Why is rubber dam isolation essential during endodontic procedures, and what are two major risks of not using it?

• A. It creates a sterile working field and protects the patient from aspirating or swallowing materials; risks include canal contamination leading to treatment failure and accidental ingestion or aspiration of irrigants or instruments.
• B. It reduces chair time and improves aesthetics.
• C. It is optional and has no effect on infection control.
• D. It is only necessary for impression taking.

Answer: (A)