Calcium phosphate antibiotic beads peak release occurs at approximately how many hours?

Calcium phosphate antibiotic beads peak release occurs at approximately how many hours?

• A. 1 hour
• B. 3 hours
• C. 6 hours
• D. 12 hours

Answer: (B)

Antibiotic release from calcium phosphate beads happens with an initial burst that is strongest in the early hours after implantation. The peak release tends to occur at about three hours, after which the rate drops as the matrix releases most of its payload and begins to resorb. This early high concentration helps achieve therapeutic levels locally right when the infection risk is highest. A one-hour peak would imply an unrealistically fast diffusion for this material, while a six- or twelve-hour peak would shift the peak later than what is typically observed for this carrier.

Antibiotic release from calcium phosphate beads happens with an initial burst that is strongest in the early hours after implantation. The peak release tends to occur at about three hours, after which the rate drops as the matrix releases most of its payload and begins to resorb. This early high concentration helps achieve therapeutic levels locally right when the infection risk is highest. A one-hour peak would imply an unrealistically fast diffusion for this material, while a six- or twelve-hour peak would shift the peak later than what is typically observed for this carrier.