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https://www.readbyqxmd.com/read/28208893/comparative-evaluation-of-mastoid-cavity-obliteration-by-vascularised-temporalis-myofascial-flap-and-deep-temporal-fascial-periosteal-flap-in-canal-wall-down-mastoidectomy
#1
Navjot Kaur, Dinesh Kumar Sharma, Jagdeepak Singh
INTRODUCTION: A consensus is emerging amongst otologists that obliteration of the mastoid cavity that results after modified radical mastoidectomy is a sound option to prevent cavity related problems such as otorrhoea, infection, granulation tissue and hearing loss. A variety of techniques have been proposed to perform the obliteration. AIM: The present study aimed to compare the conventional method of mastoid cavity obliteration by vascularised temporalis myofascial flap with deep temporal fascial-periosteal flap in canal wall down mastoidectomy...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205458/nomenclature-classification-and-documentation-of-catastrophic-fractures-and-associated-preexisting-injuries-in-racehorses
#2
Susan M Stover
Racehorses are susceptible to bone fractures when damage from repetitive, high-magnitude loads incurred during training and racing exceed concurrent damage removal and replacement, resulting in transient periods of focal osteoporosis and bone weakening. Clinically, these events correspond to cortical stress fractures and subchondral bone stress remodeling. Evidence of these preexisting lesions include periosteal callus, endosteal callus, and intracortical focal hyperemia for cortical stress fractures; and subchondral focal hyperemia located superficial to sclerotic compacted trabecular bone tissue for subchondral stress remodeling...
February 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28205407/collagen-fiber-orientation-in-primate-long-bones
#3
Johanna Warshaw, Timothy G Bromage, Carl J Terranova, Donald H Enlow
Studies of variation in orientation of collagen fibers within bone have lead to the proposition that these are preferentially aligned to accommodate different kinds of load, with tension best resisted by fibers aligned longitudinally relative to the load, and compression best resisted by transversely aligned fibers. However, previous studies have often neglected to consider the effect of developmental processes, including constraints on collagen fiber orientation (CFO), particularly in primary bone. Here we use circularly polarized light microscopy to examine patterns of CFO in cross-sections from the midshaft femur, humerus, tibia, radius and ulna in a range of living primate taxa with varied body sizes, phylogenetic relationships and positional behaviors...
February 16, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28193743/yaws-osteoperiostitis-treated-with-single-dose-azithromycin
#4
Camila González-Beiras, Martí Vall-Mayans, Ángel González-Escalante, Kelly McClymont, Li Ma, Oriol Mitjà
The etiologic agent of yaws, Treponema pallidum subsp. pertenue, causes a multistage infection transmitted by nonsexual contact with the exudates from active lesions. Bone lesions in the form of osteoperiostitis are common and occur in numerous bones simultaneously in early stages. Although a multinational eradication campaign with mass administration of intramuscular benzylpenicillin in the 1950s greatly reduced its global incidence, a resurgence of yaws has occurred since around 2000 in western and central Africa and the Pacific Islands...
February 13, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28186845/image-findings-of-bisphosphonate-related-osteonecrosis-of-jaws-comparing-with-osteoradionecrosis
#5
Kenichi Obinata, Shinichi Shirai, Hitoshi Ito, Motoyasu Nakamura, Marco Carrozzo, Iain Macleod, Andrew Carr, Yutaka Yamazaki, Kanchu Tei
OBJECTIVES: The aim of this study was to evaluate image characteristics of bisphosphonate related osteonecrosis of the jaws (BRONJ) and compare these with osteoradionecrosis (ORN). METHODS: Thirty-four patients with BRONJ and 16 patients with ORN were included in this study. We investigated the computed tomography (CT) and Dental Panoramic Radiograph (DPR) images for osteolysis, osteosclerosis, sequesteration, periosteal reaction, pathological fracture, and spread of soft tissue inflammation around the jaws...
February 10, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28185728/skeletal-fluorosis-in-marsupials-a-comparison-of-bone-lesions-in-six-species-from-an-australian-industrial-site
#6
Clare Death, Graeme Coulson, Uwe Kierdorf, Horst Kierdorf, Richard Ploeg, Simon M Firestone, Ian Dohoo, Jasmin Hufschmid
In this study we explored the prevalence, type, location and severity of skeletal lesions in six species of Australian marsupial (Macropus giganteus, Notamacropus rufogriseus, Wallabia bicolor, Phascolarctos cinereus, Trichosurus vulpecula and Pseudocheirus peregrinus) from high and low-fluoride environments. Lesions occurred to varying extents in all species, and lesion distribution varied with biomechanical differences in gait and mastication. Bone fluoride levels increased with severity of periosteal hyperostosis...
February 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28170186/live-tissue-imaging-to-elucidate-mechanical-modulation-of-stem-cell-niche-quiescence
#7
Nicole Y C Yu, Connor A O'Brien, Iveta Slapetova, Renee M Whan, Melissa L Knothe Tate
The periosteum, a composite cellular connective tissue, bounds all nonarticular bone surfaces. Like Velcro, collagenous Sharpey's fibers anchor the periosteum in a prestressed state to the underlying bone. The periosteum provides a niche for mesenchymal stem cells. Periosteal lifting, as well as injury, causes cells residing in the periosteum (PDCs) to change from an immobile, quiescent state to a mobile, active state. The physical cues that activate PDCs to home to and heal injured areas remain a conundrum...
January 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28162855/histopathological-and-scanning-electron-microscopy-findings-of-retrieved-porous-polyethylene-implants
#8
S-Y Choi, H-I Shin, T-Y Kwon, T-G Kwon
Porous polyethylene (PPE) implants are biocompatible alloplastic materials commonly used for facial augmentation. However, the effect of sub-periosteal PPE application on the surrounding tissues has not been analyzed clearly. This report documents the case of a 22-year-old woman who underwent peri-alar augmentation with PPE to improve midface retrusion. Although no infection or inflammation occurred at the surgical site, the patient requested removal of the PPE implant for aesthetic reasons alone at 1 year after the surgery...
February 2, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28162164/-repair-mechanisms-of-the-wounds-with-exposed-bone-structures-using-an-artificial-dermis
#9
X Chen, C Wang, C Zhang, X Huang, H S Cao
Objective: To investigate the repair mechanisms of the wounds with bone exposed by artificial dermis transplantation. Methods: Seventy two rabbits were randomly divided into 3 groups of 24 rabbits, the wound model was made on the top of head. In the skin defect group (SD group), skin was removed and skull periosteum was retained. In the periosteal defect group (PD group), the skin and skull periosteum were both removed, and the skull was exposed. In the skull burn group (SB group), after the periosteum was removed, the exposed skull bone was burned out with electric iron to cause skull surface necrosis, then the artificial dermis transplantation were performed in each group...
January 24, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28161235/practical-use-of-imaging-technique-for-management-of-bone-and-soft-tissue-tumors
#10
Shinji Miwa, Takanobu Otsuka
Imaging modalities including radiography, computed tomography (CT), and magnetic resonance imaging (MRI) are necessary for the diagnosis of bone and soft tissue tumors. The history of imaging began with the discovery of X-rays in the 19th century. The development of CT, MRI, ultrasonography, and positron emission tomography (PET) have improved the management of bone and soft tissue tumors. X-ray imaging and CT scans enable the evaluation of bone destruction, periosteal reaction, sclerotic changes in lesions, condition of cortical bone, and ossification...
February 1, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28145573/static-osteogenesis-does-not-precede-dynamic-osteogenesis-in-periosteal-ossification-of-pleurodeles-caudata-amphibia-and-pogona-squamata-lepidosauria
#11
Jorge Cubo, Mylaine Hui, François Clarac, Alexandra Quilhac
Two successive mechanisms have been described in perichondral ossification: (1) in static osteogenesis, mesenchymal cells differentiate into stationary osteoblasts oriented randomly, which differentiate into osteocytes in the same site; (2) in dynamic osteogenesis, mesenchymal cells differentiate into osteoblasts that are all oriented in the same direction and move back as they secrete collagen fibers. This study is aimed at testing the hypothesis that the ontogenetic sequence static then dynamic osteogenesis observed in the chicken and in the rabbit is homologous and was acquired by the last common ancestor of amniotes or at a more inclusive node...
February 1, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28144583/novel-case-of-trevor-s-disease-adult-onset-and-later-recurrence
#12
Amrit S Khalsa, Neil S Kumar, Matthew A Chin, Richard D Lackman
Dysplasia epiphysealis hemimelica (DEH), or Trevor's disease, is an osteocartilaginous epiphyseal overgrowth typically occurring in children. The literature reports 6 adult cases and none describe recurrence requiring additional procedures. We present a new-onset proximal tibial DEH in an adult recurring approximately 3 years after open excision. A 39-year-old female presented with a history of right knee pain, swelling, and instability. Physical examination revealed a firm proximal tibial mass. Computed tomography (CT) imaging showed an exophytic, lobulated, sclerotic mass involving the anterolateral margin of the lateral tibial plateau...
January 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28141694/toddler-s-fractures-time-to-weight-bear-with-regard-to-immobilization-type-and-radiographic-monitoring
#13
Jennifer M Bauer, Steven A Lovejoy
BACKGROUND: The toddler's fracture is a common pediatric nondisplaced spiral tibia fracture that is considered stable with a course of immobilization. However, there is no widely accepted type of immobilization, expected time to weight-bear, nor guidelines for radiographic monitoring. We aimed to compare immobilization type with respect to displacement and time to weight-bear, as well as determine the usefulness of follow-up radiographs. METHODS: A 3-year retrospective chart review of all children aged 9 months to 4 years who had a lower leg radiograph was performed...
January 30, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28135751/-surgery-of-lower-eyelid-ectropion-with-the-tarsal-strip-procedure-using-absorbable-or-non-absorbable-sutures-for-periosteal-fixation
#14
F Sommer
Purpose Tightening of the lower eyelid is often performed and many techniques are available. This paper describes the outcome of lower eyelid ectropion repair using the lateral tarsal strip procedure. Periosteal fixation of the tarsal strip can be performed with absorbable or non-absorbable sutures. This study compares the surgical results of periosteal fixation of the tarsal strip with a) absorbable and b) non-absorbable suture. Methods Of 206 patients who underwent surgery, data from 161 were available. During the 6 month follow-up period, suture material, recurrence rates and complications were assessed...
January 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28132851/patient-reported-social-psychological-and-urologic-outcomes-after-adult-buried-penis-repair
#15
Maria A Voznesensky, W Thomas Lawrence, Jerrod N Keith, Bradley A Erickson
OBJECTIVE: To assess changes in hygiene, urination and sexual activity after surgery for adult, acquired buried penis repair. MATERIALS/METHODS: The study included men that underwent buried penis repair from 2011 to 2015. Patients were asked pre, post op questions on hygiene, urinary difficulties, sexual difficulties and difficulties with activities of daily living (modified PBSQol questionnaire). Post-operative satisfaction was assessed at a minimum of 6 month...
January 26, 2017: Urology
https://www.readbyqxmd.com/read/28121384/bioarchaeology-of-adaptation-to-a-marginal-environment-in-bronze-age-western-china
#16
Elizabeth Berger, Hui Wang
OBJECTIVES: This study examines human adaptation to the 4000 BP climate change event, which is said to have increased the marginality of Inner Asian environments. We propose to define "marginal" environments not in relation to a specific economic activity (e.g., agriculture), but in relation to whether humans living there are physiologically stressed. METHODS: Three sites in the Hexi Corridor of Gansu were studied, one from the early and two from the late Bronze Age (N = 125)...
January 25, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28116207/primary-idiopathic-osteoarthropathy-could-it-be-related-to-alcoholism
#17
Yanal Alnimer, Suresh Subedi, Thair Dawood, Ghassan Bachuwa
Background. Hypertrophic osteoarthropathy (HOA) is a syndrome characterized by abnormal proliferation of the skin and bony structures at the distal extremities resulting in digital clubbing, periosteal bony reaction, and joint effusion. It can be primary (idiopathic) without any clear identifiable etiology as well as secondary to variety of systemic diseases most notably lung pathology. Case Presentation. We describe a rare case of primary idiopathic osteoarthropathy in a male patient who presented with severe pain and tenderness in his legs...
2017: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/28096061/connexin37-deficiency-alters-organic-bone-matrix-cortical-bone-geometry-and-increases-wnt-%C3%AE-catenin-signaling
#18
Rafael Pacheco-Costa, Jay R Kadakia, Emily G Atkinson, Joseph M Wallace, Lilian I Plotkin, Rejane D Reginato
Deletion of connexin (Cx) 37 in mice leads to increased cancellous bone mass due to defective osteoclast differentiation. Paradoxically; however, Cx37-deficient mice exhibit reduced cortical thickness accompanied by higher bone strength, suggesting a contribution of Cx37 to bone matrix composition. Thus, we investigated whether global deletion of Cx37 alters the composition of organic bone extracellular matrix. Five-month-old Cx37(-/-) mice exhibited increased marrow cavity area, and periosteal and endocortical bone surface resulting in higher total area in tibia compared to Cx37(+/+) control mice...
January 16, 2017: Bone
https://www.readbyqxmd.com/read/28092776/periosteum-tissue-engineering-in-an-orthotopic-in%C3%A2-vivo-platform
#19
J G Baldwin, F Wagner, L C Martine, B M Holzapfel, C Theodoropoulos, O Bas, F M Savi, C Werner, E M De-Juan-Pardo, D W Hutmacher
The periosteum plays a critical role in bone homeostasis and regeneration. It contains a vascular component that provides vital blood supply to the cortical bone and an osteogenic niche that acts as a source of bone-forming cells. Periosteal grafts have shown promise in the regeneration of critical size defects, however their limited availability restricts their widespread clinical application. Only a small number of tissue-engineered periosteum constructs (TEPCs) have been reported in the literature. A current challenge in the development of appropriate TEPCs is a lack of pre-clinical models in which they can reliably be evaluated...
March 2017: Biomaterials
https://www.readbyqxmd.com/read/28073652/tarsal-tunnel-syndrome-due-to-three-different-types-of-ganglion-during-a-12-year-period-a-case-report
#20
Motohisa Kawakatsu, Toshihiro Ishiko, Masafumi Sumiya
A 52-year-old male complained of numbness and radiating pain affecting the plantar region of his left foot. He was found to have recurrent tarsal tunnel syndrome due to posterior tibial nerve compression by 3 different types of ganglion during a 12-year period. To the best of our knowledge, a similar case has not been documented. At the first operation, flexor retinaculum release and simple excision of an epineural ganglion were performed without injuring the nerve fascicles; however, an intrafascicular ganglion developed approximately 2 years later...
January 7, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
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