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Related Concept Videos

Bone Cells and Tissue01:30

Bone Cells and Tissue

Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
Osteoblasts and Osteocytes
The osteoblast is the bone cell responsible for forming new bone tissue. It is found in the growing portions of bone, including the periosteum and...
Compact Bone01:27

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...
Osteoclasts in Bone Remodeling01:31

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...
Spongy Bone01:09

Spongy Bone

All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Bone Remodeling01:40

Bone Remodeling

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.
Gross Anatomy of Bone01:17

Gross Anatomy of Bone

The two main features of a long bone are the diaphysis and the epiphysis.
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in adults, it...

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Updated: Jun 16, 2026

Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma
08:07

Three-Dimensional Bone Extracellular Matrix Model for Osteosarcoma

Published on: April 12, 2019

Osteoid osteoma.

B S Manjunatha1, D Nagarajappa

  • 1Department of Oral and Maxillofacial Pathology, K M Shah Dental College & Hospital, Pipariya-391 760, Waghodia, Vadodara, Gujarat, India.

Indian Journal of Dental Research : Official Publication of Indian Society for Dental Research
|February 9, 2010
PubMed
Summary

Osteoid osteoma, a rare benign bone tumor originating from osteoblasts, is exceptionally uncommon in the jaws. This case report highlights its extreme rarity, with only 15 previously documented instances in English literature.

Area of Science:

  • Orthopedic Oncology
  • Oral and Maxillofacial Surgery
  • Bone Pathology

Background:

  • Osteoid osteoma is a benign bone-forming tumor.
  • It typically affects long bones, rarely occurring in the craniofacial skeleton.
  • Understanding its presentation in the jaws is crucial due to its infrequency.

Observation:

  • A rare case of osteoid osteoma in the jaw is presented.
  • This benign tumor arises from osteoblasts.
  • The rarity is emphasized by the limited number of reported cases.

Findings:

  • Osteoid osteoma is characterized by a nidus of osteoid tissue surrounded by reactive bone.
  • Diagnosis often requires advanced imaging techniques.
  • Surgical excision or minimally invasive procedures are common treatment modalities.

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Analysis and Imaging of Osteocytes
10:19

Analysis and Imaging of Osteocytes

Published on: November 29, 2024

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Tension-Free Weight-Bearing Model of Steroid-Induced Osteonecrosis of Femoral Head in Rats
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Analysis and Imaging of Osteocytes
10:19

Analysis and Imaging of Osteocytes

Published on: November 29, 2024

Implications:

  • This case contributes to the limited literature on jaw osteoid osteomas.
  • Highlights the importance of considering rare diagnoses in persistent jaw pain or swelling.
  • Further research may elucidate specific risk factors or diagnostic markers for craniofacial osteoid osteomas.