Ideazione e progettazione di un clinical trial in implantologia orale

A total of 97 (in 43 patients) Nobel Replace implants of various diameters and length were placed: 42 in mandibles and 45 in maxillas. The implant types and dimensions, insertion torque, surgery technique and bone quality and quantity (according to Lekholm and Zarb s classification) were recorded at the time of implant placement for each individual site. Intraoral radiographs from the time of implant placement and at the 6-month (upon delivery of the final prosthesis) and 1-2 year follow-up visits were taken for evaluation. The cumulative survival rate was 96.8% for all implants after 1 year. The mean marginal bone loss during 1 year follow-up after implant placement was 1.36 mm. All failures but one occurred before the final prostheses were placed. The outcome of the present prospective 1-year study indicates that Nobel Biocare Replace implant system showed a high reliability. We aim to complete the 5 years of follow-up in the 21 clinics involved in order to obtain the largest sample possible.