Resumen

KOOGI SONODA, Celso et al. Periodontal ligament remotion using friction of sodium hypochloride 1% solution absorbed gauze. Acta odontol. venez [online]. 2007, vol.45, n.2, pp.250-254. ISSN 0001-6365.

Studies have demonstrated the capacity of the sodium hypochloride in removing the non-vital periodontal ligament in avulsed tooth. Adequacies in its use are necessary to get a repair more satisfactory when teeth are replanted. Therefore, the purpose of this study was to evaluated the capacity of removal the periodontal ligament in root surface of rats, using friction of sodium hypochloride 1% solution absorbed gauze. Forty teeth were divided in 4 groups with 10 teeth, which after the extration, had been kept in dry way per 60 minutes. In control group, the teeth had been kept in 25ml of sodium hypochloride 1% for 5 minutes. In group II, the root surface was rubbed with in 25ml of sodium hypochloride 1% solution absorbed gauze for 1 minute and rinsed for 4 minutes in saline. In group III, the friction was of 2 minutes, and the rinsed period was of 3 minutes. In the group IV, the friction was of 4 minutes and the rinsed period was of 1 minute. After laboratorial processing, the specimens had been colored by the Masson tricromic and Hematoxilin and eosin for microcopy evaluation. The results had demonstrated that in the control group 100% of the root surface was covered by periodontal ligament. By means of the ratio test, it was observed that the friction per 1 minute was less efficient, being statistically significant (p<0,0001). The complete removal of the periodontal ligament it was only gotten in the period of 2 and 4 minutes.

Palabras clave : Dental cementum; sodium hypochloride; periodontal ligament; tooth replantation.