Which procedure is least effective in reducing the occurrence of osteitis?

The procedure considered least effective in reducing the occurrence of osteitis is the use of oral antibiotics at the time of surgery. While oral antibiotics can be beneficial for treating existing infections or preventing infections in specific cases, their effectiveness in specifically preventing osteitis is limited. Osteitis, often referred to as dry socket, is more closely associated with local factors at the extraction site, such as blood clot formation and healing dynamics, rather than with systemic antibiotic coverage.

In contrast, other options have more direct effects on reducing osteitis. A chlorhexidine rinse helps maintain aseptic conditions in the mouth, reducing bacterial load and the risk of infection, which is integral in the healing process. Intrasocket antibiotics can be placed directly in the extraction site to target potential bacteria at the source, thereby reducing the risk of postoperative complications like osteitis. Minimal tissue trauma during the extraction can help preserve the supporting structures and promote optimal healing, further minimizing the chances of osteitis.

Therefore, oral antibiotics administered systemically do not address the specific local conditions that lead to osteitis as effectively as the other methods mentioned.