Study of the inflammatory process induced by injection of carrageenan or formalin in the rat temporomandibular joint.

The aim of this study was to evaluate the effects of the injection of two phlogistic agents, carrageenan and formalin, in the rat TMJ, and the inflammatory process induced by these substances. In this study, a total of 45 adult rats were distributed in two experimental groups and a control group. The animals were sacrificed after three hours, 24 hours, three days, seven days, and 15 days after a single injection of each substance.

[Total resection of the zygomatic arch in the growth period: experimental study in rats].

The results obtained after total unilateral resection of the zygomatic arch in Wistar rats were evaluated by means of cephalometric measurements. The resection of the right zygomatic arch was carried out in one-month-old rats, and the animals were sacrificed two months later. The skull and hemimandibles were submitted to axial and lateral radiographic incidences.