, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28119794/the-oblique-metaphyseal-shortening-osteotomy-of-the-distal-ulna-surgical-technique-and-results-of-ten-patients
#17
Szabolcs Benis, Jean F Goubau, Koen Mermuys, Petrus Van Hoonacker, Bart Berghs, Diederick Kerckhove, Bert Vanmierlo
Background Ulnocarpal abutment is a common condition following distal radius fractures. There are different surgical methods of treatment for this pathology: open and arthroscopic wafer procedure or an ulnar shortening osteotomy. We describe an oblique metaphyseal shortening osteotomy of the distal ulna using two cannulated headless compression screws. We report the results of 10 patients treated with this method. Materials and Methods Out of 17 patients, 10 could be reviewed retrospectively for this study...
February 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28116309/analysis-of-the-osteogenic-effects-of-biomaterials-using-numerical-simulation
#18
Lan Wang, Jie Zhang, Wen Zhang, Hui-Lin Yang, Zong-Ping Luo
We describe the development of an optimization algorithm for determining the effects of different properties of implanted biomaterials on bone growth, based on the finite element method and bone self-optimization theory. The rate of osteogenesis and the bone density distribution of the implanted biomaterials were quantitatively analyzed. Using the proposed algorithm, a femur with implanted biodegradable biomaterials was simulated, and the osteogenic effects of different materials were measured. Simulation experiments mainly considered variations in the elastic modulus (20-3000 MPa) and degradation period (10, 20, and 30 days) for the implanted biodegradable biomaterials...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28110848/cementless-hip-stem-anteversion-in-the-dysplastic-hip-a-comparison-of-tapered-wedge-vs-metaphyseal-filling
#19
Naofumi Taniguchi, Tetsuya Jinno, Daisuke Koga, Tetsuo Hagino, Atsushi Okawa, Hirotaka Haro
BACKGROUND: Appropriate stem anteversion is important for achieving stability of the prosthetic joint in total hip arthroplasty. Anteversion of a cementless femoral stem is affected by the femoral canal morphology and varies according to stem geometry. We investigated the difference and variation of the increase in anteversion between 2 types of cementless stems, and the correlation between each stem and the preoperative femoral anteversion. METHODS: We retrospectively compared 2 groups of hips that underwent total hip arthroplasty using a metaphyseal filling stem (78 hips) or a tapered wedge stem (83 hips)...
December 22, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28109761/survivorship-of-metaphyseal-sleeves-in-revision-total-knee-arthroplasty
#20
Brian P Chalmers, Nicholas M Desy, Mark W Pagnano, Robert T Trousdale, Michael J Taunton
BACKGROUND: Metaphyseal fixation has promising early results in providing component stability and fixation in revision total knee arthroplasty (TKA). However, there are limited studies on midterm results of metaphyseal sleeves. We analyzed complications, rerevisions, and survivorship free of revision for aseptic loosening of metaphyseal sleeves in revision TKA. METHODS: Two hundred eighty patients with 393 metaphyseal sleeves (144 femoral, 249 tibial) implanted during revision TKA from 2006-2014 were reviewed...
December 14, 2016: Journal of Arthroplasty
keyword
keyword
66869
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"