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https://www.readbyqxmd.com/read/29783279/bone-area-histomorphometry
#1
Janna M Andronowski, Christian Crowder
Quantifying the amount of cortical bone loss is one variable used in histological methods of adult age estimation. Measurements of cortical area tend to be subjective and additional information regarding bone loss is not captured considering cancellous bone is disregarded. We describe whether measuring bone area (cancellous + cortical area) rather than cortical area may improve histological age estimation for the sixth rib. Mid-shaft rib cross-sections (n = 114) with a skewed sex distribution were analyzed...
May 21, 2018: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29782037/multiloculated-solitary-unicameral-bone-cyst-in-a-young-dog
#2
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/29780823/variability-in-ultrasound-backscatter-induced-by-trabecular-microstructure-deterioration-in-cancellous-bone
#3
Xingxing Chou, Feng Xu, Ying Li, Chengcheng Liu, Dean Ta, Lawrence H Le
To determine the relationship between the ultrasonic backscatter parameters and trabecular microstructural variations in cancellous bone, three erosion procedures were performed to simulate various changes in the cancellous bone microstructure. The finite difference time domain (FDTD) method was used to simulate the backscatter signal in cancellous bone. Ultrasonic backscatter properties were derived as functions of the porosity when the ultrasound incident directions were perpendicular and parallel to the major trabeculae direction (MTD), respectively...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29769767/a-comparative-study-on-the-stress-distribution-around-dental-implants-in-three-arch-form-models-for-replacing-six-implants-using-finite-element-analysis
#4
Maryam Zarei, Mahmoud Jahangirnezhad, Hojatollah Yousefimanesh, Maryam Robati, Hossein Robati
Background: Dental implant is a method to replacement of missing teeth. It is important for replacing the missed anterior teeth. In vitro method is a safe method for evaluation of stress distribution. Finite element analysis as an in vitro method evaluated stress distribution around replacement of six maxillary anterior teeth implants in three models of maxillary arch. Materials and Methods: In this in vitro study, using ABAQUS software (Simulia Corporation, Vélizy-Villacoublay, France), implant simulation was performed for reconstruction of six maxillary anterior teeth in three models...
March 2018: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/29761983/-imaging-analysis-of-jaw-defects-reparation-with-antigen-extracted-porcine-cancellous-bone
#5
Xufeng Chen, Lihong Lu, Zhiqiang Feng, Zhongda Yin, Renfa Lai
At present, most of the bone xenograft for clinical application comes from bovine. In recent years, many studies have been done on the clinical application of porcine xenograft bone. The goal of this study was to evaluate the effect of canine mandibular defects reparation with antigen-extracted porcine cancellous bone by imaging examination. Four dogs' bilateral mandibular defects were created, with one side repaired with autologous bone (set as control group) while the other side repaired with antigen-extracted porcine cancellous bone (set as experimental group)...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29761980/-the-biomechanical-study-to-evaluate-tightening-condition-for-ao-lag-screw-depending-on-pull-out-strength-and-interfragmentary-compressive-force
#6
Peidong Sun, Peifeng Jiao, Zhenyu Bi, Jun Ouyang
The aim of this experimental study focused on the relationship between pull-out strength (POS) and interfragmentary compressive force (IFCF) of AO cancellous lag screw during tightening procedure. The 6.5 mm AO cancellous lag screw and synthetic cancellous bone were used for this research. The test contains rotation tests and the subsequent pull-out tests, to record the IFCF and POS under different tightening angle groups. The results of this study demonstrated the specific relationship between IFCF and POS and showed that they didn't reach the peak at the very same time...
December 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29761487/the-phytoestrogen-genistein-prevents-trabecular-bone-loss-and-affects-thyroid-follicular-cells-in-a-male-rat-model-of-osteoporosis
#7
Branko Filipović, Branka Šošić-Jurjević, Vladimir Ajdžanović, Jasmina Živanović, Milica Manojlović-Stojanoski, Nataša Nestorović, Nataša Ristić, Svetlana Trifunović, Verica Milošević
As a major phytoestrogen of soy, genistein effectively prevents bone loss in both humans and rat models of osteoporosis. However, although the bone-sparing effects of genistein are achieved directly through estrogen receptors, its mode of action on bone by modulation of other endocrine functions is not entirely clear. Thus, thyroid hormones and calcitonin (CT) have an essential influence on bone metabolism. Besides its action on bones, in this study we examined the effect of genistein on the activity of two different endocrine cell populations, thyroid follicular and C-cells...
May 14, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29760731/recovery-of-donor-hematopoiesis-after-graft-failure-and-second-hematopoietic-stem-cell-transplantation-with-intraosseous-administration-of-mesenchymal-stromal-cells
#8
Nataliya Petinati, Nina Drize, Natalia Sats, Natalya Risinskaya, Andrey Sudarikov, Michail Drokov, Daria Dubniak, Alina Kraizman, Maria Nareyko, Natalia Popova, Maya Firsova, Larisa Kuzmina, Elena Parovichnikova, Valeriy Savchenko
Multipotent mesenchymal stromal cells (MSCs) participate in the formation of bone marrow niches for hematopoietic stem cells. Donor MSCs can serve as a source of recovery for niches in patients with graft failure (GF) after allogeneic bone marrow (BM) transplantation. Since only few MSCs reach the BM after intravenous injection, MSCs were implanted into the iliac spine. For 8 patients with GF after allo-BMT, another hematopoietic stem cell transplantation with simultaneous implantation of MSCs from their respective donors into cancellous bone was performed...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29751129/selective-inhibition-of-src-family-kinases-by-su6656-increases-bone-mass-by-uncoupling-bone-formation-from-resorption-in-mice
#9
Cyril Thouverey, Serge Ferrari, Joseph Caverzasio
Mice deficient in the non-receptor tyrosine kinase Src exhibit high bone mass due to impaired bone resorption and increased bone formation. Although several Src family kinase inhibitors inhibit bone resorption in vivo, they display variable effects on bone formation. SU6656 is a selective Src family kinase inhibitor with weaker activity towards the non-receptor tyrosine kinase Abl and receptor tyrosine kinases which are required for appropriate osteoblast proliferation, differentiation and function. Therefore, we sought to determine whether SU6656 could increase bone mass by inhibiting bone resorption and by stimulating bone formation, and to explore its mechanisms of action...
May 8, 2018: Bone
https://www.readbyqxmd.com/read/29747395/state-recognition-of-bone-drilling-based-on-acoustic-emission-in-pedicle-screw-operation
#10
Fengqing Guan, Yu Sun, Xiaozhi Qi, Ying Hu, Gang Yu, Jianwei Zhang
Pedicle drilling is an important step in pedicle screw fixation and the most significant challenge in this operation is how to determine a key point in the transition region between cancellous and inner cortical bone. The purpose of this paper is to find a method to achieve the recognition for the key point. After acquiring acoustic emission (AE) signals during the drilling process, this paper proposed a novel frequency distribution-based algorithm (FDB) to analyze the AE signals in the frequency domain after certain processes...
May 9, 2018: Sensors
https://www.readbyqxmd.com/read/29740071/silk-fibroin-micro-particle-scaffolds-with-superior-compression-modulus-and-slow-bioresorption-for-effective-bone-regeneration
#11
Anuya Nisal, Raeesa Sayyad, Prachi Dhavale, Bhakti Khude, Rucha Deshpande, Vidhyashri Mapare, Swati Shukla, Premnath Venugopalan
Silk fibroin (SF), a natural polymer produced by Bombyx mori silkworms, has been extensively explored to prepare porous scaffolds for tissue engineering applications. Here, we demonstrate, a scaffold made of SF, which exhibits compression modulus comparable to natural cancellous bone while retaining the appropriate porosities and interconnected pore architecture. The scaffolds also exhibit high resistance to in-vitro proteolytic degradation due to the dominant beta sheet conformation of the SF protein. Additionally, the scaffolds are prepared using a simple method of microparticle aggregation...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739435/biomechanical-analysis-of-iliac-crest-loading-following-cortico-cancellous-bone-harvesting
#12
Paul Schmitz, Christoph Cornelius Neumann, Carsten Neumann, Michael Nerlich, Sebastian Dendorfer
BACKGROUND: Iliac crest bone harvesting is a frequently performed surgical procedure widely used to treat bone defects. The objective of this study is to assess the biomechanical quantities related to risk for pelvic fracture after harvesting an autologous bone graft at the anterior iliac crest. METHODS: Finite element models with a simulated harvest site (sized 15 × 20 mm, 15 × 35 mm, 30 × 20 mm and 30 × 35 mm) in the iliac wing are created...
May 9, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29739252/evaluation-of-the-rivastigmine-role-against-botulinum-toxin-a-induced-osteoporosis-in-albino-rats-a-biochemical-histological-and-immunohistochemical-study
#13
D M Ali, W Y Abdelzaher, Smn Abdel-Hafez
The present study aimed to evaluate the role of rivastigmine against the effect of a single unilateral botulinum toxin-A (BTX-A) injection on the bone and bone marrow of adult albino rats 4 weeks after injection. Twenty-four Wistar albino rats were divided into four equal groups: group I, which received distilled water; group II, which received rivastigmine (0.3 mg/kg daily, intraperitoneally for 4 weeks); group III, which received BTX-A (4 IU in 0.2 mL physiological saline) single dose, intramuscularly; and group IV, which received BTX-A + rivastigmine...
January 1, 2018: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29736917/use-of-cancellous-bone-grafting-to-promote-granulation-tissue-in-a-distal-limb-wound-in-a-dog
#14
K Barnes, O Lanz, S Barry, K Aulakh
A 5-year-old female spayed Shetland sheepdog presented for evaluation of bandage sores on the left pelvic limb after a splint was placed to stabilise a digit fracture incurred approximately 2 weeks previously. Multiple areas of necrosis were identified upon bandage removal. After debridement of devitalised tissue, a 4 cm wound on the plantar surface of the metatarsal bones (with exposed bone and tendons) remained. The Papineau technique (which involves removal of infected or necrotic tissue, placement of autogenous cancellous bone graft within a wound, and delayed skin closure) was used to treat this wound...
May 7, 2018: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29724158/calcium-infiltrated-biphasic-hydroxyapatite-scaffolds-for-human-hematopoietic-stem-cell-culture
#15
Qinghao Zhang, Joerg C Gerlach, Ian Nettleship, Eva Schmelzer
Long-term in vitro expansion of hematopoietic stem cells while maintaining their functionality and multilineage differentiation potential is still challenging. In this study, three-dimensional high-porosity hydroxyapatite foams have been designed to closely mimic the chemistry and physical structure of cancellous bone. Furthermore, calcium oxide was distributed in the hydroxyapatite ceramics to provide surface calcium ion release, hypothesizing that a local surface calcium gradient supports hematopoietic stem cell localization and maintenance...
May 4, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29704635/plasma-of-argon-enhances-the-adhesion-of-murine-osteoblasts-on-different-graft-materials
#16
Luigi Canullo, Tullio Genova, Nadja Naenni, Yasushi Nakajima, Katsuhiko Masuda, Federico Mussano
OBJECTIVE: plasma of argon treatment was demonstrated to increase material surface energy leading to stronger and faster interaction with cells. The aim of the present in vitro study was to test the effect of plasma treatment on different graft materials. MATERIALS AND METHODS: synthetic hydroxyapatite (Mg-HA), biphasic calcium phosphate (BCP), cancellous and cortical xenogeneic bone matrices (CaBM, CoBM) were used representing commonly used classes of bone substitute materials...
April 25, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29703129/lithium-incorporated-deproteinized-bovine-bone-substitute-improves-osteogenesis-in-critical-sized-bone-defect-repair
#17
Hongzhang Guo, Changde Wang, Jixiang Wang, Yufang He
This study aimed to explore the surface modification of deproteinized bovine bone using lithium-ion and evaluate its efficacy on osteogenesis improvement and critical-sized bone defect repair. Hydrothermal treatment was performed to produce lithium-incorporated deproteinized bovine bone. In vitro study, human osteosarcoma cell MG63 (MG63) was cultured with the bone substitute to evaluate the cell viability and then calcium deposition was measured to analyze the osteogenesis. In vivo studies, male adult goats were chosen to build critical-sized bone defect model and randomly divided into three groups...
May 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29701088/outcome-of-autologous-bone-grafting-with-preservation-of-articular-cartilage-to-treat-osteochondral-lesions-of-the-talus-with-large-associated-subchondral-cysts
#18
M Sawa, T Nakasa, Y Ikuta, M Yoshikawa, Y Tsuyuguchi, M Kanemitsu, Y Ota, N Adachi
Aims The aim of this study was to evaluate antegrade autologous bone grafting with the preservation of articular cartilage in the treatment of symptomatic osteochondral lesions of the talus with subchondral cysts. Patients and Methods The study involved seven men and five women; their mean age was 35.9 years (14 to 70). All lesions included full-thickness articular cartilage extending through subchondral bone and were associated with subchondral cysts. Medial lesions were exposed through an oblique medial malleolar osteotomy, and one lateral lesion was exposed by expanding an anterolateral arthroscopic portal...
May 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29691833/commercial-products-for-osteochondral-tissue-repair-and-regeneration
#19
Diana Bicho, Sandra Pina, Rui L Reis, J Miguel Oliveira
The osteochondral tissue represents a complex structure composed of four interconnected structures, namely hyaline cartilage, a thin layer of calcified cartilage, subchondral bone, and cancellous bone. Due to the several difficulties associated with its repair and regeneration, researchers have developed several studies aiming to restore the native tissue, some of which had led to tissue-engineered commercial products. In this sense, this chapter discusses the good manufacturing practices, regulatory medical conditions and challenges on clinical translations that should be fulfilled regarding the safety and efficacy of the new commercialized products...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29682254/stress-distribution-of-various-designs-of-prostheses-on-short-implants-or-standard-implants-in-posterior-maxilla-a-three-dimensional-finite-element-analysis
#20
K Jomjunyong, P Rungsiyakull, C Rungsiyakull, W Aunmeungtong, M Chantaramungkorn, P Khongkhunthian
Introduction: Although many previous studies have reported on the high success rate of short dental implants, prosthetic design still plays an important role in the long-term implant treatment results. This study aims to evaluate stress distribution characteristics involved with various prosthetic designs on standard implants or short implants in the posterior maxilla. Materials and methods: Six finite element models were simulated representing the missing first and second maxillary molars...
October 2017: Oral & Implantology
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