Regenerative periodontal surgery uses bone grafts as part of the procedure

The reason that thrombolytic agents are not recommended for prolonged anticoagulation therapy is that they:

a. Are weak anticoagulants that often cause repeat thrombotic episodes b. Are powerful agents that increase the risk of hemorrhage c. Often need another agent for full anticoagulant effect d. Are used for prolonged anticoagulation therapy

When questioning the parent of a child who ingested a poisonous substance, which of the following questions would be of LEAST pertinence?

A. What time did the ingestion occur? B. Have you noticed any signs or symptoms? C. Why did your child ingest the poison? D. Do you know what substance was ingested?