Ogden Classification and Watson-Jones Classification

Ogden classification (modification of Watson-Jones classification) is a special type of investigating the fracture pattern, severity, degree, and fracture angle of tibial tubercle fracture, tibial tubercle avulsion fractures, tibial plateau stress fracture, tibial tuberosity avulsion injuries classification. It is the most universal and acceptable classification until now. Types 1: avulsion of the apophysis without injury to the tibial epiphysis. type 2: epiphysis is lifted cephalad and incompletely fractured. type 3: displacement of the proximal base of the epiphysis with the fracture line extending into the joint.

There are multiple classification systems with multiple modifiers. The most commonly used is the modified Ogden classification.

Modified Ogden classification (modification of Watson-Jones classification):

  • type I: fracture of the secondary ossification center near the patella tendon insertion
  • type II: fracture between the primary and secondary ossification centers
  • type III: a fracture that traverses the primary and secondary ossification centers (most common type)
  • type IV: fracture through the entire physis
  • type V: avulsion of the periosteal sleeve
  • modifiers: A – nondisplaced and B – displaced

Watson-Jones classification:

  • type 1: avulsion of the apophysis without injury to the tibial epiphysis
  • type 2: epiphysis is lifted cephalad and incompletely fractured
  • type 3: displacement of the proximal base of the epiphysis with the fracture line extending into the joint

Classification

According to orthobulet.com

Based on the level of fracture and presence of fragment displacement
Type III is most common
Ogden Classification (modification of Watson-Jones)
Type I
Fracture of the secondary ossification center near the insertion of the patellar tendon
Type II
Fracture propagates proximally between primary and secondary ossification centers
Type III
Coronal fracture extending posteriorly to cross the primary ossification center
Type IV
Fracture through the entire proximal tibial physis
Type V
Periosteal sleeve avulsion of the extensor mechanism from the secondary ossification center
Modifier: A (nondisplaced), B (displaced)

or

According to Science direct.com

Ogden classification of a tibial tubercle avulsion fracture.

type description
IA Fracture distal to the junction of ossification center of proximal tibial epiphysis and tubercle
IB Same as type IA but with comminution of the fracture fragment
IIA Fracture extension to the junction of proximal tibial physis
IIB Same as type IIA but with comminution of the fracture fragment
IIIA The fracture extends into the joint through proximal
tibial epiphysis with displacement of the fracture
fragment
IIIB Same as type IIIA with comminution of the fracture
fragment Fracture extension transversely through proximal
IV Tibial physis with the displacement of the fracture
fragment

References

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