A multicenter prospective study in type IV bone of a single type of implant.

ABSTRACT

PURPOSE: To analyze the success and survival rates of the Osstem GSII (Osstem, Busan, Korea) implant in type IV bone. MATERIALS A prospective, multicenter (5 centers) study was conducted by examining the relationship between implant success and survival rates, and several patient and surgical parameters. The implants were placed in 82 patients who visited several nationwide dental hospitals and clinics between 2007 and 2008, followed by clinical and radiographic analyses. RESULTS: In type IV bone, the implant success and survival rates were 93.23% and 95.83%, respectively. The maxillary premolar and mandibular anterior tooth areas showed success rates of 100%. The most widely used implant diameter and length was 5.0 and 13 mm, respectively, but the diameter and length had no effect on success rates. However, success rates appeared to decrease with age. CONCLUSIONS: The results indicated that the Osstem GSII implant is highly effective in poor-quality type IV bone.