Reconstructive preprosthetic surgery using cryopreserved amn
This clinical trial showed significantly faster postoperative healing onset when acellular dermal matrix (ADM) was used than when cryopreserved human amniotic membrane (AM) was applied on the periosteum.

The aim of the present split-mouth randomized clinical study was to assess and compare the wound dressing properties of the acellular dermal matrix (ADM) and cryopreserved human amniotic membrane (AM) after reconstructive pre-prosthetic oral surgery.

Twenty-eight patients with complete mandibular edentulism and resorbed alveolar bone were included. After taking the mandibular impression, a clear acrylic splint with increased labial flange height was created. In each participant, labial vestibular depth was elevated using Clark's technique. Subsequently, half of the exposed periosteum was covered with ADM while the other half was covered with cryopreserved human AM.

Vestibule depth and relapse in the two sides were measured immediately after vestibuloplasty and at the end of the 1st week, 2nd week, 1st month, and 3rd months with graduations of 0.1 mm. Furthermore, after 3 and 7 days, samples were collected from graft material, and the macrophage population was analyzed by flow cytometry.

There was no significant difference in the relapse of vestibule depth between the two grafts at different time intervals. However, the frequency of wound-infiltrating macrophages (CD68+ cells) was significantly higher in areas covered by ADM after 3 and 7 days.

ADM is as effective as cryopreserved AM in terms of maintaining the postoperative vestibular depth. On the other hand, the results suggested that the onset of the healing phase in ADM-covered areas occurs faster compared to the periosteum covered with cryopreserved human AM.

Annals of Maxillofacial Surgery