Abstract:

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.

Keywords: overdentures; titanium implants; osseoinfegration; bone resorption

Document Type: Research article

DOI: 10.1034/j.1600-0501.1999.100406.x

Affiliations: 1: The Department of Oral Function, Academic Centre for Dentistry Amsterdam, Dental School, The Netherlands; 2: Department of Medical Statistics, University of Nijmegen, The Netherlands; 3: The Department of Oral and Maxillofacial Surgery and the Department of Special Dental Care and Maxillofacial Prosthodontics, The lgnatius Teaching Hospital, Breda, The Netherlands; 4: The Department of Oral Function, University of Nijmegen Dental School, The Netherlands