29 Victoria Street, Ballarat
East VIC 3350 Australia
Phone : (03) 5332 3043
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The successful treatment of teeth with substantial damage to the tooth structure not only depends on good endodontic treatment, but also by prompt prosthodontic reconstruction of the tooth after the completion of the same. The primary purpose of the post is to retain a core that can be used to retain a definitive prosthesis. A post and core helps to prevent fracture when the remaining tooth structure is very less. When a large amount of tooth structure is lost, a custom cast post and core is indicated.The following case reports depict the interdisciplinary approach to restore function and aesthetic of severely damaged treated teeth by means of full veneer crowns after custom cast post. Coordinated by prosthetic, endodontic treatments with careful consideration of patient’s expectations and requirements were critical for a successful outcome & patient satisfaction. This procedure prepares your tooth for a dental crown.It's helpful for a tooth that has lost so much of its natural crown that it can't support a dental crown. Most often, it's done on a tooth that has already had a root canal.
Because your tooth's nerves would have been removed during a root canal, you may not need any anesthetic for this procedure. But if you do have sensitivity, you are numbed. Next, your dentist carefully drills into the root of your tooth, removing some of the filling that was placed there during your root canal. This creates a channel deep into your tooth.
Placing the post
Then, your dentist selects a post to fit this channel. Some posts are made of metal. Others are made of resin mixed with strengthening fibers of quartz, glass, carbon or some other material.The post is screwed or cemented into the channel. The end of the post sticks out of your tooth.
Building the core
Next, your dentist builds up the space around the post with a composite material. It hardens, restoring some of your tooth's shape and height. And it creates a stable base.
Finally, your dentist makes a mold of your tooth so your crown can be made. You may be given a temporary crown and sent home. You'll come back for another visit to receive your permanent crown.
These posts come in several forms: parallel-wall smooth cylindrical shape, parallel-wall screw type, and screw type.Prefabricated posts can be divided into two basic categories: passive and active. A passive post does not impart any stress on the root on insertion, whereas an active post stresses the root on insertion.
In any situation, the key to success in a post-and-core restoration revolves around certain essential factors. The post should passively fit in a well-prepared proper-length post preparation that conserves the most tooth structure possible. The post space should be cleaned and dried, and the post properly cemented with an adhesive system. The core should be built up to meet the requirements of the preparation of the tooth being restored. Even with a tooth being restored with a post and core, critical to the success of the full-coverage restoration is ensuring an adequate ferrule exists on the remaining sound tooth structure. While the post and core is important for retention of the full-coverage restoration, ultimately the remaining tooth structure will determine the success of the restoration.