Physis

Question 1

Reserve zone diseases

Answer 1

Gaucher’s, diastrophic dysplasia

Question 2

Proliferative zone diseases

Answer 2

Achondroplasia, Gigantism, MHE

Question 3

Maturation zone diseases

Answer 3

Hypertrophic zone: SCFE

Question 4

Degenerative zone diseases

Answer 4

Hypertrophic zone: SCFE

Question 5

Provisional calcification zone diseases

Answer 5

Hypertrophic zone: SCFE, Rickets, Salter-Harris I fractures

Question 6

Primary spongiosa (metaphysis)

Answer 6

Scurvy, metaphyseal corner fractures

Question 7

Groove of Ranvier

Answer 7

Increases the mechanical strength of the physis, responsible for appositional bone growths, supplies chondrocytes to periphery

Question 8

Perichondrial fibrous ring of La Croix

Answer 8

Anchors and supports the physis through peripheral stability, perichondral artery most important

Question 9

Type X collagen is located in the ____ zone of physis

Answer 9

Hypertrophic zone

Question 10

Last elbow apophysis to fuse

Answer 10

Medial epicondyle