Hildeberto Francisco Pesce

Eficácia de substâncias químicas auxiliares na instrumentação de canais radiculares

By weighing human teeth, two auxiliary chemical methods in the instrumentation of root canals were compared as follows: Endo PTC in alternation with 1% sodium hipochlorite followed by irrigation, aspiration with detergent/antisseptic solution (group A) and with 1% sodium hipochlorite alone (group B). Our conclusions indicate that: 1) Differences occured in two of the studied groups in three categories. 2) Group A showed a greater difference of weight when compared to group B (p < 0.01). 3) Group B required a minor time of instrumentation in relation to group A (p < 0.05). 4) Relative to the difference of weight based on time unit, group A presented higher values when compared to group B (p < 0.05).

Análise morfológica comparativa do preparo de canais radiculares curvos com dois tipos de instrumentos endodônticos

O objetivo do presente trabalho foi averiguar a ocorrencia de desvio apical e a conicidade do preparo resultante do emprego de tecnica de instrumentacao seriada em raizes mesio-vestibulares de molares superiores variando-se o tipo de instrumento (limas tipo K e Flexofile). Apos o preparo, as raizes foram diafanizadas e submetidas a exame macroscopico com auxilio de lupa de 8 graus positivos. Dos resultados, consta que a lima Flexofile propiciou menor ocorrencia de desvio apical, bem como melhor qualidade de preparos conicos continuos

CONFIABILIDADE DO GELO E DO TETRAFLUOROETANO NA DETERMINAÇÃO DA VITALIDADE PULPAR

The aim of this study was to verify the ability of ice and tetrafluoroethane in detecting pulp vitality in 2,420healthy human teeth from patients with ages between 20 and 30years. The data obtained allow the following conclusions: tetrafluoroethane was significantly (p<0.01) more reliable when compared with ice stick for detecting dental pulp vitality. Reliability of tetrafluoroethane according to region was, in decreasing order: lower incisors, lower canines, upper bicuspids, lower bicuspids, upper molars, upper incisors, upper canines, lower molars. Ice stick reliability, in decreasing order, was: lower incisors, upper incisors, upper bicuspids, upper canines, lower canines, lower bicuspids, upper molars, lower molars.

EFICÁCIA DO BASTÃO DE GELO E DO TETRAFLUOROETANO NA DETERMINAÇÃO DA VITALIDADE PULPAR

The aim of this study was to evaluate the capacity of ice and tetrafluoroethane in detecting pulpal vitality in 594 human decayed, sound, and restored teeth of patients 47- to 60-years-old. We observed that the test carried out with tetrafluoroethane produced a significantly (p << 0.01) greater number of confirmations than that with ice

Removal of dogs' gingival pigmentation with CO2 laser

The aim of this study was to analyze the ability of CO2 laser to remove physiologic pigmentation of gingiva. Dogs were chosen for this study because of their intense black pigmentation on the gingiva, similar to what can be found in human negroes and other dark- skinned races. Three specimens were irradiated at the left side of the buccal aspect of the gingiva, while for comparison the right side was used as a control. CO2 laser in a continuous mode applying 3 watt power was used (Xanar-20, USA). The portion to be irradiated was continuously irrigated with saline solution, to prevent tissue damage from the excessive heat generated. The handpiece device irradiated the target easily and fast, with no bleeding. All the pigmentation could be removed from the portion exposed to the laser beam. A 45th day follow up showed very little repigmentation just in one of the specimens. It could be concluded that CO2 laser irradiation can be an alternative to remove pigmentation of the gingiva for cosmetic purposes. The risk of repigmentation exists, so the patients should be aware of this inconvenience, sometimes demanding further irradiation.