In the assessment of patency of a small vessel anastomosis, micro-arteriography using dental X-ray and film was used as a method of testing the patency of arterial anastomoses in the rat. Micro-arteriography could lead to an objective evaluation of the patency in End-to-End and End-to Side anastomoses. The method used in this study is easily accessible for Oral and Maxillo-facial surgeon to practice the microvascular anastomosis, and requires materials available in every dental clinic.