Endodontic implants 607

the trouble probably has been induced by a hemorrhage around the nerve. Immediate extraction of the implant is not recommended. Paresthesia will usually disappear slowly and gradually. Only if it persists more than 1 week should steps be started to correct the situation.

If a stabilizer loosens in its tooth, it should be reinserted after cleaning and disinfecting the root canal. The reinsertion is almost painless.

In a few cases, the implants broke after insertion. This was probably a result of bubbles in the cast

metal. An implant must be cast in a vacuum and/or be checked by industrial radiography. It is also important, therefore, to seal the apices with chlorpercha or some other soft type of filling material. It is imperative to widen the canals of the maxillary and mandibular anterior teeth toward the palatal and lingual surfaces respectively, so that the endodontic stabilizer pins will enter the bone in these directions. If the pins are made to follow exactly the direction of the canals, they would often end up perforating the concave labial surfaces of the maxillae and mandible.