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Related Experiment Videos

Undermining of the scalp: quantitative effects

E Raposio1, R E Nordström, P L Santi

  • 1Department of Plastic, Reconstructive, and Hand Surgery at University Hospital, Tromsø, Norway.

Plastic and Reconstructive Surgery
|April 7, 1998
PubMed
Summary

Subgaleal undermining significantly reduces scalp defect closure tension. Increased undermining, particularly 5 cm and 15 cm, progressively decreases tension, enhancing surgical outcomes.

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Area of Science:

  • Plastic Surgery
  • Surgical Techniques
  • Biomechanics

Background:

  • Scalp defects pose challenges for closure due to limited laxity.
  • Undermining is a common surgical technique to reduce tissue tension.
  • Quantifying the benefit of subgaleal undermining for scalp closure is essential.

Purpose of the Study:

  • To evaluate the impact of subgaleal undermining on scalp defect closing tension.
  • To quantify the surgical benefits of varying degrees of undermining.
  • To determine the optimal extent of undermining for scalp closure.

Main Methods:

  • Stepwise loading was performed on 20 scalp flaps from 10 patients.
  • Three degrees of subgaleal undermining (1 cm, 5 cm, 15 cm) were tested.
  • Closing tension was measured at each undermining increment.

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Main Results:

  • A progressive decrease in closing tension was observed with increased undermining.
  • 5 cm of undermining reduced closing tension by a mean of 83.3%.
  • 15 cm of undermining reduced closing tension by a mean of 92.2% compared to 1 cm.

Conclusions:

  • Subgaleal undermining is effective in reducing scalp defect closing tension.
  • Significant tension reduction is achieved with 5 cm and 15 cm of undermining.
  • This technique offers quantifiable benefits for scalp defect closure.