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Since the introduction of implants in Dentistry, controversies have arisen about the possibility of connecting implants to teeth in fixed prostheses. Osseointegrated implants do no present any periodontal ligature and are more firmly anchored to the bone. The difference presented by this type of anchorage has led to some concern about the limited flexibility of the osseointegrated implant to share the functional loads with the connected teeth. This study intended to follow-up prospectively the periodontal parameters bleeding index, probing depth between the pillar tooth of an implant supported prosthesis with one control tooth of the same patient and also the implants that support theses prostheses. That is why subtraction radiography of the region in which the prosthesis was placed was used, with radiographs taken at prosthesis placement, after six months and one year of use to verify if the periimplant osseous support had or had not undergone changes. Twelve patients with normal health conditions were selected who presented a posterior area edentulous jaw where a prosthetic rehabilitation by a fixed prosthesis joining tooth to implant was indicated. Patients were treated with an implant of one stage of 10mm standard Straumann (ITI) with a 2.8 mm polished neck, in which the remaining intraosseous portion of the implant has a treated surface of 4.1 mm diameter. The implant was placed in the space where according to the protocol, the more distal retainer of the future fixed partial prosthesis would be located. Digital radiographs were assessed with a subtraction radiography software Matrox Inspector version eight, to corroborate the change of contrast in the radiographs when superimposed, with values observed in the implant compared with the success criteria , widely mentioned in surveyed studies. All implants placed in patients became osseointegrated. There was no record of bone change around them and in the dental pillars of the prostheses at the one year follow-up. Prostheses continue to be in excellent conditions after the one year follow-up based upon clinical and radiographic analyses. Furthermore, in accordance with the Wilcoxon test of matched pairs and signed rank, it was concluded that there was no statistical difference between each group of each patient during the time period analyzed (baseline and one year) as well as when the pillars were compared to their respective controls.

"Estudo prospectivo dos parâmetros periodontais e peri-implantares dos pilares que recebem prótese dento-implanto-suportada"