BONE IMPLANT AUGMENT METHOD AND APPARATUS

摘要

An offset of a bone implant relative to a bone can be adjusted using cured PMMA inserts. One or more PMMA inserts can be used to change the offset distance and/or angle of a implant relative to the bone. During a bone implant surgery, if excessive bone has been removed, PMMA inserts can be inserted into the bone to build up the resection surface of the bone. A trial implant can be placed on the PMMA inserts to trial the offset. When the trial is passed, liquid PMMA cement can be applied to form a chemical bond with the PMMA inserts and forma mechanical bond between the implant and the bone.

主权项

1. A method for securing an implant to a bone of a patient comprising:
providing a cured polymethyl methacrylate (PMMA) insert having a stem; inserting the stem of the PMMA insert into a resection surface of the bone wherein a portion of the PMMA insert extends out of the resection surface of the bone; placing the implant against the portion of the PMMA insert extending from the resection surface of the bone to maintain a fixed length offset of the implant relative to the resection surface of the bone; applying a liquid PMMA to the PMMA insert, the bone and the implant; and curing the liquid PMMA to chemically bond to the PMMA insert and mechanically secure the implant to the bone.