Leonardo M R, Utrilla L S, Rothier A, Leonardo R T, Consolaro A
Araraquara Dental School, UNESP, Sao Paulo, Brazil.
Int Endod J. 1990 Jul;23(4):211-7. doi: 10.1111/j.1365-2591.1990.tb00102.x.
A study of the subcutaneous connective tissue response of 24 white rats to three different formulations of gutta-percha was undertaken. The prepared specimens were examined under the light microscope after intervals of 7, 21, 60 and 120 days. The results showed identical tissue responses after the initial period of 7 days. However, after 120 days the gutta-percha supplied with the Ultrafil system presented mature granulation tissue with neither oedema nor vascular congestion, in contrast to the responses observed with the McSpadden and Obtura formulations.
对24只白鼠的皮下结缔组织对三种不同配方的牙胶的反应进行了一项研究。制备的标本在7天、21天、60天和120天后在光学显微镜下进行检查。结果显示，在最初的7天期间后，组织反应相同。然而，120天后，与使用McSpadden和Obtura配方观察到的反应相比，配备Ultrafil系统的牙胶呈现出成熟的肉芽组织，既没有水肿也没有血管充血。
