Partially Porous-coated Dental Implants - 2 Year Human Clinical Trial Results
D.A. Deporter, R.M. Pilliar, P.A. Watson and M. Pharoah
Faculty of Dentistry, University of Toronto, Canada
AADR Abstr #1201 Dent Res 1992;71:256
We have previously reported on the design and testing in dogs of a new porous-surfaced, endosseous dental implant system (Deporter et al., 1986, 1988, 1990: Pilliar et al., 1990, 1991). The implant root component made from Ti-6A1-4V has a tapered, truncated-cone shape for ease of placement, and utilizes a powder-sintered porous surface topography over the majority of its length to promote fixation by bone ingrowth. In a first human clinical trial with this implant (Endopore?), we have placed 3 implants each in the anterior mandible of 52 edentulous individuals and used them to support mandibular overdentures. Data being collected include standardized radiographs (using a customized film holder connected to each implant) analyzed with computer-assisted techniques, and trace elements analyses of blood (using atomic absorption spectro-photometry) for Ti, Al and V. Two year results for more than half the patients and one year results for the remaining patients will be presented. As predicted from the animal work, crestal bone remodelling begins to level off by 12 months, and is not progressive beyond the coronal-most limit of the porous coat. No significant changes from baseline in bood levels of Ti, Al and V were observed.
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