What suture material is appropriate for repairing a forehead laceration?

Forehead Laceration Suture Material

For forehead lacerations, use absorbable subcuticular sutures (such as 4-0 or 5-0 fast-absorbing gut or polyglactin) for simple, superficial wounds, or layered closure with deep absorbable sutures plus superficial absorbable sutures for deeper lacerations involving the frontalis muscle.

Primary Recommendation

The choice of suture material for forehead repair depends critically on wound depth and involvement of underlying muscle:

For Simple, Superficial Lacerations

• Absorbable sutures (fast-absorbing gut or synthetic absorbable) are equivalent to non-absorbable sutures for cosmetic outcomes 1, 2
• Fast-absorbing catgut and nylon produce comparable cosmetic results at 3 months (VAS scores 92.3 vs 93.7, difference <15mm minimal clinically important difference) 1
• Absorbable sutures eliminate the need for suture removal visits, reducing patient burden 3
• No significant difference in infection rates between absorbable (3.2%) and non-absorbable (4.9%) sutures 3

For Deep Lacerations Involving Frontalis Muscle

• Layered cosmetic suturing is essential to prevent dynamic expression dimpling 4
• Deep layer: Use absorbable sutures to approximate the frontalis muscle
• Superficial layer: Use fine absorbable sutures (4-0 or 5-0) in subcuticular fashion

Critical Pitfall: Tissue Adhesives

Avoid tissue adhesives as the sole closure method for forehead lacerations, particularly those involving muscle. Despite their convenience, tissue adhesives carry a 4-fold increased risk of dynamic expression dimpling (11.5% vs 3.0%, OR=3.92) compared to suturing 4. This occurs because adhesives cannot adequately approximate the underlying frontalis muscle, leading to contour deformities with facial expression.

Tissue adhesives may be considered only for:

• Very superficial lacerations (<2mm depth)
• Well-approximated wound edges without tension
• Small wounds in young children with needle phobia 5

However, even in these scenarios, sutures provide superior outcomes for preventing wound dehiscence (RR 3.35 for adhesive failure) 6.

Suture Technique Considerations

Use subcuticular continuous sutures rather than interrupted transcutaneous sutures when possible 6:

• Reduces superficial wound dehiscence (RR 0.08) 6
• No difference in infection rates between techniques 6
• Provides better wound edge approximation
• Avoids visible suture marks from transcutaneous placement

The evidence shows that 4-0 poliglecaprone and 4-0 polyglactin retain 50-75% tensile strength after 1 week, providing adequate support during critical healing phases 6.

Additional Considerations

• Triclosan-coated sutures reduce SSI risk (OR 0.72) if available, though this evidence comes primarily from abdominal surgery 6
• Avoid adhesive strips (steri-strips) as they provide no additional benefit to properly placed sutures 6
• Consider postoperative laser therapy as an independent factor for optimizing long-term scar appearance (β=-0.205) 4

Practical Algorithm

1. Assess wound depth:

   • Superficial (skin only) → Single-layer absorbable subcuticular suture
   • Deep (involves frontalis) → Layered closure with deep absorbable + superficial absorbable

2. Select suture size:

   • Deep layer: 4-0 or 5-0 absorbable (polyglactin, poliglecaprone)
   • Superficial: 5-0 or 6-0 fast-absorbing gut or synthetic absorbable

3. Technique:

   • Use subcuticular continuous technique when feasible
   • Ensure precise wound edge approximation
   • Avoid tension on wound edges

This approach maximizes cosmetic outcomes while eliminating the need for suture removal, which is particularly valuable in pediatric populations and reduces healthcare visits 1, 3.