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Clinical Oral Implants Research

Is furcation involvement in maxillary molars a predictor for subsequent bone augmentation prior to implant placement? A pilot study

Authors

  • Clemens Walter,

    1. Department of Periodontology, Endodontology and Cariology, University of Basel, Basel, Switzerland
    2. Department of Oral Surgery, School of Dentistry, University of Birmingham, Birmingham, UK
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  • Dorothea C. Dagassan-Berndt,

    1. Department of Oral Surgery, Oral Radiology and Oral Medicine, University of Basel, Basel, Switzerland
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  • Sebastian Kühl,

    1. Department of Oral Surgery, Oral Radiology and Oral Medicine, University of Basel, Basel, Switzerland
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  • Roland Weiger,

    1. Department of Periodontology, Endodontology and Cariology, University of Basel, Basel, Switzerland
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  • Niklaus P. Lang,

    1. Department of Crown & Bridge and Removable Prosthodontics and Dental Material Sciences, University of Zurich, Zurich, Switzerland
    2. The University of Hong Kong, Hong Kong SAR, China
    3. Professor Emeritus University of Berne, Berne, Switzerland
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  • Nicola U. Zitzmann

    Corresponding author
    1. Department of Periodontology, Endodontology and Cariology, University of Basel, Basel, Switzerland
    • Corresponding author:

      Prof. Dr Nicola U. Zitzmann

      Department of Periodontology, Endodontology and Cariology

      University of Basel

      Hebelstrasse 3, 4056 Basel, Switzerland

      Tel.: +41 61 2672613

      Fax: +41 61 2672659

      e-mail: n.zitzmann@unibas.ch

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Abstract

Aim

The aim of this pilot study was to analyze the interfurcal bone height in relation to the possible need for subsequent sinus floor elevation in patients with advanced periodontitis and furcation involvement of first and/or second maxillary molars.

Material and methods

Seventeen dentate patients, who received cone beam computed tomography (CBCT) for detailed preoperative diagnosis and planning of surgical interventions at periodontally involved maxillary molars (17 first and 15 second molars), were consecutively recruited for the study. The minimal bone height in the interfurcal region was measured from CBCT and related to furcation involvement, residual bone above the root tips, and the clinical probing pocket depth (PPD).

Results

The minimal interfurcal bone height measured 4.1 ± 2.6 mm on average with 75% of maxillary molars having ≤6 mm and almost 60% having only ≤4 mm bone height left below the sinus floor. A higher risk for reduced interfurcal bone height of ≤4 mm was given when residual PPD of ≥6 mm was remaining at two or more tooth sites (OR 0.10; 0.11).

Conclusions

The majority of periodontally involved maxillary molars had a substantially reduced interfurcal bone height, particularly with at least two sites with residual PPD ≥ 6 mm. This was a predictor for a subsequent need for sinus floor elevation when tooth replacement with a dental implant is desired.

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