Radiological Study on Sesamoid Bones of the Foot among Omani Subjects

Shabibi, Ammar Al; Sirasanagandla, Srinivasa Rao; Thuhli, Zahran Al; Dhuhli, Humoud Al; Mushaiqri, Mohamed Al; Jaju, Sanjay

doi:10.5001/omj.2020.105

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…Most of these variations are recognized incidentally during radiological imaging in clinical practice (Figure 2). Evidence from reported studies shows that the prevalence and appearance of sesamoid bones in the foot vary considerably between different populations and ethnic groups [6,7,8]. Although the first metatarsophalangeal joint (MTF) is anatomically small, it plays an important role in supporting great propulsion during normal walking [9].…”

Section: Introductionmentioning

confidence: 99%

Metatarsal Sesamoids: Borges-Napoleon Sign

Morais,

Felix,

Azevedo

2024

BJCR

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The metatarsal sesamoids have been well studied due to their consistent presence in humans and relatively common involvement in foot pathologies. The manifestations of sesamoid lesions on imaging depend on the nature of the pathology and generally overlap. During observation in sectional examinations, an anatomical pattern sign of the sesamoid bones of the first metatarsal was identified to be assessed by specialists in diagnostic imaging to note alterations that deviate from this anatomical pattern sign. Would the anatomical pattern sign in question help in the diagnosis of pathological alterations once it has been de-characterized? The presentation of the Borges-Napoleon sign characterizes the normality of the bones involved in the image, making it safe to diagnose pathological alterations that compromise their structure. Therefore, presenting this idealization could help improve medical reports. The sign is described as the "Borges-Napoleon Sign" because of its resemblance to the silhouette of the Frenchman Napoleon Bonaparte and in reference to the creator of the imaging description, Yuri Borges Morais. Pathological alterations such as traumatic injuries, sesamoiditis, dislocations, fractures, and hallux valgus ("bunions"), among others, de-characterize the Borges-Napoleon sign; the absence of the sign is indicative of an abnormality in the metatarsal-sesamoid-phalangeal region.

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Section: Introductionmentioning

confidence: 99%

Metatarsal Sesamoids: Borges-Napoleon Sign

Morais,

Felix,

Azevedo

2024

BJCR

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Mechanobiology of human pisiform formation as a model for endochondral ossification

Bhramdat

Daegling

2023

The Anatomical Record

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The role of mechanical stimuli in promoting endochondral ossification during somatic growth and maturation remains an active area of research. This study employs a pisiform model of endochondral ossification to investigate the potential role of mechanobiological signals in the appearance and development of ossification centers and to develop theoretical applications to the primate basicranium. We constructed finite element models based on the structure of a human pisiform within the flexor carpi ulnaris tendon. The pisiform was assigned initial material properties of hyaline cartilage, and tendon properties were based on in situ observations drawn from the literature. A macaque growth model was used to simulate increased load over time as a function of body mass. A load case of uniaxial tension from the tendon was applied over 208 iterations, to simulate weekly growth over a 4‐year span. The mechanical signal was defined as shear stress. Element stresses were evaluated in each iteration, with elements exceeding the yield threshold subsequently assigned a higher elastic modulus to mimic mechanically driven mineralization. Three unique mineralization rates were tested. Regardless of rate, all ossification simulations predict a pisiform with heterogeneous stiffness through alternating periods of material stasis and active mineralization/ossification. Assuming metabolic processes underlying endochondral ossification are similar throughout the body, our model suggests that a mechanical signal alone is an insufficient stimulus in the etiology of bone formation through endochondral ossification. Consequently, given the general validity of the simulation, endochondral ossification cannot be fully explained in terms of mechanical stimuli.

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Radiological Study on Sesamoid Bones of the Foot among Omani Subjects

Cited by 2 publications

References 21 publications

Metatarsal Sesamoids: Borges-Napoleon Sign

Metatarsal Sesamoids: Borges-Napoleon Sign

Mechanobiology of human pisiform formation as a model for endochondral ossification

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