Clinical longevities of ramus frame implants

A variety of ramus frame dental implant designs is indicated for endosseous restoration to retain lower dentures, and the different designs utilize various alloys. The objective of this study was to present an analysis of the clinical applications for ramus frame dental implants with emphasis on the statistics of clinical longevities. The investigation involved an extensive statistical evaluation and, when possible, metallographic, scanning electron microscopic, histological, mechanical, and stereomicroscopic surface evaluations. The statistical analysis presents averages and percentages of devices in place vs. devices removed. Analyses of survival probability were also determined by means of the Kaplan-Meier statistical methods. A comparison of these results with the general criteria listed in the Harvard Conference shows that more than 75% of the implant devices were in place after five years.