Use of a Novel Volume-stable Collagen Matrix (VCMX) in the Treatment of Single Gingival Recession Associated With Non-carious Cervical Lesion Partially Restored

Use of a Novel Volume-stable Collagen Matrix (VCMX) in the Treatment of Single Gingival Recession Associated With Non-carious Cervical Lesion Partially Restored. A Randomized Clinical Trial

Gingival recessions (GR) are often associated with non-carious cervical lesions (NCCL), resulting, thus, in a combined defect. This mucogingival condition has a different treatment prognosis when compared with a GR without wearing surface associated and frequently requires a surgical-restorative approach to achieve better esthetics and functional results. A limited number of clinical studies assessed different multidisciplinary protocols for the management of single combined defects and there is evidence that the use of dental materials does not harm the periodontal tissues and does not influence the root coverage obtained by means of subepithelial connective tissue graft (CTG). Although the association between coronally advanced flap (CAF) and CTG provides more predictable and stable outcomes in the long term, its use is related to some drawbacks. Different biomaterials have been developed to overcome these limitations as a possible alternative to autogenous graft. However, despite its potential, there is a lack of studies evaluating its use in treating this type of condition. Thus, this study aims to assess from a clinical and esthetics point of view and patient-centered outcomes, the use of a new collagen matrix (Geistlich Fibro-Gide®) associated with CAF for the management of single combined defects. For such purpose, 50 patients with single RT1 gingival recessions associated with NCCL will be enrolled and randomly allocated to one of the following groups: control group (n=25), partial restoration of cervical lesion and coronally advanced flap for root coverage (PR+CAF) and test group (n=25), partial restoration of cervical lesion and coronally advanced flap associated with volume stable collagen matrix (PR+CAF+VCMX). 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), and the percentage of combined defect coverage (%CDC). Patient-reported outcomes such as post-surgery pain and discomfort, time to recover, the decrease of dentin hypersensitive, and aesthetics will be gathered. A professional assessment will be carried out regarding the aesthetic parameters. All these evaluations will be performed at the baseline and three and six months postoperatively.

Inclusion Criteria:

• adult > 20 years old;
• systemically healthy
• no signs of active periodontal disease;
• full-mouth plaque and bleeding score ≤20%;
• Gingival recession type RT1 associated with NCCL B+ on a vital canine or premolar;

Exclusion Criteria:

• Patients who had had periodontal surgery on the study area;
• Smokers patients;
• Pregnant or lactating patients;
• Ongoing orthodontic treatment;
• Patients taking medications known to interfere with the wound healing process or that contraindicate the surgical procedure