The Effects of Peri-implantitis on Hydroxyapatite Coated Dental Implant Systems

Overview

Objectives/Goals The purpose of this study was to find which hydroxyapatite coated root form dental implant system was most resistant to the acidic environment produced by peri-implantitis. Methods/Materials Eight root form dental implants from Centerpulse, Steri-Oss, Spectra System, and a new, "generic" company were acquired, weighed, placed in a 25 percent citric acid solution (to simulate the conditions of the acidic exudates that surround the implant during peri-implantitis), then taken out and weighed at ten minute increments. The implants were weighed six times for a total of 60 minutes in solution. The final weight of the implants with the hydroxyapatite coating completely dissolved was used to calculate the rate of deterioration as a percentage. These measurements were used to find the average failure time of each implant, with failure point set at a two-thirds loss of hydroxyapatite. Results The Centerpulse and Steri-Oss implant samples failed at an average time of 40 minutes in solution; while the Spectra implants failed at 30 minutes and the generic failed at 20 minutes in solution. Conclusions/Discussion This study suggests that implant systems vary in their response to the acidic environment produced by peri-implantitis and that the coating of the hydroxyapatite is more superior in some implant systems than others. Due to the high cost of dental implants the sample size for my study was small, hindering the statistical significance.

Awards (1)

• Category Award

Competition history

• CSEF 2003 Materials Science (Junior Division Only) · Entry J1115

Resources

• CSEF project summary ↗

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