New surgical approach for root coverage of localized gingival recession with acellular dermal matrix: a 12-month comparative clinical study.
BACKGROUND
Acellular dermal matrix graft (ADMG) has been used as an advantageous substitute for autogenous subepithelial connective tissue graft (SCTG). However, the surgical techniques used were primarily developed for the SCTG, and they may not be adequate for ADMG since it has a different healing process than SCTG owing to its different vascular and cellular structures. This study compared the 1-year clinical outcome of a new surgical approach with the outcome of a conventional procedure for the treatment of localized gingival recessions, both performed using the ADMG.


METHODS
The clinical parameters-probing depth, relative clinical attachment level, gingival recession (GR), and width of keratinized tissue-of 32 bilateral Miller Class I or II gingival recessions were assessed at baseline and 12 months postoperatively.


RESULTS
Significant clinical changes for both surgical techniques were achieved after this period, including GR reduction from 3.4 mm presurgery to 1.2 mm at 1 year for the conventional technique and from 3.9 mm presurgery to 0.7 mm at 1 year for the new technique. The percentage of root coverage was 62.3% and 82.5% for the conventional and new techniques, respectively. Comparisons between the groups after this period by Mann-Whitney rank sum test revealed statistically significant greater reduction of GR favoring the new procedure (p = .000).


CONCLUSIONS
Based on the results of this study, it can be concluded that a new surgical technique using an ADMG is more suitable for root coverage when compared with the conventional technique. The results revealed a statistically significant improvement in clinical performance with the ADMG approach.
Department of Bucco-Maxillo-Facial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirã Preto, University of São Paulo, Brazil.
Raquel R M
RR
Barros
Arthur B
AB
Novaes
Márcio F M
MF
Grisi
Sérgio L S
SL
Souza
Mário
M
Taba
Daniela B
DB
Palioto
D000328:Adult; D001672:Biocompatible Materials / Q000627:therapeutic use*; D003094:Collagen / Q000627:therapeutic use*; D005889:Gingival Recession / Q000601:surgery*; D006801:Humans; D018709:Statistics, Nonparametric; D013524:Surgical Flaps; D013997:Time Factors; D014092:Tooth Root / Q000601:surgery
C440568:Alloderm; D001672:Biocompatible Materials; D003094:Collagen