scholarly journals Interrelationships between Morphometric, Densitometric, and Mechanical Properties of Mandible in 6-month-old Male Pigs

2012 ◽  
Vol 56 (2) ◽  
pp. 177-181 ◽  
Author(s):  
Barbara Tymczyna ◽  
Teresa Bachanek ◽  
Marcin R. Tatara ◽  
Witold Krupski ◽  
Monika Tymczyna-Sobotka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Body Weight ◽  
Bone Mineral ◽  
Bending Test ◽  
Morphological Properties ◽  
Volumetric Bone Mineral Density ◽  
Mineral Density ◽  
Final Body Weight ◽  
Mandible Length

Abstract The aim of the study was to evaluate interrelationships between final body weight, and morphometric, densitometric, and mechanical properties of the mandible in 6-month-old Polish Large White pigs exposed to dexamethasone and nanocalcium. The study was performed on 27 males, castrated on the 28th d after weaning, and reared until the age of 6 months, after which the animals were slaughtered, and the mandible was obtained. The pigs were divided into four experimental groups: animals given per os nanopartical calcium, animals injected with dexamethasone, animals given both nanopartical calcium per os and dexamethasone injections, and animals injected with placebo. After the slaughter, morphological properties of the mandible such as bone weight and length were determined. Using computed tomography technique, volumetric bone mineral density (vBMD) of the cortical bone (Cd), mean volumetric bone mineral density (MvBMD), and total bone volume (Bvol) of whole mandible were measured. Areal bone mineral density (BMD) and bone mineral content were evaluated with the use of dual-energy X-ray absorptiometric method. Using three-point bending test, mechanical parameters such as maximum elastic strength (Wy) and ultimate strength (Wf) of mandible were estimated. Pearson’s correlation coefficient (r) was determined between all the investigated variables. The obtained results showed a significantly positive correlation between body weight and mandible weight, mandible length, Bvol, Cd, BMD, BMC, Wy, and Wf. However, statistically insignificant correlations of MvBMD and body weight, mandible weight, mandible length, and Bvol were observed. Furthermore, Bvol and Cd were not found to be significantly correlated. In conclusion, this study showed numerous positive correlations between final body weight and densitometric, morphometric, and mechanical properties of the mandible. This bone of pigs may be used as an attractive model for further investigation on metabolic response of the skeleton to physiological, nutritional, toxicological, and pharmacological factors influencing bone tissue metabolism.

Effects of short-term glucocorticoid administration on bone mineral density, biomechanics and microstructure in rats’ femur

2016 ◽  
Vol 36 (3) ◽  
pp. 287-294 ◽  
Author(s):  
Y Chen ◽  
L Huang ◽  
J Zhu ◽  
K Wu
Keyword(s):  
Bone Mineral Density ◽  
Body Weight ◽  
Bone Mineral ◽  
Body Weight Gain ◽  
Bending Test ◽  
Whole Body ◽  
Control Group ◽  
Mineral Density ◽  
Short Term ◽  
Trabecular Thickness

The effects of short-term use of oral glucocorticoid (GC) on the skeleton are not well defined. To address this gap, the influences of 7 days, 21 days of GC administration on femurs of intact rats were investigated. Forty 4-month-old female Sprague–Dawley rats were randomly divided into control group (Cont) and prednisone-treated group (Pre) and administered either distilled water or prednisone acetate at doses of 3.5 mg/kg/day for 0, 7 and 21 days, respectively. All the femurs were harvested for dual-energy X-ray absorptiometry scan, biomechanical testing and micro computed tomography scan. The whole body weight, femur bone mineral density (BMD), all three-point bending test parameters, microstructural parameters increased or improved significantly in Cont at day 21 when compared to day 0. The whole body weight, distal femur BMD, Young’s modulus, bending stiffness, density of tissue volume and trabecular thickness (Tb.Th) decreased, while structure model index and trabecular separation (Tb.Sp) increased significantly in Pre at day 21 when compared to age-matched control but had no significant differences between day 7 and day 21. Our data demonstrate that 7-day use of prednisone does not influence on rats’ femur, and 21-day use of prednisone slows in rate of whole body weight gain, decreases femur metaphysis BMD and bone stiffness which mainly due to the deteriorated bone microstructure.

Bone mineral density: correlation with body weight, height, bone age and insulin-like growth factor

1997 ◽  
Vol 73 (4) ◽  
Author(s):  
José Hugo L. Pessoa ◽  
Shlomo Lewin ◽  
Carlos A. Longui ◽  
Berenice B. Mendonça
Keyword(s):  
Bone Mineral Density ◽  
Body Weight ◽  
Growth Factor ◽  
Bone Mineral ◽  
Bone Age ◽  
Insulin Like Growth Factor ◽  
Mineral Density ◽  
Density Correlation

scholarly journals The Association of Lumbar Disc Herniation with Lumbar Volumetric Bone Mineral Density in a Cross-Sectional Chinese Study

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 938
Author(s):  
Jian Geng ◽  
Ling Wang ◽  
Qing Li ◽  
Pengju Huang ◽  
Yandong Liu ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Lumbar Disc Herniation ◽  
Disc Herniation ◽  
Lumbar Disc ◽  
Magnetic Resonance Images ◽  
Volumetric Bone Mineral Density ◽  
Mineral Density ◽  
Men And Women ◽  
The Relationship

Little is known about the effect of lumbar intervertebral disc herniation (LDH) on lumbar bone mineral density (BMD), and few previous studies have used quantitative computed tomography (QCT) to assess whether the staging of LDH correlates with lumbar vertebral trabecular volumetric bone mineral density (Trab.vBMD). To explore the relationship between lumbar Trab.vBMD and LDH, seven hundred and fifty-four healthy participants aged 20–60 years were enrolled in the study from an ongoing study on the degeneration of the spine and knee between June 2014 and 2017. QCT was used to measure L2–4 Trab.vBMD and lumbar spine magnetic resonance images (MRI) were performed to assess the incidence of disc herniation. After 9 exclusions, a total of 322 men and 423 women remained. The men and women were divided into younger (age 20–39 years) and older (age 40–60 years) groups and further into those without LDH, with a single LDH segment, and with ≥2 segments. Covariance analysis was used to adjust for the effects of age, BMI, waistline, and hipline on the relationship between Trab.vBMD and LDH. Forty-one younger men (25.0%) and 59 older men (37.3%) had at least one LDH segment. Amongst the women, the numbers were 46 (22.5%) and 80 (36.4%), respectively. Although there were differences in the characteristics data between men and women, the difference in Trab.vBMD between those without LDH and those with single and ≥2 segments was not statistically significant (p > 0.05). These results remained not statistically significant after further adjusting for covariates (p > 0.05). No associations between lumbar disc herniation and vertebral trabecular volumetric bone mineral density were observed in either men or women.

Ischemic heart disease is associated with lower cortical volumetric bone mineral density of distal radius

2015 ◽  
Vol 26 (7) ◽  
pp. 1893-1901 ◽  
Author(s):  
J. Paccou ◽  
M. H. Edwards ◽  
K. A. Ward ◽  
K. A. Jameson ◽  
C. L. Moss ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Heart Disease ◽  
Ischemic Heart Disease ◽  
Distal Radius ◽  
Bone Mineral ◽  
Ischemic Heart ◽  
Volumetric Bone Mineral Density ◽  
Mineral Density

scholarly journals Volumetric bone mineral density at the spine and hip in Chinese American and White women

2011 ◽  
Vol 23 (10) ◽  
pp. 2499-2506 ◽  
Author(s):  
M. D. Walker ◽  
I. Saeed ◽  
D. J. McMahon ◽  
J. Udesky ◽  
G. Liu ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
White Women ◽  
Chinese American ◽  
Volumetric Bone Mineral Density ◽  
Mineral Density

scholarly journals Jumping exercise preserves bone mineral density and mechanical properties in osteopenic ovariectomized rats even following established osteopenia

2017 ◽  
Vol 28 (4) ◽  
pp. 1461-1471 ◽  
Author(s):  
R . Okubo ◽  
L. S. Sanada ◽  
V. A. Castania ◽  
M. J. Q. Louzada ◽  
F. J. A. de Paula ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Mineral Density ◽  
Bone Mineral ◽  
Ovariectomized Rats ◽  
Mineral Density ◽  
Jumping Exercise

scholarly journals Differences in volumetric bone mineral density (vBMD) at the radius and tibia in premenopausal Caucasian and Asian women

Bone ◽  
2011 ◽  
Vol 48 ◽  
pp. S269-S270
Author(s):  
O. Hakim ◽  
A. Darling ◽  
K. Hart ◽  
J. Berry ◽  
S. Lanham-New
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Asian Women ◽  
Volumetric Bone Mineral Density ◽  
Mineral Density

scholarly journals RELATIONSHIP BETWEEN TRAINING VOLUME AND BONE MINERAL DENSITY CHANGES IN ELDERLY WOMEN

2016 ◽  
Vol 22 (3) ◽  
pp. 231-234
Author(s):  
Juan José Rábade Espinosa ◽  
Teresa Valverde Esteve ◽  
Ana Pablos Monzó ◽  
Carlos Pablos Abella ◽  
Vicente Carratalá Deval
Keyword(s):  
Physical Activity ◽  
Bone Mineral Density ◽  
Body Weight ◽  
Bone Mineral ◽  
Elderly Women ◽  
Correlation Study ◽  
Trained Group ◽  
Mineral Density ◽  
T Score ◽  
Density Methods

ABSTRACT Introduction: Several studies have analyzed the relationship between physical activity and bone density. However, the prescription of exercise is not entirely clear as to the type, quantity and intensity. Objective: The objective of this study was to determine if there is a relationship between the amount of exercise and changes in bone mineral density. Methods: Fifty-two women, members of the Municipal Program of Physical Activity for Seniors, voluntarily underwent two ultrasonographies of the calcaneus within a 6-month interval. During this period, all physical activity was recorded. Afterwards, a lineal correlation study was carried out between the amount of exercise and bone changes, expressed as T-Score variation, first in total number of participants and then in groups. Considering the average body weight obtained for all women, two groups were created ("light" < 69 kg and "heavy" > 69 kg). Later, women who had participated in less than 72% of the targeted program were excluded from both groups, and the differences between the groups "light and trained" and "heavy and trained" were analyzed. To do so, the nonparametric Mann-Whitney U test was used. Results: A significant relationship of r= -0.59 was found between the total amount of exercise and the T-Score variation in the group of women above 69 kg. Significant differences were found between the "light and trained" group and the "heavy and trained" group with respect to the variation of T-Score. Conclusion: The effect of exercise on bone mineral density is determined, somehow, by body weight. This interaction is due, possibly, to mechanical demands difference.

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