Abstract : This study was designed to investigate the histological and hsitomorphometric changes in the sockets of third premolar teeth of dogs after being packed with dense PTFE, after one and two months from dental extraction. Four adult local breed male dogs were hunted from the street and selected for the study. The lower third premolar teeth of each dog were extracted surgically. The left third premolar socket of each dog was left as control while the right third premolar socket was packed with dense PTFE membrane. Two dogs were sacrificed after one month, and the other two dogs were sacrificed after two months from the surgical operation. The site of surgical extraction was sectioned and studied for histological and histomorphometric outcomes. The buccal and lingual alveolar width were non-significantly differed between d-PTFE treated sockets and control after one and two months. The percentage of bone was also comparable between the two groups. The use of d-PTFE membrane had no influence on bone healing.