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Videos de Conceptos Relacionados

Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

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Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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The Parathyroid Glands00:59

The Parathyroid Glands

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The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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North American Society for Interventional Thyroidology Statement on Directed Ablative Therapy for the Management of Benign Non-functional Thyroid Nodules.

Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists·2026
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Disparities in utilization of high-volume thyroid surgeons for Graves disease: a statewide analysis.

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Updated: Jan 8, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
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Cambios en la Densidad Mineral Ósea Post-Paratiroidectomía en Pacientes con Hiperparatiroidismo Primario

Firdhous Abdul Kather1, Nazanene H Esfandiari2, Gregory A Clines2

  • 1MDWell.com, Livonia, Michigan.

Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists
|December 20, 2025
PubMed
Resumen

La paratiroidectomía mejoró la densidad mineral ósea (DMO) en el cuello femoral y la cadera total en pacientes con hiperparatiroidismo primario leve, especialmente aquellos con osteoporosis. El manejo personalizado es clave para la salud ósea.

Palabras clave:
densidad óseaparatiroidectomíahiperparatiroidismo primario

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Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation
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Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation
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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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Área de la Ciencia:

  • Endocrinología
  • Metabolismo óseo
  • Resultados quirúrgicos

Sus antecedentes:

  • El hiperparatiroidismo primario (HPT) se asocia con una disminución de la densidad mineral ósea (DMO).
  • La intervención quirúrgica, la paratiroidectomía, es un tratamiento primario para el HPT.
  • El impacto de la paratiroidectomía en la DMO en el HPT leve requiere una mayor elucidación.

Objetivo del estudio:

  • Evaluar los cambios en la DMO después de la paratiroidectomía en pacientes con HPT leve bioquímicamente.
  • Identificar los sitios esqueléticos y los subgrupos de pacientes que se benefician de la mejora de la DMO después de la cirugía.

Principales métodos:

  • Revisión retrospectiva de 93 pacientes con HPT sometidos a paratiroidectomía (2000-2022).
  • Densitometrías por absorciometría de rayos X de energía dual (DXA) pre y post-paratiroidectomía.
  • Análisis estadístico utilizando ANOVA; la significancia se definiió como P < 0.05.

Principales resultados:

  • No hubo diferencias significativas en la DMO basadas en la edad, el momento de la DXA, las características de las glándulas o los niveles preoperatorios de vitamina D/calcio.
  • Mejora significativa de la DMO postoperatoria en el cuello femoral en pacientes osteoporóticos en comparación con los grupos con densidad ósea osteoporótica/normal.
  • El estado general de osteoporosis mostró ganancias significativas de DMO en el cuello femoral y la cadera total en comparación con la osteopenia.

Conclusiones:

  • La paratiroidectomía puede conducir a mejoras significativas de la DMO en sitios esqueléticos específicos en el HPT leve.
  • La DMO del cuello femoral y de la cadera total muestra ganancias notables, particularmente en pacientes con osteoporosis.
  • Las intervenciones personalizadas y los enfoques individualizados son cruciales para optimizar los resultados de salud ósea en el manejo del HPT.