Hydroxyapatite-augmented sites as receptors for replacement implants.

Implant failures can arise from a variety of conditions. Damage to the tissue structures at surgical placement, inadvertent stress distribution to the marginal bone, unfavorable arch relationships between the maxilla and mandible, occlusal trauma, inadequate prosthetic design, and improper oral hygiene are but a few of the problems that can result in ultimate damage and loss. The use of hydroxyapatite to restore bone contour and health can allow for replacement of a dental implant reconstruction. This paper will describe the use of porous hydroxyapatite to create proper bone morphology for the placement of IMZ osteointegrated dental implants in an edentulous maxilla and a mandibular distal edentulous area. Both cases are followed from the removal of previously placed blade-type implants to the reconstruction by use of the IMZ osteointegrated system within the hydroxyapatite-contoured ridges.