Langer's lines: to use or not to use

Area of Science:

• Surgical anatomy
• Dermatology
• Plastic surgery

Background:

• Thirty-six guidelines exist for elective incisions, with many surgeons favoring Langer's lines.
• Langer's lines were derived from anatomical studies on cadavers in rigor mortis.
• Alternative methods include Kraissl's lines (perpendicular to muscle action) and Borges's relaxed skin tension lines (based on skin pinching).

Discussion:

• Langer's lines, derived from cadavers, may not accurately reflect dynamic skin tension in living patients.
• Kraissl's and Borges's lines consider muscle action and skin relaxation, respectively, offering potentially better guidance.
• Scar camouflage is multifactorial, influenced by wrinkles and contour lines, not solely incision guidelines.

Key Insights:

• Borges's relaxed skin tension lines and Kraissl's lines may be superior guides for facial and body incisions, respectively.
• The effectiveness of Langer's lines is questioned due to their origin and lack of consideration for dynamic skin tension.
• Optimal scar management involves considering multiple factors beyond traditional incision lines.

Outlook:

• Further research could validate the efficacy of Borges's and Kraissl's lines in diverse patient populations.
• Investigating the integration of wrinkle and contour lines into surgical planning could enhance scar outcomes.
• Developing dynamic tension mapping techniques may offer more precise guidance for elective incisions.