Purpose: to describe the Masserann technique for the removal of fractured posts in endodontically treated teeth
•Often, a clinical examination will reveal a fractured parapost at the cervical portion of the crown, with gingival hyperplasia covering a part of the exposed root (Figs. 1 and 2).
•After anesthesia, the root is exposed with electrosurgery to gain access. From the Masserann Kit (Fig. 3), the appropriate size trepan bur is determined by a gauge supplied in the kit.
•Since the trepan burs are hollow end-cutting tubes, they fit over the end of the post and slide down its outside. The instrument is turned by hand cutting a small trench around the post.
• After proceeding from one third to one half the way down the post, the trepan bur is replaced with the next smaller size, which will grip the end of the post to lift it out of the canal.
• After the parapost is removed (Fig. 4), the root canal is enlarged with a Peeso reamer so that a conventional cast post and core can be made (Fig. 5). Later an appropriate crown can be made for the tooth (Figs. 6 and 7).
The advantages of this technique are that
(1) it is simple,
(2) little heat is generated,
(3) there is no danger of pushing fragments further into the root, and
(4) excessive forces are eliminated with little chance of perforation or splitting the root.