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Two-part implants inserted in a one-stage or a two-stage procedure. A prospective comparative study.

Kees Heydenrijk·Gerry M Raghoebar·Henny J A Meijer·Willy A Van Der Reijden·Arie-Jan Van Winkelhoff·Boudewijn Stegenga
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Abstract

OBJECTIVE: The aim of this study was to evaluate the feasibility of using a two-part implant system in a one-stage procedure and to monitor the microflora in the peri-implant area in relation to clinical and radiographic outcome. MATERIAL AND METHODS: After randomisation, 40 edentulous patients (Cawood & Howell class V-VI) received two IMZ implants in the anterior mandible inserted by either a one-stage (n = 20) or a two-stage (n = 20) surgical procedure for overdenture treatment. A standardised clinical and radiographic evaluation was performed after denture insertion as well as 6 and 12 months thereafter. Twelve months after loading, peri-implant samples were collected and analysed for the presence of putative periodontal pathogens using culture technique. RESULTS: No striking differences were found between the two groups with regard to the clinical parameters during the evaluation period. The mean bone loss in the first year of functioning was 0.6 mm in both groups. With regard to the gingiva score, plaque score, bleeding score or bone loss between T0 and T12, no associations were found with the presence of the cultured microorganisms. An association was present between pockets >or= 4 mm and the presence of Peptostreptococcus micros in the two-stage group. CONCLUSIONS: The short-term results indicate that two-part implants inserted in a one-stage procedure may be as predictable as inserted in the common two-stage procedure. The peri-implant sulcus can and does harbour potential periodontal pathogens without significant signs of tissue breakdown.

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Colony Count, MicrobialDental Implantation, EndosseousDental ImplantsDental Plaque IndexDental Prosthesis DesignDental Prosthesis RetentionDental Prosthesis, Implant-SupportedDental Restoration FailureDenture, OverlayFeasibility StudiesFemaleGingivaGram-Negative Anaerobic BacteriaHumansJaw, EdentulousMaleMandibleMiddle AgedPeriodontal IndexProspective StudiesRadiographyRegression AnalysisStatistics, NonparametricClinical TrialJournal ArticleRandomized Controlled TrialResearch Support, Non-U.S. Gov't

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Kees Heydenrijk, Gerry M Raghoebar, Henny J A Meijer, Willy A Van Der Reijden, Arie-Jan Van Winkelhoff, Boudewijn Stegenga. 2002. Two-part implants inserted in a one-stage or a two-stage procedure. A prospective comparative study.. https://doi.org/10.1034/j.1600-051x.2002.291005.x

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