|
The purpose of this study is to evaluate the success rate of the Osstem® US II(Osstem, Co. Seoul Korea) placed in the edentulous area of type 4 bone quallity. 178 US II implants that had been inserted between 1997 and 2005 were followed up for mean 29.4 months. With medical records and radiograghs we analysis the distribution of patients' age and gender, position of implant, the kind of surgical technique, the type of prostheses, amount of bone resorption survival rate and success rate of implants. From these analysis we got the following results. In the distribution of implants by site, 167 implants were placed on maxilla and only 11 implants on mandibule. And the resorption of crestal bone more than 1mm was measured at only 5 implants. The mean plaque, gingival inflammatory and calculus index were measured 0.56, 0.31, 0.01. The survival rate was 100% and success rate was 98.8% during 29.4 months of mean following up period. As a result, we got the excellent clinical results of US II implant system at bone quallity of type 4.
|