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Z Plasty
Dr Joe Antony
• The Z-plasty is a procedure which involves the
transposition of two inter-digitating triangular
flaps
• First performed by Horner in 1837 and
Denonvilliers in 1854.
– They used to correct cicatricial ectropion
• The first published mathematical analysis
came from Limberg in 1929.
• Limberg used pythogorian theory to derive
length achieved by each angles
Principles
• 1. There is a gain in length along the direction
of the common limb of the Z.
• 2. The direction of the common limb of the Z
is changed.
Theoretical basis
• the length of the contractural diagonal after
transposition equals that of the transverse
diagonal before transposition.
– unless there is transverse skin slack available,
equal in quantity to the length difference between
the axes of the Z, the method will not work.
Variables in construction
• Limb length
• Angle
Multiple Z plasty
• Can be constructed as
– Parallel or Skewed
– Continuous or interrupted
Limberg’s four-flap and Mustarde’s “jumping
man” five-flap Z-plasties
Blood supply of flaps
• Provision of maximum vascularity
– designing the flaps broad at the tip
– by cutting the flaps as thick as possible
– avoiding scarring across the base
• Avoidance of undue tension
– Tip necrosis in single large Z plasty.
Classified as
• Simple
• Planimetric
• Skew
• Multiple
Simple Z plasty
• stereometric Z-plasty
• two flaps of equal angle and length
• Raised at 60° as this angle offers the best
balance between elongation in the axis of the
scar and the creation of tension forces pulling
perpendicular to the scar.
Planimetric Z plasty
• By minimizing the amount of rotation and
excising redundant tissue, this flap design
avoids the contours and depressions
• May theoretically be designed with lateral
limb angles ranging from 60° to 90°, though
most often they are planned at 75° angles
• Planimetric Z-plasty is ideal for scar releases
on flat surfaces where lengthening is the
primary objective and contour deformities
would be suboptimal.
Skew Z plasties
• Skew Z-plasties have lateral limbs departing at
different angles from one another.
• This flap has been suggested when anatomic
landmarks mandate asymmetric movement of
one flap.
• Narrow flap form dog ear while suturing
• Wide flap has more tension over the base ,
causing restricted blood supply to the flap tip
Contracture release
• Adequate amount of free skin must be
available transversly
• Burns contracture- Usually with surrounding
skin scarring
Planning of Z plasty
• Draw equilateral triangle on both sides
• 1. The flap with the better blood supply is
preferable. In particular a potential flap with
scarring across the base should be avoided.
• 2. One flap may result in a scar which will fall
into a better line cosmetically.
• 3. The lie of the flaps and the surrounding
skin may permit one set of flaps to transpose
more readily into their new position.
Thank you

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Z plasty in scar contracture release

  • 2. • The Z-plasty is a procedure which involves the transposition of two inter-digitating triangular flaps • First performed by Horner in 1837 and Denonvilliers in 1854. – They used to correct cicatricial ectropion • The first published mathematical analysis came from Limberg in 1929.
  • 3. • Limberg used pythogorian theory to derive length achieved by each angles
  • 4. Principles • 1. There is a gain in length along the direction of the common limb of the Z. • 2. The direction of the common limb of the Z is changed.
  • 6. • the length of the contractural diagonal after transposition equals that of the transverse diagonal before transposition. – unless there is transverse skin slack available, equal in quantity to the length difference between the axes of the Z, the method will not work.
  • 7. Variables in construction • Limb length • Angle
  • 9. • Can be constructed as – Parallel or Skewed – Continuous or interrupted
  • 10. Limberg’s four-flap and Mustarde’s “jumping man” five-flap Z-plasties
  • 11. Blood supply of flaps • Provision of maximum vascularity – designing the flaps broad at the tip – by cutting the flaps as thick as possible – avoiding scarring across the base • Avoidance of undue tension – Tip necrosis in single large Z plasty.
  • 12. Classified as • Simple • Planimetric • Skew • Multiple
  • 13. Simple Z plasty • stereometric Z-plasty • two flaps of equal angle and length • Raised at 60° as this angle offers the best balance between elongation in the axis of the scar and the creation of tension forces pulling perpendicular to the scar.
  • 14. Planimetric Z plasty • By minimizing the amount of rotation and excising redundant tissue, this flap design avoids the contours and depressions
  • 15. • May theoretically be designed with lateral limb angles ranging from 60° to 90°, though most often they are planned at 75° angles • Planimetric Z-plasty is ideal for scar releases on flat surfaces where lengthening is the primary objective and contour deformities would be suboptimal.
  • 16. Skew Z plasties • Skew Z-plasties have lateral limbs departing at different angles from one another. • This flap has been suggested when anatomic landmarks mandate asymmetric movement of one flap.
  • 17. • Narrow flap form dog ear while suturing • Wide flap has more tension over the base , causing restricted blood supply to the flap tip
  • 18. Contracture release • Adequate amount of free skin must be available transversly • Burns contracture- Usually with surrounding skin scarring
  • 19.
  • 20.
  • 21. Planning of Z plasty • Draw equilateral triangle on both sides • 1. The flap with the better blood supply is preferable. In particular a potential flap with scarring across the base should be avoided. • 2. One flap may result in a scar which will fall into a better line cosmetically. • 3. The lie of the flaps and the surrounding skin may permit one set of flaps to transpose more readily into their new position.
  • 22.