Mucogingival Versus Guided Tissue Regeneration Procedures in the Treatment of Deep Recession Type Defects

G. Zucchelli, C. Clauser, M. De Sanctis, M. Calandriello

Research output: Contribution to journalArticlepeer-review

Abstract

THE OBJECTIVE OF THE STUDY was to compare the clinical efficacy of 3 surgical approaches in the treatment of deep recession type defects. Fifty-four (54) gingival recessions ≥ 5 mm were randomly assigned to 1 of the 3 treatment groups by blocking the prognostic variables. The first group was treated with a guided tissue regeneration (GTR) procedure using a bioabsorbable membrane, the second with non-resorbable membrane, and the third with a mucogingival surgical approach consisting of a connective tissue graft combined with a coronally advanced flap (bilaminar technique). No differences, in terms of baseline oral hygiene and defect characteristics, were observed among the 3 groups showing an effective blocking approach. The 1-year results indicated that 1) all treatment approaches resulted in clinically significant root coverage and attachment gain; 2) a statistically significant treatment effect (P = 0.012, ANOVA) was observed comparing the bioabsorbable (4.9 ± 0.3 mm), the non-resorbable (4.5 ± 0.8 mm), and the bilaminar (5.3 ± 0.7 mm) groups, in terms of root coverage; 3) the difference in terms of root coverage between the bilaminar and the non-resorbable membrane groups was statistically significant while differences between the 2 GTR groups or between the bilaminar and the bioabsorbable membrane groups did not reach statistical value; 4) the 95% confidence intervals for the proportions of complete successes showed a similar pattern; 5) no statistical difference was demonstrated in the amount of attachment gain among the 3 groups (P = 0.73, ANOVA). A regression model showed that the amount of root coverage was significantly affected by the initial recession depth, the procedure and smoking habits: a poorer root coverage result is expected in case of shallow recession type defects, when either bioabsorbable (P <0.05) or non-resorbable (P <0.001) membranes are used instead of a bilaminar technique and if the patient smokes (P <0.01). It was concluded that the mucogingival bilaminar technique is at least as effective as GTR procedures in the treatment of gingival recession ≥ 4 mm and thus recession depth is not the parameter which influences the selection of the surgical procedure.

Original languageEnglish
Pages (from-to)138-145
Number of pages8
JournalJournal of Periodontology
Volume69
Issue number2
Publication statusPublished - Feb 1998

Keywords

  • Flap surgery
  • Gingival recession/surgery
  • Gingival recession/therapy
  • Grafts, gingival
  • Guided tissue regeneration
  • Membranes, artificial

ASJC Scopus subject areas

  • Dentistry(all)

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