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Guided tissue regeneration-based root coverage: meta-analysis.

Khalid Al-Hamdan1, Robert Eber, David Sarment

  • 1Department of Periodontics/Prevention/Geriatrics, School of Dentistry, University of Michigan, Ann Arbor, MI 48109, USA.

Journal of Periodontology
|December 5, 2003
PubMed
Summary
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Guided tissue regeneration-based root coverage (GTRC) successfully repairs gingival recession. However, conventional mucogingival surgery offers superior root coverage and keratinized gingiva width.

Area of Science:

  • Periodontology
  • Regenerative Medicine
  • Oral Surgery

Background:

  • Gingival recession necessitates root coverage for new attachment formation.
  • Previous guided tissue regeneration-based root coverage (GTRC) studies often lacked sufficient sample sizes for robust conclusions.
  • Meta-analysis is needed to compare GTRC with conventional periodontal plastic surgery.

Purpose of the Study:

  • To conduct a meta-analysis of existing GTRC studies.
  • To determine if GTRC yields significantly improved clinical outcomes compared to conventional periodontal plastic surgery for treating marginal tissue recession.

Main Methods:

  • A systematic literature search identified GTRC studies from 1990-2001.
  • Data were analyzed comparing GTRC with conventional mucogingival surgery (CMGS), considering membrane type, root conditioning, recession depth, bone replacement grafts, and funding.

Related Experiment Videos

  • Weighted means were used for meta-analysis, with paired t-tests for statistical significance.

    • Main Results:

    • GTRC achieved an average 74% recession depth reduction, 41% complete root coverage, 3 mm AL gain, and 1 mm KG gain.
    • Both GTRC and CMGS significantly improved outcomes from baseline.
    • CMGS demonstrated statistically superior results in keratinized gingiva gain (2.1 mm vs. 1.1 mm), root coverage (81% vs. 74%), and complete root coverage rates (55% vs. 41%).

    Conclusions:

    • Guided tissue regeneration-based root coverage is effective for repairing gingival recession defects.
    • Conventional mucogingival surgery provides statistically superior outcomes for root coverage and keratinized gingiva width.
    • Factors like absorbable membranes and shallow recession depth positively influenced complete root coverage in GTRC.