Efficacy of collagen matrix seal and collagen sponge on ridge preservation in combination with bone allograft: A randomized controlled clinical trial.

Abstract

To test whether the use of collagen matrix seal (CMS) results in similar hard and soft tissue remodelling to that with collagen sponge (CS) used as barriers 4months following alveolar ridge preservation (ARP), in combination with freeze-dried bone allograft (FDBA). Twenty-eight patients were randomly assigned to the two groups. Clinical and radiographic measurements were recorded with the same stent at baseline and 4months for standardization. The flapless technique following a traumatic extraction was used for the two types of barriers. All patients completed the study, 14 in the CMS group and 14 in the CS group. Reduction in coronal ridge width (1.21mm-14.91% CMS and 1.47mm-20.40% CS) and vertical buccal bone resorption (0.30mm CMS and 0.79mm CS) were not significantly different. A slight increase in buccal gingival thickness at the coronal part was observed in both groups (0.9mm CMS and 0.5mm CS). Collagen matrix seal and CS, when combined with FDBA, significantly minimized ridge resorption in all dimensions and maintained buccal soft tissue thickness in sockets with a buccal plate loss of <2mm in comparison to previously reported findings recorded after tooth extraction without ARP.