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Related Concept Videos

Survival Tree01:19

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Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
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Related Experiment Video

Updated: Sep 15, 2025

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
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Root coverage in deep recessions with apex involvement: Long-term case study.

João Batista César Neto1, Rafael Lazarin1, Vitor Mota Freitas1

  • 1Department of Stomatology, Division of Periodontology, College of Dentistry, University of São Paulo, Sao Paulo, Brazil.

Clinical Advances in Periodontics
|July 17, 2025
PubMed
Summary
This summary is machine-generated.

This case study shows that surgical root coverage combined with connective tissue grafts and apicoectomy effectively treats deep gum recession with root exposure. These interdisciplinary treatments improve tooth prognosis and provide stable, long-lasting results.

Keywords:
apicoectomyautograftscase studygingival recessionroot coverage

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Area of Science:

  • Periodontology
  • Restorative Dentistry
  • Oral Surgery

Background:

  • Deep gingival recessions (GRs) with root apex exposure pose significant clinical challenges.
  • A multidisciplinary approach is often necessary to improve tooth prognosis in such cases.
  • This study focuses on seven teeth with deep GRs (≥5 mm) and exposed root apices.

Observation:

  • Teeth were treated with endodontic therapy, apicoectomy, and root coverage procedures.
  • Surgical techniques included the laterally positioned flap or modified double papilla flap with connective tissue grafts (CTG).
  • The mean follow-up period was 3.86 years, ranging from 1 to 11 years.

Findings:

  • A mean gingival recession reduction of 7.57 mm was achieved.
  • Complete root coverage was observed in four of the seven cases.
  • No teeth required extraction, and all demonstrated improved prognoses.

Implications:

  • Root coverage surgery combined with CTG and apicoectomy is effective for severe mucogingival defects.
  • This interdisciplinary approach can successfully alter tooth prognosis, offering a viable alternative to extraction.
  • The findings support prioritizing mucogingival procedures as a first-line treatment for deep gum recession with apex involvement.