Influencia do cimento endodontico e dos sistemas de fixação na resistencia a tração de pinos de fibra de vidro

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The aim of this study was to evaluate the influence of adhesive system, endodontic and fixation sealer on tensile strengh of prefabricated glass fiber posts. Sixty-four bovin roots were selected and divided in eighth experimental groups resultant in the interation of Endodontics Sealer x Fixation System. The guta-percha plasticized (WS) by heat and a sealer containing eugenol (WOS) were used in root canal filling in the root canal filling was done using guta-percha plasticized by heat, only. So, the influence of eugenol in fixation systems could be analyzed. It was used two adhesive systems: RelyX/ Single Bond e C &B/ All Bond 2 and the association between them (Rely X/ All Bond 2 e C &B/ Single Bond), all divided in 6 groups: GI - SB/RX/WS; GII - AB/CB/WS; GIII - AB/RX/WS; GIV - SB/CB/WS; GV - SB/RX/WOS; GVI - AB/CB/WOS; GVII - AB/RX/WOS; GVIII - SB/CB/WOS. After the inclusion, the specimens were submitted to tensile strengh in a Universal Testing Machine - EMIC - model 5000, under 0,5 mm/min of velocity. The results expressed in Kgf were schedule and submitted into statistical analysis. They showed no significant statistical effect to the sealer agent and to the interaction sealer X fixation system (Analysis of Variance Test, a= 0,05). However, Tukey´s test (LSMEANS) showed higher mean of tensile strengh to the system Single Bond/RelyX 37,41(12,86)a, but no statistical difference between this system and the other one - All Bond 2/C&B 27,13(8,34)ab was found. In the other hand, minor average was showed by system Single Bond/C&B 21,36(6,3)c, but no significant difference between this system and the other one All Bond 2/RelyX 33,45(11,49)bc. Thus, it follows that the endodontic sealer didn´t affect fixation systems of pins and the system All Bond 2/C&B and Single Bond/RelyX showed similar results of tensile strengh. It also follows that the association between an adhesive with acidic resin monomers and a chemical cured resin sealer can cause drop of potencial bond strengh.

ASSUNTO(S)

cimentos dentarios - biocompatibilidade polimerização eugenol eugenol dental cements monomers monomeros biocompatibility polymerization

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