Types of Bone Fractures and Their Repair

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Questions and Answers

What role do fibroblasts play in the process of fracture repair?

They transform into osteocytes to strengthen the bone.

They dissolve dead bone tissue to facilitate healing.

They fill the fracture gap with blood.

They secrete collagen fibers to form a connective tissue bridge. (correct)

Which characteristic correctly describes spongy bone compared to compact bone?

Spongy bone has a more complex structure with trabeculae. (correct)

Spongy bone is denser than compact bone.

Spongy bone contains more blood vessels.

Spongy bone is primarily found in the outer layers of the bone.

What is primarily found within the Haversian canals?

Osteons for structural support.

Adipose tissue for energy storage.

Nerves and blood vessels. (correct)

Collagen fibers and cartilage.

What component distinguishes the bone matrix composition from other connective tissues?

Presence of collagen and mineral salts. Signup and view all the answers

What initial formation occurs during the early stages of bone fracture repair?

Development of a hematoma. Signup and view all the answers

What role do fibroblasts play in the healing of a bone fracture?

They infiltrate the hematoma and help form a soft callus. Signup and view all the answers

Which statement accurately describes the relation between the hematoma and the healing process of bones?

The hematoma acts as a temporary scaffold for new blood vessels and cells. Signup and view all the answers

What is the primary composition of the soft callus that forms after a fracture?

Fibrocartilage formed by collagen fibers and chondroblasts. Signup and view all the answers

In the context of bone restoration, what function do chondroblasts fulfill?

They help produce cartilage that contributes to the soft callus. Signup and view all the answers

What type of fracture is characterized by being shattered into multiple fragments?

Comminuted Signup and view all the answers

What is the role of blood vessels in the area of a hematoma in a fractured bone?

They deliver nutrients and remove waste from the healing tissues. Signup and view all the answers

Which fracture results from a twisting force applied to the bone?

Spiral Signup and view all the answers

Which type of fracture is typically associated with the elderly due to reduced bone mass?

Compression Signup and view all the answers

An avulsion fracture commonly occurs in which scenario?

Due to a tendon or ligament pulling off bone Signup and view all the answers

Which type of fracture appears similar to a break in a green twig, involving bending on one side?

Greenstick Signup and view all the answers

What type of fracture may interfere with growth and occurs specifically in children and young adults?

Epiphyseal Signup and view all the answers

How does a greenstick fracture differ from a complete fracture?

It bends on one side instead of breaking completely Signup and view all the answers

What distinguishes a comminuted fracture from other types?

The bone is shattered into multiple pieces Signup and view all the answers

Study Notes

Types of Fractures

Spiral fracture: Caused by twisting forces applied to the bone.
Compression fracture: Bone crushed under weight bearing, common in elderly and those with reduced bone density.
Comminuted fracture: Shattered bone into multiple fragments, difficult to repair.
Avulsion fracture: A tendon or ligament pulls off a fragment of bone, commonly observed in ankle fractures.
Greenstick fracture: Bone breaks on one side but only bends on the other, similar to a "green" twig. Common in children due to their more flexible bones.
Epiphyseal plate fracture: Involves at least part of the epiphyseal plate (growth plate), occurs only in children and young adults. May interfere with growth.

Fracture Repair Process

Stage 1: A hematoma (blood clot) fills the gap between the broken bone fragments.
Stage 2: Fibroblasts and chondroblasts (cells involved in tissue repair) infiltrate the hematoma, forming a soft callus.
Stage 3: Fibroblasts secrete collagen fibers, forming a connective tissue bridge that closes the gap between the bone fragments.

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Description

This quiz covers the various types of bone fractures, including spiral, compression, and greenstick fractures, as well as the fracture repair process. Understand how different fractures occur and the stages involved in healing them. Perfect for students of anatomy and physiology or those interested in orthopedic medicine.