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https://www.readbyqxmd.com/read/28096061/connexin37-deficiency-alters-organic-bone-matrix-cortical-bone-geometry-and-increases-wnt-%C3%AE-catenin-signaling
#1
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 13, 2017: Bone
https://www.readbyqxmd.com/read/28092776/periosteum-tissue-engineering-in-an-orthotopic-in%C3%A2-vivo-platform
#2
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...
November 20, 2016: 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
#3
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
https://www.readbyqxmd.com/read/28070625/a-study-of-radiological-features-of-healing-in-long-bone-fractures-among-infants-less-than-a-year
#4
Christopher Warner, Sabine Maguire, Laszlo Trefan, Angie Miller, Jason Weinman, Michael Fadell
PURPOSE: To create a timetable for dating long bone fractures in infants aged less than 1 year using previously defined radiographic signs of fracture healing. MATERIALS AND METHODS: A retrospective cross-sectional time series of long bone fractures in infants aged less than 1 year was conducted from 2006 to 2013. After exclusion criteria were applied 59 digital image series were available for review from 40 infants. Utilizing published criteria for dating fractures, the presence or absence of four pre-defined features of healing was scored: periosteal reaction, callus, bridging, and remodeling...
January 10, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28070593/-morphological-investigations-of-deep-sole-ulcers-in-cattle-part-1-the-complicated-rusterholz-ulcer
#5
Susanne Gehringer, Matthias Müller, Johann Maierl
OBJECTIVE: In the context of a larger study on morphological changes of deep sole ulcers, claws with Rusterholz ulcer (RU) were investigated to describe the varied pathological changes of the RU. MATERIAL AND METHODS: Hind limbs of 55 cows displaying external signs of complicated sole ulcers were examined externally and internally. To examine the samples internally, a sagittal section was performed. Furthermore, the material was examined histologically and after bone maceration...
January 10, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28067429/lnk-deficiency-leads-to-tpo-mediated-osteoclastogenesis-and-increased-bone-mass-phenotype
#6
David J Olivos, Marta Alvarez, Ying-Hua Cheng, R Adam Hooker, Wendy A Ciovacco, Monique Bethel, Haley McGough, Christopher Yim, Brahmananda R Chitteti, Pierre P Eleniste, Mark C Horowitz, Edward F Srour, Angela Bruzzaniti, Robyn K Fuchs, Melissa A Kacena
The Lnk adapter protein negatively regulates the signaling of thrombopoietin (TPO), the main megakaryocyte (MK) growth factor. Lnk-deficient (-/-) mice have increased TPO signaling and increased MK number. Interestingly, several mouse models exist in which increased MK number leads to a high bone mass phenotype. Here we report the bone phenotype of these mice. MicroCT and static histomorphometric analyses at 20 weeks showed the distal femur of Lnk(-/-) mice to have significantly higher bone volume fraction and trabecular number compared to wild-type (WT) mice...
January 9, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28050514/unusually-large-peripheral-osteoma-of-the-mandible-a-rare-case-report
#7
Pulkit Khandelwal, Vikas Dhupar, Francis Akkara
Osteoma is a benign tumor which is composed of mature compact or cancellous bone. Osteoma may be periosteal (arising from surface of the bone) or endosteal (develop in the medullary bone) or combination of both. Here, we present a case of unusually large osteoma present on the lingual surface of the mandible in a 40-year-old female patient. The lesion had grown slowly for 15 years and caused intra-oral swelling leading to difficulty in mastication, speech and tongue movements. Under general anesthesia, local complete surgical excision was performed...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28043849/clavicle-fractures
#8
REVIEW
M Ropars, H Thomazeau, D Huten
Management of clavicle fracture has progressed over the last decade, notably with wider use of surgery in midshaft fracture, and new techniques for lateral fracture. Midshaft clavicle fracture treatment needs to be personalized and adapted to the patient's activity level. Whichever the segment involved, treatment for non-displaced fracture is functional; elbow-to-body sling immobilization seems the best tolerated. Apart from regular surgical indications (shoulder impaction, floating shoulder, open fracture or fracture with neurovascular complications), surgery is recommended in case of bone shortening exceeding 1...
December 30, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28032166/periorbital-and-intraorbital-studies-of-the-terminal-branches-of-the-ophthalmic-artery-for-periorbital-and-glabellar-filler-placements
#9
Tanvaa Tansatit, Prawit Apinuntrum, Thavorn Phetudom
BACKGROUND: Filler injections for sunken upper eyelid correction and glabellar augmentation at the orbitoglabellar region need to be performed correctly. Precise knowledge of the emerging sites of all terminal branches of the ophthalmic artery is essential for these procedures to be conducted safely. METHODS: The terminal branches of the ophthalmic artery were studied in both periorbital and intraorbital dissections. The aim of this study was to verify the critical positions of the emerging sites at the orbital septum that may act as potential retrograde channels for filler emboli...
December 28, 2016: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28031516/review-article-osteophytes
#10
Siu Him Janus Wong, Kwong Yuen Chiu, Chun Hoi Yan
An osteophyte is a fibrocartilage-capped bony outgrowth that is one of the features of osteoarthritis. This study reviewed the types, risk factors, pathophysiology, clinical presentations, and medical and surgical treatment of osteophytes. Extraspinal osteophytes are classified as marginal, central, periosteal, or capsular, whereas vertebral osteophytes are classified as traction or claw. Risk factors for development of osteophytes include age, body mass index, physical activity, and other genetic and environmental factors...
December 2016: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28005799/clinical-characteristics-and-treatment-of-osteopetrosis-complicated-by-osteomyelitis-of-the-mandible
#11
Hai-Jiang Sun, Lei Xue, Chuan-Bin Wu, Qing Zhou
Osteopetrosis represents a heterogeneous group of rare, hereditary bone disorders with variable clinical features, and an increase in bone density. Osteomyelitis of the jaws is a significant complication of osteopetrosis. In this article, a reported patient with osteopetrosis complicated by osteomyelitis of the mandible was examined. The patient was treated with intravenous antibiotic therapy, debridement of necrotic bone and hyperbaric oxygen therapy; in addition, the authors attempted to implant the calcium sulfate and vancomycin to reconstruct the bone defect...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28005787/nasopalatine-island-advancement-flap
#12
Amin Rahpeyma, Saeedeh Khajehahmadi
BACKGROUND: Anterior maxilla is a high esthetic region of the mouth. Some flaps are introduced for bone graft coverage, mainly based on secondary epithelization of connective tissue-periosteal tissues. This article evaluates the versatility of a new mucoperiosteal flap for reproducible coverage in anterior maxilla. METHODS: In 5 mongrel dogs a 5 mm width mucosal defect in labial mucosa was created after extraction of upper jaw incisors. Nasopalatine island advancement flap was used for mucosal replacement...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28005765/functional-reconstruction-in-mandibular-avulsion-injuries
#13
Yoav Leiser, Dekel Shilo, Amir Wolff, Adi Rachmiel
The present report describes the planning and surgery as well as pitfalls and management of a patient with a near total mandibular avulsion injury that was rehabilitated using three-dimensional (3D) laser printing of a titanium lower jaw. Laser-sintering involves zapping layers of powdered metal to recreate a 3D implantable skeletal defect. The process involves using either mirror imaging of the unaffected side or using archival image database of healthy individuals. A 25-year-old man presented with a gunshot injury that left him with a near total avulsed mandible...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28005755/management-of-zygomatic-fractures-in-young-patients-technical-modifications-for-aesthetic-and-functional-results
#14
Antonio Cortese, Giuseppe D'Alessio, Sergio Brongo, Maurizio Gargiulo, Pier Paolo Claudio
INTRODUCTION: The zygomaticomaxillary complex is very vulnerable to injury because of its intrinsically prominent convexity. There are 2 different surgical approaches for the therapy of these fractures: closed reduction and open reduction. In the open reduction 2 or 3 fixation points with related incisions are usually necessary in dislocated fractures: osteosynthesis must be performed starting from zygomaticofrontal suture when dislocated at this site, followed by zygomatic body fixation on the anterior sinus wall, anterior orbital floor margin fixation, and finally orbital floor reconstruction in case of eye globe dislocation with diplopia...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28005628/effective-technique-for-periosteal-removal-during-mohs-micrographic-surgery
#15
Kachiu C Lee, Erich Karasko, Raymond Dufresne, Harold William Higgins
No abstract text is available yet for this article.
December 21, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28002343/florid-reactive-periostitis-in-the-fifth-phalange-of-a-professional-boxer-a-case-report
#16
Yuji Tomori, Ryuji Ohashi, Zenya Naito, Mitsuhiko Nanno, Shinro Takai
RATIONALE: Florid reactive periostitis is a rare, benign bone and chondrogenic lesion that develops most frequently in the phalanges of the hands. Although the definitive cause of florid reactive periostitis is unknown, the major inciting factor is generally considered to be trauma, including repetitive minor trauma. PATIENT CONCERNS: We present a case of florid reactive periostitis affecting two contiguous phalangeal bones of the left fifth phalange of a 23-year-old male professional boxer...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28001453/insulin-resistance-is-associated-with-smaller-cortical-bone-size-in-non-diabetic-men-at-the-age-of-peak-bone-mass
#17
Charlotte Verroken, Hans-Georg Zmierczak, Stefan Goemaere, Jean-Marc Kaufman, Bruno Lapauw
CONTEXT: In type 2 diabetes mellitus, fracture risk is increased despite preserved areal bone mineral density. Although this apparent paradox may in part be explained by insulin resistance affecting bone structure and/or material properties, few studies have investigated the association between insulin resistance and bone geometry. OBJECTIVE: We aimed to explore this association in a cohort of non-diabetic men at the age of peak bone mass. DESIGN, SETTING AND PARTICIPANTS: 996 non-diabetic men aged 25-45 years were recruited in a cross-sectional, population-based sibling-pair study at a university research center...
December 21, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27999894/tomography-based-quantification-of-regional-differences-in-cortical-bone-surface-remodeling-and-mechano-response
#18
Annette I Birkhold, Hajar Razi, Georg N Duda, Sara Checa, Bettina M Willie
Bone has an adaptive capacity to maintain structural integrity. However, there seems to be a heterogeneous cortical (re)modeling response to loading at different regions within the same bone, which may lead to inconsistent findings since most studies analyze only one region. It remains unclear if the local mechanical environment is responsible for this heterogeneous response and whether both formation and resorption are affected. Thus, we compared the formation and resorptive response to in vivo loading and the strain environment at two commonly analyzed regions in the mouse tibia, the mid-diaphysis and proximal metaphysis...
December 20, 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/27997077/bone-microstructure-of-pareiasaurs-parareptilia-from-the-karoo-basin-south-africa-implications-for-growth-strategies-and-lifestyle-habits
#19
Aurore Canoville, Anusuya Chinsamy
Numerous morphological studies have been carried out on pareiasaurs; yet their taxonomy and biology remain incompletely understood. Earlier works have suggested that these herbivorous parareptiles had a short juvenile period as compared to the duration of adulthood. Several studies further suggested an (semi-) aquatic lifestyle for these animals, but more recent investigations have proposed a rather terrestrial habitat. Bone paleohistology is regarded as a powerful tool to assess aspects of tetrapod paleobiology, but few studies have been conducted on pareiasaurs...
December 20, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/27990445/voriconazole-induced-periostitis-enthesopathy-in-solid-organ-transplant-patients-case-reports
#20
Monica Sircar, Camille Kotton, David Wojciechowski, Kassem Safa, Hannah Gilligan, Eliot Heher, Winfred Williams, Ravi Thadhani, Nina Tolkoff-Rubin
BACKGROUND: Voriconazole is frequently used to treat fungal infections in solid organ transplant patients. Recently, there have been reports suggesting that prolonged voriconazole therapy may lead to periostitis. AIM: Here we present two cases of voriconazole-induced periostitis in solid organ transplant patients. CASE PRESENTATION: Voriconazole was given to two transplant patients-one with a liver transplant and the second with a heart transplant, to treat their fungal infections...
November 2016: Journal of biosciences and medicines
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