Amnion as a prosthetic material in congenital defects

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Pediatric Surgery

Background:

• Autologous amniotic membrane grafts are utilized in pediatric surgery for large ventral abdominal clefts.
• The optimal component and application method for amniotic membrane implants remain under investigation.
• Amniotic membranes comprise amnion, chorion (fetal origin), and decidua (maternal origin).

Purpose of the Study:

• To evaluate the utilization and foreign-body reaction (FBR) of fetal amniotic membrane components as implants.
• To determine the best anatomical parts of the amniotic membrane for implantation in a rat model.

Main Methods:

• A standardized rat model was used to implant fetal parts of the amniotic membrane.
• Macroscopic, light microscopy, and immunohistology assessments were performed at 15, 30, and 90 days post-implantation.
• Evaluation focused on graft integration, resorption, neovascularization, and FBR.

Main Results:

• Adhesions to abdominal organs and omentum were observed regardless of implant orientation.
• Amnion elicited a rapid FBR that decreased over time.
• Chorion and parts of the amnion demonstrated resorption, cellular infiltration, and neovascularization within 90 days.

Conclusions:

• The fetal components of the amniotic membrane, specifically amnion and chorion, are suitable for implantation.
• Optimal results are achieved by using amnion and parts of the chorion, minimizing foreign-body reactions and promoting tissue integration.