Clinical and radiological results of patients treated with three treatment modalities for overdentures on implants of the ITI® Dental Implant System. A randomized controlled clinical trial

In a randomized controlled clinical trial carried out at the Ignatius teaching hospital in Breda, The Netherlands, I10 edentulous patients with severe mandibular bone loss were treated with implants of the ITI® Dental Implant System using 3 different treatment strategies: a mandibular overdenture supported by either 2 implants with ball attachments, 2 implants with an interconliecting bar, or by 4 interconnected implants. In this study, results of clinical and radiographic parameters were evaluated and compared over a period of 19 months after implant placement. A total of 283 ITP Dental Implants were placed. Six implants (2%) were lost during the osseointegration period. No further implant losses occurred after that, At the 19 month evaluation mean values and standard deviations for bleeding index were 0.51±0.5 (bleeding incidence=70%) and for plaque index they were 0.46±0.5 (plaque incidence=45%). The mean values and standard deviations for probing depth and loss of attachment were 2.7±1.1 mm and 0.26±O.6 mm respectively. The radiographic evaluation showed a mean bone loss of 1.5 mm± 0.26 after 19 months for all the implants. In cases with 4 interconnected implants there was significantly more bone loss around the central 2 implants (2.1±0.31 mm) in comparison with the lateral 2 (1.4±0.25 mm). No significant correlations were found between plaque and bleeding indices and bone loss.