Análise quantitativa do corante azul de Evan extravasado do interior das câmaras internas dos implantes por suas interfaces protéticas nas condições: Hexágono Externo (HE) - Hexágono Interno (HI) - Cone Morse (CM) / Quantitative analysis of Evans blue dye leakage from internal implant chambers through their prosthetic interfaces under the following conditions: External Hexagon (HE) Internal Hexagon (IH) Morse Cone (MC)

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

06/09/2011

RESUMO

Research and studies seek to evaluate the capacity of adaptation and sealing between the implant-intermediate connections of different dental implant systems. It has recently been observed that in implants with screw-retained abutments, various phenomena, such as screw4 loosening and fracture, rotation and fracture of the abutment with bacterial penetration into the internal chambers of the implants have occurred as a result of maladaptatation at the implant-abutment interface. At the level of this region, a small space known as a microgap is described, and is a relevant factor in remodeling of the crestal bone and peri-implant soft tissue health in the long term. The purpose of this study was to investigate the extravasation of Evans blue dye solution in three types of implants and their respective intermediates during a period of six (6) days, every twenty-four (24) hours, with an interval in one hundred and wenty (120) hours, by means of agitation provided by an agitating table. To do this, thirty (30) implants were used, ten (10) of each type, with their respective prosthetic intermediates and mini-abutments, divided into groups as follows: Group One (1) External Hexagon implants (EH), Group Two (2) Internal Hexagon (IH) and Group three (3) Morse Cone (MC). Into the interior of each implant, Evans blue dye solution was inserted with a pipette in a volume or quantity proportional to its internal space. After the dye was put into the implants, the abutments or intermediates were coupled and the screws tightened to a torque of twenty (20) Ncm, with a Gauge torque meter (Tohnichi), and they were individually deposited in amber-colored microtubes positioned so that the intermediates faced downwards. This was immediately followed by the placement of (1)ml of deionized water. Next, the tubes were hermetically closed and placed on a table with a microtube holder and stored for 24 hours, without agitation. Afterwards they were agitated for 10 minutes on an agitating table making uniform movements and from then on, a small quantity of water began to be collected from each microtube, where in turn these samples were analyzed by absorbance method of photometry, spectrophotometry, in which they showed the extravasation of the Evans blue dye solution in the implant system used. From the beginning of sample collection at the time of (24hours) until the condition on the third day or at seventy-two hours, the three systems showed no statistically significant alterations. From the fourth day, or at the time of 96 h., in the Morse Cone Group system, statistically significant differences were revealed between Group EH and IH. The results were tabulated and the ANOVA statistical test for two criteria and the Tukey test were applied for comparison among all the groups, with a level of significance of p<0.05. The results of the twenty-four-hour (24); forty-eight (48), seventy-two hour tests (72), there were no statistically significant differences, whereas in the period of ninety-six (96) and one hundred and forty-four (144) hours, showed the Evans blue dye solution extravasation from the MC system to be greater with statistical significance than in Groups EH and IH. It was therefore concluded that there was extravasation in the three systems in the initial condition. At the time of 96 there was greater extravasation from the MC system, which was perpetuated up to the end of the experiment, showing it to differ statistically in comparison with the EH and IH systems.

ASSUNTO(S)

espectrofotometria e solução azul de evan extravasamento extravasation implant-abutment implante-abutment spectrophotometry and evans blue solution

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