Indications for osseous resective surgery include all except which of the following?

Osseous resective surgery is typically indicated for specific types of periodontal defects where removal of bone can lead to improved periodontal health and attachment. The correct choice in this scenario is the 3-walled intrabony defect.

In general, osseous resective procedures are most advantageous for defects where the configuration allows for effective access and visibility to the root surfaces while minimizing the risk of further attachment loss. A shallow 2-walled bony defect can be treated with resective surgery because it typically allows for adequate access to clean the root surface and restoration of osseous architecture through recontouring. A 1-walled hemiseptum defect also often benefits from resective surgery as it enables a more favorable healing environment by modifying the architecture.

Conversely, a 3-walled intrabony defect tends to provide better prognosis for regenerative procedures, leading to greater potential for successful bone and tissue regeneration due to the presence of three remaining walls that support the defect. This configuration presents a particularly advantageous scenario for regeneration rather than resection, making it the correct answer in the context of indications for osseous resective surgery, as it is typically reserved for defects that are less favorable for regeneration.

Furthermore,