The flapless approach with and without enamel matrix derivatives for the treatment of intrabony defects: A randomized controlled clinical trial

Aim: To compare the clinical and radiographic outcomes of flapless procedure alone or in combination with enamel matrix derivatives (EMD) in the treatment of deep intrabony defects. Materials and Methods: Forty-six patients re-evaluated after non-surgical therapy were randomly assigned to the test (flapless with EMD) or control group (flapless alone). Clinical measurements were recorded pre-surgery and at 6 and 12 months after surgery, and radiographic measurements were taken pre-surgery and after 12 months. Results: Forty-six patients completed the study. Improvements were observed in both groups at 12 months for mean clinical attachment level (CAL) gain, with significant differences between test (3.9 +/- 1.1 mm) and control groups (3.0 +/- 1.2) (p = .017). Probing pocket depth (PPD) reduction (4.0 +/- 0.7 vs. 3.3 +/- 1.4 mm) was also near to statistical significance (p = .051). Also, more sites achieved successful composite outcome measure (final PPD <= 4 mm and CAL gain >= 3 mm) for the regenerative treatment in the flapless + EMD group (82.6% vs. 52.2%; p = .028). In terms of radiographic outcomes, EMD yielded a greater defect bone fill than flapless treatment alone (3.0 +/- 1.0 mm vs. 1.8 +/- 1.5 mm; p < .001). Conclusions: The additional application of EMD during the flapless procedure for intrabony defects slightly improved clinical and radiographic outcomes. identification number: NCT05456555.