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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Acellular dermal matrix allograft versus free gingival graft: a histological evaluation and split-mouth randomized clinical trial

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Author(s):
Benchimol de Resende, Daniel Romeu ; Aguiar Greghi, Sebastiao Luiz [1] ; Siqueira, Aline Franco ; Magalhaes Benfatti, Cesar Augusto [2] ; Damante, Carla Andreotti [1] ; Ragghianti Zangrando, Mariana Schutzer [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont & Periodont, Al Octavio Pinheiro Brisolla 9-75, BR-17012901 Bauru, SP - Brazil
[2] Univ Fed Santa Catarina, UFSC, Dept Dent, Campus Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CLINICAL ORAL INVESTIGATIONS; v. 23, n. 2, p. 539-550, FEB 2019.
Web of Science Citations: 3
Abstract

ObjectivesThis split-mouth controlled randomized clinical trial evaluated clinical and histological results of acellular dermal matrix allograft (ADM) compared to autogenous free gingival graft (FGG) for keratinized tissue augmentation.Material and methodsTwenty-five patients with the absence or deficiency of keratinized tissue (50 sites) were treated with FGG (control group) and ADM (test group). Clinical parameters included keratinized tissue width (KTW) (primary outcome), soft tissue thickness (TT), recession depth (RD), probing depth (PD), and clinical attachment level (CAL). Esthetic perception was evaluated by patients and by a calibrated periodontist using visual analog scale (VAS). Histological analysis included biopsies of five different patients from both test and control sites for each evaluation period (n=25). The analysis included percentage of connective tissue components, epithelial luminal to basal surface ratio, tissue maturation, and presence of elastic fibers. Data were evaluated by ANOVA complemented by Tukey's tests (p<0.05).ResultsAfter 6months, PD and CAL demonstrated no differences between groups. ADM presented higher RD compared to FGG in all periods. Mean tissue shrinkage for control and test groups was 12.41 versus 55.7%. TT was inferior for ADM group compared to FGG. Esthetics perception by professional evaluation showed superior results for ADM. Histomorphometric analysis demonstrated higher percentage of cellularity, blood vessels, and epithelial luminal to basal surface ratio for FGG group. ADM group presented higher percentage of collagen fibers and inflammatory infiltrate.ConclusionsBoth treatments resulted in improvement of clinical parameters, except for RD. ADM group presented more tissue shrinkage and delayed healing, confirmed histologically, but superior professional esthetic perception.Clinical relevanceThis study added important clinical and histological data to contribute in the decision-making process between indication of FGG or ADM. (AU)