Tenting effect of the elevated sinus membrane over an implant with adjunctive use of a hydroxyapatite-powdered collagen membrane in rabbits

Authors

  • Ui-Won Jung,

    1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea
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    • These authors contributed equally to this study.
  • Otgonbayar Unursaikhan,

    1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea
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    • These authors contributed equally to this study.
  • Jin-Young Park,

    1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea
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  • Jung-Seok Lee,

    1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea
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  • Jamiyandorj Otgonbold,

    1. Department of Prosthodontics and Orthodontics, School of Dentistry, Health Science University, Ulaanbaatar, Mongolia
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  • Seong-Ho Choi

    Corresponding author
    1. Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, Korea
    • Corresponding author:

      Seong-Ho Choi

      Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Korea

      Tel.: +82 2 22283189

      Fax: +82 2 3920398

      e-mail: shchoi726@yuhs.ac

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Abstract

Purpose

The aim of this study was to determine the de novo bone formation beneath the Schneiderian membrane supported by an implant and with the adjunctive use of a hydroxyapatite-powdered collagen (HAC) membrane without bone grafting in rabbit sinuses.

Material and methods

After sinus-floor elevation procedure, an experimentally devised mini-implant (4 mm in length and 3 mm in diameter) was placed in eight rabbits. For the experimental group, an HAC membrane was placed onto the elevated sinus mucosa prior to implant placement. The animals were allowed a healing period of either 4 or 8 weeks. Microcomputed tomography and histologic analyses were performed.

Results

All implants placed at the thin lateral bony wall were histologically osseointegrated. The topography of the newly formed bone appeared to slope gently from the medial side down to the lateral side. The volume of new bone was significantly greater in the experimental group than in the control group at 4 weeks (< 0.05), but not at 8 weeks. However, none of the samples in the two groups was entirely covered to the apex by bone tissue.

Conclusions

It can be concluded that using the HAC membrane in combination with placement of an implant resulted in substantial bone formation around the implant, which might have been influenced by the proximity of the axial bony wall.

Ancillary