system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following is the single most important predictor of clinical success of a cast post and core?
assistant
The correct answer is  The length, canal enlargement, and a finish line for the post are unimportant, if there is no sound remaining coronal tooth structure to get a ferrule of the final restoration.