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Comparison between porcine acellular dermal matrix (Mucoderm®) versus connective tissue graft in the treatment of multiple gingival recessions associated with non-carious cervical lesion partially restored. A 2-year randomized clinical trial.

Grant number: 22/02611-6
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2022
Effective date (End): May 31, 2023
Field of knowledge:Health Sciences - Dentistry - Periodontology
Principal Investigator:Mauro Pedrine Santamaria
Grantee:Camila Martins Bonjorni
Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


The literature indicates a high prevalence of multiple adjacent gingival recessions which are often associated with no-carious cervical lesion (NCCL), resulting, thus, to a combined defect. This condition has a different treatment prognosis comparing with a gingival recession without wearing surface associated and frequently needs a surgical-restorative approach to achieve better aesthetic e functional results.Clinical studies assessed different surgical-restorative treatment options to lead to single recessions associated with NCCL. However, although they are a common finding, insufficient evidence is available in the literature concerning about the treatment of multiple adjacent gingival recessions associated with non-carious cervical lesions and the optimal clinical protocol for the treatment of these lesions has not been established. Thus, the aim of this study is to compare the 2year outcome of two different multidisciplinary protocols by means of a randomized controlled clinical trial. For such purpose, forty patients with multiple adjacent gingival recessions associated with NCCL will be enrolled and randomly allocated to one of the following groups: test group (n=20), partial restoration of cervical lesion and modified coronally advanced flap for root coverage associated with porcine acellular dermal matrix (MCAF+PR+CM) and control group (n=20), partial restoration of cervical lesion and modified coronally advanced flap associated with connective tissue graft (MCAF+PR+CTG). The two groups will be compared regarding the clinical parameters, among which bleeding on probing (BOP), biofilm accumulation (IP), clinical attachment level (CAL), recession reduction (RecRed), the percentage of combined defect coverage (%CDC). Patient-reported outcomes as postsurgery sequelae, pain, discomfort, oral function, interference with daily activities, the decrease of dentin hypersensitive and aesthetic will be gathered. A professional assessment will be carried out regarding the aesthetics parameters. All these evaluations will be performed at the baseline and 6 months and 2 years postoperatively. The parameters of height, width and depth of the cervical lesion (CLH, CLW and CLD), height and thickness of keratinized tissue (KTH and KTT), height and width of papillae (PH, PW), height of bone crest (HBN) and the margin position in the immediate postoperative period (MPIPP) will be placed as independent variables in a multiple linear regression model to evaluate their influence on the final outcome of the procedures.

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