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Topic: Endosteum

In the News (Thu 31 Dec 09)

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	Asian Association of Oral and Maxillofacial Surgeons
		After a latency period of 3 days, bone lengthening was started at a rate of 1 mm per day for 10 days, after which the newly formed bone was allowed to consolidate for 6 weeks with the device serving as an external fixator.
		It could be stated that the periosteum and endosteum are probably not indispensable or particularly important for adequate callus formation.
		However the instability of the segment caused by the slow maturation and remodelling of the newly formed bone in groups P and E should be noted, and a longer consolidation period is recommended to avoid instability of the regenerated segment in such cases.
	www.asianaoms.org /TOC/v16n1p21.htm (465 words)

	Bone Tissue
		A thinner layer of connective tissue, known as the endosteum, surrounds the bone marrow spaces and trabeculae of spongy bone.
		The periosteum and endosteum are a source of new bone-forming cells (osteoprogenitor cells) and are described as possessing osteogenic potential.
		The flat bones or "membrane" bones of the skull are composed in a sandwich-like fashion of an outer layer of compact bone (outer table), a middle layer of spongy bone (diploe), and an inner layer of compact bone (inner table).
	www.technion.ac.il /~mdcourse/274203/lect5.html (3128 words)

	Tendon threader for endosteal ligament mounting - Patent 5266075
		A tendon threader and process for its use for positioning and endosteally mounting a tendon within the endosteum of a closed tunnel end of a straight ligament tunnel that has been formed in a patient's knee in an arthroscopic surgical procedure for replacement of a cruciate ligament.
		The straight ligament tunnel 33 is shown formed from an opening 30 at the tibial tuberosity of the proximal tibia 31, passing through the anterior cruciate ligament points of origin in the knee joint and into the distal femur 32, and terminates in the femur endosteum at 34.
		Prior to which staple mounting, a desired tensile force is applied to the tendon 17 that is anchored by the pin 21 in the femur endosteum.
	www.freepatentsonline.com /5266075.html (2734 words)

	Introduction
		The extreme hardness of bone is attributed to a complex mineral substance, largely composed of calcium, phosphate, and carbonate, distributed throughout a soft organic matrix.
		The surfaces of bone are covered with layers of connective tissue which are called periosteum and endosteum.
		Periosteum is found on the external surfaces and endosteum is found on the internal surfaces of bone.
	bioe.eng.utoledo.edu /adms_staffs/akkus/2003_WEB_PROJECTS/hormone/Introduction.htm (941 words)

	BoneHisto
		For this reason, special attention is given to the periosteum and endosteum during surgery.
		The endosteum has the same components as the periosteum and nearly the same structure, but it is considerably thinner, and does not have two layers as the periosteum does.
		The periosteum and endosteum around the fracture respond with intense proliferation of their fibroblasts and other undifferentiated cells which form a cellular tissue surrounding the fracture, and penetrate between the extremities of the fractured bone.
	www.etsu.edu /cpah/hsci/forsman/BoneHisto.htm (1600 words)

	eMedicine - Histology of Bone : Article by Yi Jun Yang, MD, PhD
		In flat bones, compact bone is formed at both the internal and external surfaces due to a marked predominance of bone deposition over bone resorption, while a spongy pattern remains in the central portion.
		The endosteum and periosteum are formed from layers of connective tissue that are not undergoing ossification.
		The endosteum is composed of osteoprogenitor cells and only a small amount of connective tissue, covering the surface of bone trabeculae and the medullary surface of cortical bone and Haversian canals.
	www.emedicine.com /orthoped/topic403.htm (4913 words)

	www.osteon.spb.ru - Фундаментальная и клиническая остеология (Site not responding. Last check: 2007-10-25)
		Basing on the literature data analysis, modern notions concerning endosteum structure, its connections with the bone and bone marrow are presented.
		Participation of the endosteum in processes of osteogenesis and resorption, as well as its changes with ageing are discussed.
		The role of LCS as a component of the microcirculatory bed of the lamellar bone is discussed.
	www.osteon.spb.ru /morf1989-1985g.php (570 words)

	[No title]
		(Periosteum is essentially the bone’s epimysium —deep fascia of the bone.) Endosteum is the connective tissue that lines the surface of bony spicules.
		(Endosteum of the vertebra lines the trabecular spongy bone.
		Likewise, the endosteum of the skull line the diploe.) The brain has many ridges, which are analogous to the ventral median fissure of the spinal cord.
	www.uhmc.sunysb.edu /som/students/2003/Lectures/body17.doc (1527 words)

	Titanium implants in rabbit femur
		In the cortical bone, the presence of a necrotic area was observed which was later remodelled, and also an intense proliferation of endosteum and periosteum in the regions next to the implant, resulting in a thickening of the cortical bone surface close to the implant.
		In several specimens, such neoformation was very advanced, with apposition of neoformed bone and a consequent increase in the thickness of the cortical bone in contact with the implant.
		In this experiment, the whole necrotic area observed in the cortical bone facing the implant seems to remain initially intact, perhaps confirming the idea that this bone sequestrum works as a structure that initially maintains the implant in position and then works as a base for neoformed bone tissue (Roberts, 1988; Roberts et al., 1989).
	www.forp.usp.br /bdj/t0782.html (2459 words)

	Blue Histology - Skeletal Tissues - Bone
		A thin layer of cell-rich connective tissue, the endosteum, lines the surface of the bone facing the marrow cavity.
		Immediately beneath the periosteum and endosteum a few lamella are found which run parallel to the inner and outer surfaces of the bone.
		Vessels in Volkmann's canals communicate with vessels in the Haversian canals on the one hand and vessels in the endosteum on the other.
	www.lab.anhb.uwa.edu.au /mb140/CorePages/Bone/Bone.htm (2945 words)

	Conn Tissue 28-31 (Site not responding. Last check: 2007-10-25)
		Identify the: endosteum, periosteum, inner and outer circumferential lamellae, interstitial lamellae, and the concentric lamellae of Haversian systems (osteons) (HA2).
		The endosteum is found on the marrow side of the compact bone and the periosteum is on the outside.
		The vessels within the Volkmann’s canal forms several branches that travel longitudinally through the bone in Haversian canals.
	www.histology.wisc.edu /histo/res/desc/ct/ctD28-31.htm (283 words)

	Sindbis-Group Alphavirus Replication in Periosteum and Endosteum of Long Bones in Adult Mice -- Heise et al. 74 (19): ...
		Sindbis-Group Alphavirus Replication in Periosteum and Endosteum of Long Bones in Adult Mice -- Heise et al.
		was observed in the endosteum within the epiphyses of the long
		Following sacrifice, mice were perfused with 4% paraformaldehyde, and hind limbs were decalcified before preparation of frozen sections.
	jvi.asm.org /cgi/content/full/74/19/9294 (3768 words)

	bone cuts
		Diaphysis: The diaphysis is the central shaft of the bone.
		It is in this area that the periosteum, endosteum and medullary cavity are located.
		Endosteum: The endosteum is the membrane which lines the medullary cavity.
	members.aol.com /SVG2253/bonecuts.htm (1757 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		Originates from blood Overall balance of activity of #1 & #3 determines bone density Fibroblasts of endosteum & periosteum G.
		Childhood - Growth hormone - Thyroid hormone - Calcitonin: decreases blood Ca++ - Parathyroid hormone (PTH): raises blood Ca++ - Sex hormones: growth spurts & growth termination as bone outgrows cartilage at epiphyseal plates - Blood levels of Ca++ - Too high: Nerve/muscle unresponsive - Too low: convulsions b.
		Adulthood: calcitonin less important; PTH still active; aids in retrieving Ca++ from bone, gut & urine Bone forming unit (BFU): group of cells in local area of the endosteum that begin breakdown and repair a local area of bone I.
	science.tjc.edu /Course/BIOLOGY/lsch/lsch2401/SaladinCH7.doc (556 words)

	Cartilage and Bone
		Slide 239: hyaline cartilage on articular surfaces of the joints; perichondrium; synovial membrane; bone matrix is eosinophilic; cancellous and compact bone; osteoblasts; osteoid; lacunae; osteocytes, osteoclasts; canaliculi; Volkmann’s canal; periosteum; endosteum; osteoprogenitor cells; growth at epiphyseal region; primary spongiosa; secondary spongiosa
		UT Slide 104: elastic cartilage in the epiglottis; osteoblasts; osteoid; lacunae; osteocytes, osteoclasts
		Slide 16: perichondrium; progenitor cells differentiate into chondrocytes; bone matrix is eosinophilic; cancellous and compact bone; osteoblasts; osteoid; lacunae; osteocytes, osteoclasts; canaliculi; Volkmann’s canal; periosteum; endosteum; osteoprogenitor cells; growth at epiphyseal region; primary spongiosa; secondary spongiosa
	www.cvm.tamu.edu /johnsonslab/data/HistoLabs/CartilageandBone.html (177 words)

	Slide # 103 - Compact Bone - Endosteum (Site not responding. Last check: 2007-10-25)
		Slide # 103 - Compact Bone - Endosteum
		Medium magnification view of the inner surface of the diaphysis showing areas of compact bone (CB) with longitudinal osteon canal (OC) and lateral Volkmann's canal (VC).
		The inner surface of this bony surface is covered by a layer of endosteum (EO) - osteoprogenitor cells.
	www.anatomy.dal.ca /Human_Histology/Lab6/103LM2.html (60 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #4620890 - ESTIMATION OF ABSORBED DOSE RATES IN THE ENDOSTEUM AND BONE MARROW OF VERTEBRAE CONTAMINATED BY $beta$$sup -$ EMITTING BONE SEEKERS.
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		ESTIMATION OF ABSORBED DOSE RATES IN THE ENDOSTEUM AND BONE MARROW OF VERTEBRAE CONTAMINATED BY $beta$$sup -$ EMITTING BONE SEEKERS.
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=4620890 (131 words)

	endosteum - English-French Dictionary - WordReference.com
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		Look for a definition in our English Dictionary.
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	www.wordreference.com /enfr/endosteum (57 words)

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