Distraction Osteogenesis

Question 1

When DO is to be done in PEDI PT what is to be considered?

Answer 1

INCREASE in RATE… (Not rythm)

Question 2

Why is RATE of DO more in PEDO pt?

Answer 2

To prevent early consolidation.

Question 3

Why is DO Rate is LESS in OLDER pts?

Answer 3

To avoid fibrous unions

Question 4

LATENCY phase in for DO in 8 months old child?

Answer 4

0 to 2 days….

Question 5

Why is LATENCY period shortened in YOUNG or PEDO pts?

Answer 5

Due to increased BONE METABOLISM…

Question 6

In adult pts LATENCY Period is?

Answer 6

5 to 7 days

Question 7

In younger or PEDO pts ( younger than 5 yes ) LATENCY Period?

Answer 7

0 to 2 days

Question 8

What’s LATENCY Period in DO?

Answer 8

See… The DO procedure is like this…

1stly… Bone is CUT… Then the cut segments r pulled away from each other (this is what is DISTRACTION!!)… But before applying the DISTRACTION FORCES ( Pulling the Segments away ) the CUT/FRACTURED Bone is allowed some time to heal…
This time is LATENCY Period..! So easy!!

Question 9

Principle of DO?

Answer 9

Tension over Traction

Question 10

Law of tension -stress given by?

Answer 10

Ilizarov

Question 11

DO… True is?

Answer 11

Applied when bone GROWTH is not yet complete…