The relationship between femoral neck strength, bone mineral content and fracture fixation strength: An in vitro study

1993 ◽  
Vol 3 (S1) ◽  
pp. 51-53 ◽  
Author(s):  
K. M. Shah ◽  
J. Goh ◽  
K. Bose
Keyword(s):  
Femoral Neck ◽  
Bone Mineral Content ◽  
Fracture Fixation ◽  
Mineral Content ◽  
In Vitro Study ◽  
Fixation Strength ◽  
Femoral Neck Strength ◽  
Neck Strength ◽  
The Relationship

scholarly journals Bone mineral content and fixation strength of femoral neck fractures: A cadaver study

1994 ◽  
Vol 65 (2) ◽  
pp. 161-165 ◽  
Author(s):  
Åke Sjöstedt ◽  
Carl Zetterberg ◽  
Tommy Hansson ◽  
Erik Hult ◽  
Lars Ekström
Keyword(s):  
Femoral Neck ◽  
Bone Mineral Content ◽  
Bone Mineral ◽  
Mineral Content ◽  
Cadaver Study ◽  
Femoral Neck Fractures ◽  
Fixation Strength

scholarly journals Effects of Positioning and Notching of Resurfaced Femurs on Femoral Neck Strength: A Biomechanical Test

2009 ◽  
Vol 17 (1) ◽  
pp. 47-50 ◽  
Author(s):  
A Nabavi ◽  
KM Yeoh ◽  
L Shidiac ◽  
R Appleyard ◽  
RM Gillies ◽  
...  
Keyword(s):  
Femoral Neck ◽  
Mechanical Strength ◽  
Total Energy ◽  
Third Generation ◽  
Biomechanical Test ◽  
Femoral Neck Strength ◽  
Load To Failure ◽  
Neck Fracture ◽  
Neck Strength

Purpose. To assess the effects of positioning and notching of resurfaced femurs on the mechanical strength of third-generation saw bone (TGSB) femurs using an in vitro analogue bone model. Methods. 30 TGSB femurs were equally divided into 6 resurfaced femur groups (intact, anatomic, varus, valgus, anatomically notched, and valgus notched) for testing the load to failure, stiffness, and total energy. Results. Compared to the intact femurs, the load to failure in all resurfaced femurs was significantly decreased by 29 to 57%. Among the resurfaced femurs, valgus and anatomic femurs had the highest load to failure, followed by valgus notched, varus, and anatomically notched femurs. Notching weakened the construct by a further 24 to 30%. Conclusion. To minimise the risk of femoral neck fracture, resurfaced femoral heads should be placed in an anatomic or valgus orientation, and the superior cortex of the femoral neck should remain intact.

scholarly journals The Positive Relationship between Moderate-to-Vigorous Physical Activity and Bone Mineral Content Is Not Mediated by Free Leptin Index in Prepubertal Children: The PANIC Study

2021 ◽  
Vol 18 (10) ◽  
pp. 5365
Author(s):  
Annie M. Constable ◽  
Josie E. Porter ◽  
Danielle Benger ◽  
Dimitris Vlachopoulos ◽  
Alan R. Barker ◽  
...  
Keyword(s):  
Physical Activity ◽  
Bone Mineral Content ◽  
Bone Mineral ◽  
Mineral Content ◽  
Vigorous Physical Activity ◽  
Normal Weight ◽  
Cross Sectional ◽  
Prepubertal Children ◽  
Total Body ◽  
The Relationship

Purpose: Moderate-to-vigorous physical activity (MVPA) positively influences bone mineral content (BMC) in prepubertal children, but it is unknown whether this relationship is partially mediated by free leptin index. The aim of this study was to examine whether the relationship between MVPA and total body less head (TBLH) BMC is mediated or moderated by free leptin index in prepubertal children. Methods: We performed a cross-sectional analysis on 401 children (194 girls) from baseline examinations of the Physical Activity and Nutrition in Childhood Study. We applied the four-way decomposition mediation analysis method to assess whether free leptin index, measured from fasted blood samples, mediated the relationship between accelerometer-measured MVPA and TBLH BMC measured by dual-energy X-ray absorptiometry. Results: MVPA had a positive controlled direct effect on TBLH BMC in girls and boys (β = 0.010 to 0.011, p < 0.05). There was no mediation or interaction between MVPA, free leptin index and TBLH BMC in girls or boys (β = −0.000 to 0.001, p > 0.05). Conclusion: Our study indicates that MVPA positively influences TBLH BMC through pathways not related to free leptin index in predominantly normal-weight prepubertal children, likely primarily through mechanical loading. The relationships between MVPA, free leptin index and TBLH BMC may be influenced by other factors such as pubertal status and adiposity, so it is unknown whether these observations extend to overweight and obese children at different stages of puberty.

scholarly journals Impact of Different Screw Designs on Durability of Fracture Fixation: In Vitro Study with Cyclic Loading of Scaphoid Bones

PLoS ONE ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. e0145949 ◽  
Author(s):  
Dominik Gruszka ◽  
Robert Herr ◽  
Hans Hely ◽  
Peer Hofmann ◽  
Daniela Klitscher ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Fracture Fixation ◽  
In Vitro Study ◽  
Vitro Study

scholarly journals New QCT Analysis Approach Shows the Importance of Fall Orientation on Femoral Neck Strength

2005 ◽  
Vol 20 (9) ◽  
pp. 1533-1542 ◽  
Author(s):  
R Dana Carpenter ◽  
Gary S Beaupré ◽  
Thomas F Lang ◽  
Eric S Orwoll ◽  
Dennis R Carter
Keyword(s):  
Femoral Neck ◽  
Analysis Approach ◽  
Femoral Neck Strength ◽  
Neck Strength

scholarly journals Divergent Significance of Bone Mineral Density Changes in Aging Depending on Sites and Sex Revealed through Separate Analyses of Bone Mineral Content and Area

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Yasumoto Matsui ◽  
Marie Takemura ◽  
Atsushi Harada ◽  
Fujiko Ando ◽  
Hiroshi Shimokata
Keyword(s):  
Bone Mineral Density ◽  
Lumbar Spine ◽  
Femoral Neck ◽  
Bone Mineral Content ◽  
Bone Mineral ◽  
Mineral Content ◽  
Neck Region ◽  
Community Dwelling ◽  
Mineral Density ◽  
Area Change

Bone mineral density (aBMD) is equivalent to bone mineral content (BMC) divided by area. We rechecked the significance of aBMD changes in aging by examining BMC and area separately. Subjects were 1167 community-dwelling Japanese men and women, aged 40–79 years. ABMDs of femoral neck and lumbar spine were assessed by DXA twice, at 6-year intervals. The change rates of BMC and area, as well as aBMD, were calculated and described separately by the age stratum and by sex. In the femoral neck region, aBMDs were significantly decreased in all age strata by an increase in area as well as BMC loss in the same pattern in both sexes. In the lumbar spine region, aBMDs decreased until the age of 60 in women, caused by the significant BMC decrease accompanying the small area change. Very differently in men, aBMDs increased after their 50s due to BMC increase, accompanied by an area increase. Separate analyses of BMC and area change revealed that the significance of aBMD changes in aging was very divergent among sites and between sexes. This may explain in part the dissociation of aBMD change and bone strength, suggesting that we should be more cautious when interpreting the meaning of aBMD change.

Abstract P615: Stress-Induced Changes in Total Bone Mineral Content and Total Bone Mineral Density due to Activation of the Renin-Angiotensin-Aldosterone System in Adolescent Females

Hypertension ◽  
2016 ◽  
Vol 68 (suppl_1) ◽  
Author(s):  
Vishwajeeth Pasham ◽  
Deborah Stewart ◽  
Laura Carbone ◽  
Gregory A Harshfield
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral Content ◽  
Bone Metabolism ◽  
Bone Mineral ◽  
Mineral Content ◽  
Mineral Density ◽  
Renin Angiotensin Aldosterone System ◽  
Total Bone Mineral Density ◽  
Total Bone Mineral Content ◽  
The Relationship

Background: Previous literature has shown a strong negative effect of angiotensin II (ANGII) on bone metabolism within mouse models. Additionally, psychological stress has been associated with activation of the renin-angiotensin-aldosterone system (RAAS). Stress has also been related to lower total bone mineral density (TBMD). However, there is controversy in the literature examining the relationship between the RAAS and bone metabolism within humans and stress has not been considered as a direct link between these systems. Purpose: We aimed to examine the relationship between stress-induced RAAS activation and TBMD and total bone mineral content (TBMC). Methods: Participants were placed on a sodium controlled diet for three days. Participants then underwent two hours rest, one hour mental stressor, and two hours recovery with hourly collections of blood/urine samples. Renin, ANGII, aldosterone, TBMD and TBMC were measured. Results: This study recruited 586 adolescents (mean age 16±1.116) with 51% women and 62% African-American and 38% Caucasian. Overall, relationships were observed between ANGII and aldosterone, and TBMC and TBMD controlling for age, race, and BMI. During stress, aldosterone was related to TBMD (r=-.150, p<0.05) and ANGII was related to TBMC (r=-.156, p<0.05) and TBMD (r=-.139, p<0.05). When comparing males and females, only females demonstrated a relationship between TBMC and ANGII in response to stress (stress: r=-.229, p<0.05; post-stress: r=-.277, p<0.01) and between aldosterone and TBMC (stress: r=-.199, p<0.05) and TBMD (stress: r=-.250, p<0.01). Renin was not significantly correlated with TBMD nor TBMC in any population. Conclusion/Interpretations: These data suggest that stress-induced RAAS activation may be associated with lower TBMD and TBMC in girls. Despite small correlations, consistency across multiple measures of RAAS activation being apparent in adolescents is significant. This observation may indicate that stress activation of RAAS contributes to bone remodeling in early life.

Composite indices of femoral neck strength in young adult male handball players

2021 ◽  
Author(s):  
Elie Maliha ◽  
Antonio Pinti ◽  
Paméla Bassim ◽  
Hechmi Toumi ◽  
Rawad El Hage
Keyword(s):  
Young Adult ◽  
Femoral Neck ◽  
Adult Male ◽  
Femoral Neck Strength ◽  
Young Adult Male ◽  
Composite Indices ◽  
Neck Strength
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