Rational predictable posthole preparation

Restoration of the endodontically treated tooth is a common occurrence in everyday dental practice. Unfortunately, clinical posthole preparation seems to be a random technique. Even for a prefabricated post supplied with matching drills, the task is often difficult or not straightforward. Some questions inevitably arise. How long should the posthole be? How wide should the canal be prepared? How can the proper width be maintained so that the prefabricated post does not strip in the canal and lose its retention? If it is decided to use a cast post, what is the best posthole preparation to maximize retention? Is there an easy way to avoid perforating the root while preparing the canal for the post? Clinically, how can the posthole be prepared quickly, easily, and predictably every time? These key questions must be addressed when preparing the posthole.