Endodontics · single question
The BEST predictor of long-term success for an endodontically treated tooth is:
Show answer and explanation
Correct answer: B. Placement of a full-coverage restoration
While quality obturation, absence of periapical pathology, and proper length are all important, the BEST predictor of long-term success of an endodontically treated tooth is placement of a full-coverage restoration (crown). Teeth without full coverage have significantly higher rates of fracture and tooth loss — the tooth structure remaining after RCT makes the tooth brittle and fracture-prone without crown protection.
- A. Quality of obturation is important but not the best predictor of long-term tooth survival — coronal seal and restoration are equally or more critical.
- B. CORRECT. Full-coverage restoration (crown) is the best predictor of long-term success. It protects weakened tooth structure from fracture and maintains the coronal seal — both critical for long-term tooth survival.
- C. Canal fill length within 2 mm of apex is a technical obturation goal but is not the best overall predictor of tooth survival.
- D. Absence of periapical lesion at 6 months indicates endodontic healing, but without proper coronal restoration the tooth remains at high risk for fracture.