A comparative study was conducted on the healing process of the dental socket after simple extraction or extraction after bony plate removal. The last procedure was associated with more intense inflammatory reactions, delayed healing, and morphological alterations of the alveolar crest. Seventy-two male albino rats were used. Their upper right incisors were extracted with forceps through the alveolar route or after elevation of a mucoperiosteal flap and partial removal of the buccal bony plate; the wounds were sutured. The animals were sacrificed after 1, 3, 6, 9, 15 and 21 days. The pieces of jaw containing the dental alveoli were processed for routine histological analysis. Semi-serial sections stained with hematoxylin and eosin showed that the removal of the buccal bony plate was related to: (1) a more intense and prolonged inflammatory reaction within the socket, (2) a delayed chronological evolution of its healing process, (3) early connective tissue neoformation near the edges of the sectioned bony tissue, and (4) a shape loss of the alveolar crest at the cervical third.
The aim was to study bone formation in tooth extraction sockets of rats with experimentally induced renal hypertension. As soon as hypertension was detected the upper right incisor was extracted. The animals were killed at 3, 6, 9, 12, 18 and 21 days post-extraction. At day 9 the hypertensive animals showed bone formation with little osteoblastic activity, the bone was more cellular and had immature osteoblasts and endosteal cells without trabeculae formation. In the medullary spaces oedematous connective tissue, dilated vessels and undifferentiated cells were seen. We concluded that these animals presented a different pattern of bone formation when compared to the control animals.