Evidence map›Paper›PMID 18410232›Full record

ArticleJournal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research2008

Theoretical implications of the biomechanical fracture threshold.

Tony M Keaveny, Mary L Bouxsein

Abstract read
In one paragraph

Article in Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Hip protectors for preventing hip fractures in older people.The Cochrane database of systematic reviews · 2014
    Pooled it
  2. Further reductions in nonvertebral fracture rate with long-term denosumab treatment in the FREEDOM open-label extension and influence of hip bone mineral density after 3 years.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2015
    Trial
  3. Trial
  4. Femoral and vertebral strength improvements in postmenopausal women with osteoporosis treated with denosumab.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2014
    Trial
  5. Article
  6. Article
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  10. Associations between bone attenuation and prevalent vertebral fractures on chest CT scans differ with vertebral fracture locations.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2021
    Article
  11. Review
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  15. Differences in bone quality and strength between Asian and Caucasian young men.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2017
    Article
  16. Article
  17. Bone and Mineral Metabolism: Where Are We, Where Are We Going, and How Will We Get There?The Journal of clinical endocrinology and metabolism · 2016
    Article
  18. Trabecular bone score in kidney transplant recipients.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2016
    Article
  19. A biomechanical sorting of clinical risk factors affecting osteoporotic hip fracture.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2016
    Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Tony M KeavenyDepartment of Mechanical Engineering, University of California, Berkeley, California 94720-1740, USA. tmk@me.berkeley.edu
Mary L Bouxsein

Funding

Biomechanics of Vertebral Fracture: The Framingham QCT StudyR01AR053986 · NIAMS · BETH ISRAEL DEACONESS MEDICAL CENTER · PI BOUXSEIN, MARY L · 2007 to 2016
$5.4M
Biomechanics of Spine FractureR01AR049828 · NIAMS · UNIVERSITY OF CALIFORNIA BERKELEY · PI KEAVENY, TONY M · 2004 to 2007
$2.1M
NIAMS NIH HHS AR49828NIAMS NIH HHS AR53986NIAMS NIH HHS N01-AR-9-2245NIAMS NIH HHS R01 AR049828NIAMS NIH HHS R01 AR053986
6 · The paper itself

Abstract

Because of the dichotomous nature of a bone fracture, when Phi, the ratio of the applied impact force to the bone strength, is greater than a critical value--the biomechanical fracture threshold--fracture should occur. We sought to elucidate the conceptual implications of this biomechanical fracture threshold with application to hip fracture. We used data from the PaTH study, a 2-yr clinical trial in postmenopausal women treated with alendronate, PTH, or their combination. Outcomes included the force applied to the hip in a sideways fall as estimated from subject height and weight; femoral strength as determined by QCT-based finite element analysis; the load-to-strength ratio Phi; and total hip areal BMD from DXA. Results indicated that those with "very low" femoral strength (<2000 N) invariably had load-to-strength ratio Phi values well above the theoretical biomechanical fracture threshold (Phi = 1), but those with "moderately low" femoral strength (2000-4000 N) displayed Phi values both above and below the theoretical biomechanical fracture threshold. This finding implies that the risk of a hip fracture can be high in those with only moderately low BMD because femoral strength can be low relative to fall impact forces. The observed weak correlation between areal BMD and the load-to-strength ratio Phi (r2 = 0.14) suggests that consideration of the biomechanical fracture threshold may improve fracture risk assessment, particularly for those in the osteopenic range. Regarding treatment effects, only those subjects having load-to-strength ratio Phi values within a relatively narrow "transition zone" of +/- 20% of the assumed biomechanical fracture threshold at baseline were predicted to change fracture status during the trial. In theory, outcomes of fracture trials may be dominated by the responses of those within the "transition zone" at baseline, and treatment benefits in terms of fracture efficacy may depend the patient's baseline status with respect to the biomechanical fracture threshold. We conclude that consideration of the theoretical implications of the biomechanical fracture threshold may lead to new insights and advances in the assessment and treatment of osteoporosis.

Indexed as

Models, TheoreticalAbsorptiometry, PhotonAgedAged, 80 and overBiomechanical PhenomenaBone DensityFemaleHip FracturesHumansMiddle AgedOsteoporosis

Identifiers

PMID18410232
PMCPMC2684155

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.