PERIO - Periodontal Practice Today 5 (2008), No. 4 4. June 2009
PERIO - Periodontal Practice Today 4 (2007), No. 1 (09.03.2007)
A 36-month randomised controlled prospective clinical study of a conventional and a new surgical approach for root coverage with the acellular dermal matrix graft
Barros, Raquel RM / Novaes Jr, Arthur B. / Palioto, Daniela B. / Souza, Sérgio L. S. / Taba Jr, Mário / Grisi, Márcio FM
Background: Long-term evaluation of gingival recession treatment is important for clinical decisionmaking. The aim of this clinical trial was to evaluate the acellular dermal matrix graft (ADMG) in the treatment of gingival recessions over a 3-year follow-up period, comparing a new surgical approach (test group) to a conventional procedure (control group).
Study design: A total of 28 bilateral Miller Class I or II gingival recessions were selected and randomly assigned to test and control groups. Gingival recession, width of keratinised tissue, probing depth and relative clinical attachment level were assessed at baseline, 12 months and 36 months post-surgery.
Results: Although both procedures improved all the evaluated parameters for all periods, comparisons between the groups revealed statistically significant greater recession reduction favouring the new technique from baseline to the 12-month evaluation and from baseline to the 36-month evaluation (p = 0.000). Statistically significant differences were not found between the 12-month and the 36- month evaluations; however, the root coverage obtained with the conventional technique decreased from 60% at 1 year to 58% at 3 years, while for the new technique it remained stable at approximately 83% over 3 years.
Conclusion: The new technique is more suitable for root coverage with ADMG when compared with the conventional procedure, showing a statistically significant better clinical performance that was maintained over a 3-year period.
Keywords: acellular dermal matrix, randomised clinical study, root coverage