Growth plate and fracture talk

what are the components that make up the growth plate

• Fibrous component

• cartilaginous component

• Bony component

• Vascular supply

What is the purpose of the fibrous component of the growth plate?

Protects the cartilage

THe fibrous component surrounds the ________ and protects against what type of force

• growth plate

• shear forces

Label the provided parts of the fibrous component of the growth plate

4. Growth plate

7. fibrous periosteum

8. Ring of lacroix

9. Groove of Ranvier

The groove of ranvier is a _______ and aids in the growth of the ______ and _____ of the bone

• source of chondrocytes

• diameter

• length

Part of the fibrous component lies between the groove of Ranvier and methaphysis, and aids the bone by providing mechanical support it is known as the _______

Ring of lacroix

List the zones present in the cartilaginous component of he growth plate

1. resting zone

2. proliferative zone

3. hypertrophic zone

4. mineralization zone

The resting zone of the cartilaginous component of the growth place is the main section that contains _____ cells

germinal cells

Does the growth plate have intrinsic blood supply

no

In the growth plate their exists no blood vessels beyond the _______

proliferative zone

What are the 2 types of growth plates

• pressure growth plate

• Traction growth plate

What growth plate exists at the end of long bones and aids in the growth of bone length

Pressure growth plates

This growth plates exists at the origin and insertion of muscles and does not contribute to length what is it called?

Traction growth plate

Most growth plates will close within ____ for dogs

1 year

In dogs which Humerus growth plate contributes the most to length

Proximal growth plate

In the dog which radial growth plate contributes the most to growth?

Distal growth plate

In the dog which ulnar growth plate contributes the most to growth?

Distal growth plate

In the dog which femur growth plate a contributes the most to growth

Distal growth plate

Unlike dogs the first growth plate closure in cats occurs at _____

4 months

In cats most growth plates close within ______

9 months

What are the 3 main growth plates in large animals

• Distal radial physis

• Distal tibial physis

• Distal metacarpus/metatarsus

In large animal both the radial and tibial physics are open up to ______ and a majority of their growth occurs by month ____

• 24 months

• 6 months

In large animals the distal metacarpus growth plate closes after _____

3 months

Growth plate injuries are common due to the inherent weakness of at the ________

hypertrophic zone

Growth plate injuries typically happen in _____ animals and can come from 2 causes

• young

• low trauma

• High trauma

A young puppy is presented for a swollen painful limb what is the next course of action you should take?

radiographs

A dog presents for a fracture through the physics only how would you classify this?

Salter harris type 1

A dog presents for a fracture through the Physis and metaphysis how would you classify it

Salter harris type 2

A dog presents for a fracture through the physis and the epiphysis which affects the articular surface how would you classify this.

Salter harris type 3

A dog presents for a fracture through the epiphysis, metaphysis, and physis how would you classify this?

Salter harris type 4

A dog presents for a crushing injury at the physis how would you classify this?

Salter harris type 5

A salter harris 1 fracture typically is a separation through the growth plate at the ______

hypertrophic zone

Salter harris fractures will predominantly happen at what location?

Capital physis(proximal femoral physis)

salter harris type 3 fractures are often _______ fractures

Condylar

Salter harris type 4 fractures typically occur where in the dog?

Distal humerus

what area in the dog most commonly gets type 5 salter harris growth plate fractures

Distal Ulna

Type 5 salter harris fractures can cause premature closure of the ______ physis leading to the ________ effect

• distal ulna

• bowstring

A salter harris type 6 injury typically involves damage to the ________ and can cause ___________

• Groove of ranvier

• uneven growth

what complications can occur due to a growth plate injury

• none

• growth arrest

• valgus deformity

• varus deformity

• osteoarthritis

When describing a fracture what is needed to be known

• bone

• location

• configuration

• displacement

• contamination

• acute or chronic

• soft tissues

a fracture though only one cortex is known as _________

incomplete

a fracture through both corticies is known as ______

complete

When describing displacement it must be of the _____ segment relative to the ______

• distal

• proximal

contamination of the fracture is determined based on weather it is _____ or ______

• open

• closed

Acute fractures will have ______ edges while chronic will have ______ edges and possible _____ formation on radiographs

• sharp

• blunt

• callus