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Related Concept Videos

Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
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.
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...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

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: Jun 25, 2026

Use of Human Perivascular Stem Cells for Bone Regeneration
07:05

Use of Human Perivascular Stem Cells for Bone Regeneration

Published on: May 25, 2012

Bone defects following curettage do not necessarily need augmentation.

Martti Hirn1, Uday de Silva, Sujith Sidharthan

  • 1The Oncology Unit, Royal Orthopaedic Hospital,, Birmingham, UK. martti.hirn@pshp.fi

Acta Orthopaedica
|February 24, 2009
PubMed
Summary
This summary is machine-generated.

Bone defects from benign tumors around the knee show variable natural healing after curettage alone. Larger defects (>60 cm³) increase complication risks, but 88% of patients avoid further intervention.

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Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis
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Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis
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Establishment of a Segmental Femoral Critical-size Defect Model in Mice Stabilized by Plate Osteosynthesis

Published on: October 12, 2016

Area of Science:

  • Orthopedic surgery
  • Bone oncology
  • Skeletal reconstruction

Background:

  • Bone healing patterns after curettage for benign bone tumors are not well-documented.
  • Understanding natural bone regeneration is crucial for treatment planning.

Purpose of the Study:

  • To analyze the natural bone healing process in large defects after curettage for benign bone tumors.
  • To establish a baseline for future studies involving bone defect reconstruction.

Main Methods:

  • Retrospective analysis of 146 patients with benign bone tumors treated with curettage only.
  • Radiographic assessment of defect size, bone infilling, and healing over 18 months.
  • Recording time to full weight bearing and complications.

Main Results:

  • Variable rates of bone infilling observed; some defects healed completely, others did not.
  • 88% of patients required no further surgical intervention post-curettage.
  • Mean time to full weight bearing was 6 weeks.
  • Defect size at diagnosis (>60 cm³) correlated with higher risks of fracture and osteoarthritis.

Conclusions:

  • Curettage alone can lead to natural bone healing in defects from benign bone tumors.
  • Defect size is a critical factor influencing long-term outcomes and complication rates.
  • This study provides a baseline for evaluating bone graft or substitute efficacy.