Abstract:
:Cortical bone can be modeled as a complex hierarchical composite interrelating both structure and material properties on four levels of structural organization: molecular, ultrastructural, microscopic, and macroscopic. In young animals, the microstructural systems are long parallel lamellar units, plexiform bone, which in older or more mature animals converts by internal remodeling into multiple concentric lamellar units, secondary osteons, forming haversian bone. Ultrasonic wave propagation measurements performed on both plexiform and haversian bone clearly show a definitive relationship with microstructure; haversian bone can be described as a transversely symmetric material whereas plexiform bone appears to be orthotropic in nature. The anisotropy of the elastic constants are found to reflect the tissue symmetry; moreover, plexiform bone is stiffer and more rigid in all directions than is haversian bone. Similar experiments were performed on osteoporotic and osteopetrotic bone. While the results for osteoporotic bone are understandable in terms of the increased porosity, the results for the osteopetrotic bone are anomalous with respect to its density. Since Wolff, the remodeling of bone has been interpreted as a way of altering the mechanical properties to suit some need. For haversian remodeling from plexiform bone, the argument that adaptation occurs to optimize properties requires additional clarification since haversian bone appears to have inferior mechanical properties to plexiform bone.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Katz JL,Yoon HS,Lipson S,Maharidge R,Meunier A,Christel Pdoi
10.1007/BF02406131subject
Has Abstractpub_date
1984-01-01 00:00:00pages
S31-6eissn
0171-967Xissn
1432-0827journal_volume
36 Suppl 1pub_type
杂志文章abstract::N-acetyl-beta-D-glucosaminidase (NAG) is a lysosomal enzyme predominantly located in renal proximal tubules. In idiopathic hypoparathyroidism (IHP), 100 Units of human PTH (1-34) increased urinary excretion of NAG from 0.029 +/- 0.027 to 0.173 +/- 0.035 U/lGF (p less than 0.05) in two patients before treatment and fro...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02556010
更新日期:1989-12-01 00:00:00
abstract::The prevalence rates of ossification of the posterior longitudinal ligament (OPLL) in the Korean population were reported as 3.4 and 0.6%. However, these studies were performed before the era of three-dimensional computed tomography (3D CT). We investigated the prevalence of cervical OPLL on the basis of 3D CT and fea...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-014-9846-7
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-006-0008-4
更新日期:2006-09-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-020-00756-6
更新日期:2020-12-01 00:00:00
abstract::The purpose of this study was to estimate clinical validity of a new available immunoradiometric assay for circulating intact human BGP (N-tact Osteo SP) by measuring this protein in a large number of normal subjects and patients with the most common metabolic bone diseases. One hundred normal subjects were studied in...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/pl00005815
更新日期:1999-05-01 00:00:00
abstract::Regular tennis play is associated with impressive asymmetries in bone strength in favor of the racquet arm, particularly in the humerus. However, the relative effects of service and ground strokes are not known. Serendipitously, we encountered a 46-year-old regular tennis player who has played service and ground strok...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-015-9995-3
更新日期:2015-08-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02556157
更新日期:1991-05-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900410
更新日期:1998-02-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02405386
更新日期:1984-12-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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更新日期:1996-11-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-008-9124-7
更新日期:2008-04-01 00:00:00
abstract::To evaluate the associations of sarcopenia and previous falls with 2-year major osteoporotic fractures (MOFs) in community-dwelling older adults. Four thousand Chinese men and women ≥ 65 years recruited from Hong Kong communities were prospectively followed up. Measures of muscle mass, grip strength, gait speed and fa...
journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-020-00709-z
更新日期:2020-08-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-010-9406-8
更新日期:2010-10-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900213
更新日期:1997-02-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223001093
更新日期:2000-07-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-018-0452-y
更新日期:2018-11-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900692
更新日期:1999-09-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02555127
更新日期:1987-07-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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journal_title:Calcified tissue international
pub_type: 杂志文章
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journal_title:Calcified tissue international
pub_type: 杂志文章
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更新日期:1980-01-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s00223-004-0275-x
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/s002239900728
更新日期:1999-12-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02508638
更新日期:1996-04-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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更新日期:1994-10-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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journal_title:Calcified tissue international
pub_type: 杂志文章
doi:10.1007/BF02561408
更新日期:1989-08-01 00:00:00
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journal_title:Calcified tissue international
pub_type: 杂志文章
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