Injection of bulking agents is done with which material?

Injection of bulking agents is done with which material?

• A. Botulinum toxin
• B. Silicone
• C. Collagen
• D. Hyaluronic acid

Answer: (B)

Bulking injections aim to add volume in the periurethral tissue to improve urethral closure and prevent leakage. The material used should provide a lasting bulk. Silicone fits this role as a non-absorbable elastomer that remains in place, offering long-term bulking effect. Collagen and hyaluronic acid can be used as bulking agents too, but they are resorbable and typically require repeat injections to maintain effect. Botulinum toxin, by contrast, is not a bulking agent; it works by inhibiting muscle contractions to treat urge incontinence rather than increasing outlet resistance.

Bulking injections aim to add volume in the periurethral tissue to improve urethral closure and prevent leakage. The material used should provide a lasting bulk. Silicone fits this role as a non-absorbable elastomer that remains in place, offering long-term bulking effect. Collagen and hyaluronic acid can be used as bulking agents too, but they are resorbable and typically require repeat injections to maintain effect. Botulinum toxin, by contrast, is not a bulking agent; it works by inhibiting muscle contractions to treat urge incontinence rather than increasing outlet resistance.