Variaveis associadas a determinação do limiar basal de resposta da polpa dental ao estimulo eletrico / Variables associated to pulpal threshold determination with electrical stimulus

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

There are some unclear aspects about electrical pulpal threshold measure. The objective of this study was to determine the ideal conditions for pulpal threshold measure. Two hundred and fifty six healthy volunteers with teeth able to respond to electrical stimulus were selected and divided in 7 studies. Pulpal threshold was evaluated by means of an electric pulp tester, with a 2min interval between tests. The variables studied were: number of measures and volunteers, and the influence of moisture, conductive media, gender of the operator, room temperature, period of the day, volunteers? ethnicity, and administration of mefenamic acid and nimesulide. Pain sensibility was evaluated by Analogue Visual Scale (VAS). Pulpal threshold data were evaluated by ANOVA and t and Tukey tests; VAS results were submitted to Wilcoxon and Friedman tests. Results: the mean obtained with 3 measures was not dfferent than the obtained with higher number of measures; lower pulpal threshold means were obtained with previous dryness of teeth and neutral fluoride gel as conductive media; male and female volunteers presented higher pulpal threshold mean when evaluated by female operator; no difference in pulpal threshold were observed among ethnic Brazilian groups, yellow, white, and black, among periods of the day (8h, 11h, 14h and 17h), between room temperature bellow 15oC and above 25oC and with the administration of mefenamic acid and nimesulid when compared to placebo. It was concluded that at least 20 volunteers must be measured and 3 measures must be performed to determine electrical pulpal threshold; dryness of teeth can improve electrical conductance; operator gender can influence the volunteers? pulpal threshold; pulpal threshold is not influenced by room temperature, volunteer ethnicity, and single dose dministration of mefenamic acid and nimesulide. No circadian pattern was observed for pulpal threshold.

ASSUNTO(S)

pain dor estimulos eletricos polpa dentaria electrical stimulus dental pulp

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