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Bone Disorders

Bone Disorders

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...

Bone Formation by Intramembranous Ossification

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...

Compact Bone

Compact Bone

Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...

Bone Formation by Endochondral Ossification

Bone Formation by Endochondral Ossification

Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...

Bone Structure

Bone Structure

Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.

Osteoclasts in Bone Remodeling

Osteoclasts in Bone Remodeling

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 bone...

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Related Experiment Video

Updated: Jul 10, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

Published on: November 20, 2015

Bone disease in preterm.

V V Khadilkar¹, A V Khadilkar, S S Joshi

¹Growth and Pediatric Endocrine Unit, Hirabai Cowasji Jehangir Medical Research Institute, Jehangir Hospital, 32, Sassoon Road, Pune, India. vkhadilk@vsnl.com

Indian Journal of Pediatrics

|November 6, 2007

Summary

This summary is machine-generated.

Survival rates for premature infants are rising, leading to new conditions like osteopenia of prematurity. This case study shows successful recovery from metabolic bone disease using phosphate, calcium, and vitamin D therapy.

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Published on: November 20, 2015

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Area of Science:

Neonatal Medicine
Pediatric Endocrinology
Nutritional Science

Background:

Improved survival rates in premature infants have led to an increase in related health complications.
Osteopenia of prematurity, a form of metabolic bone disease, is a growing concern in neonatal intensive care units.
Early identification and management of metabolic bone disease are crucial for long-term infant health.

Observation:

A premature infant diagnosed with metabolic bone disease of prematurity presented with significant bone health challenges.
The patient's condition required careful monitoring and therapeutic intervention over a six-month period.
Clinical progression was tracked from diagnosis through to full recovery.

Findings:

Therapy involving phosphate, calcium, and vitamin D supplementation demonstrated significant positive effects.
The patient exhibited remarkable improvement in bone metabolism markers and clinical status.
A comprehensive treatment approach led to the successful resolution of metabolic bone disease symptoms.

Implications:

This case highlights the efficacy of combined phosphate, calcium, and vitamin D therapy for metabolic bone disease in premature infants.
Effective management strategies can improve outcomes and reduce long-term morbidity associated with prematurity-related bone disorders.
Further research into optimal nutritional and therapeutic protocols for neonatal bone health is warranted.