Objectives: This study was a "in vitro" periodical radiographic analysis (7, 30, 60, 90, 120, 150, 180,210,240 and 270 days). Considering, buccolingual (B-L) and mesiodistal (M-D) ways, paste permanency time (Vitapex, Maisto, Holland and UFSC) and obturator cement (ZOE) of obturations in deciduous teeth.

Methods: After biomechanical preparation up to a #40 flexofile, irrigated with NaOCl and dried with absorvent paper, 5 groups of 10 roots each were obturated. The pastas were brought to the canals with a previosly calibrated Lestulo's spiral file. Then, they were imediatelly radiographied B-L and M-D ways and positioned in the perforations of physiologic serum soaked sponges, contained in 5 closed recipients. These recipients were placed in a 37 degrees Celcius with 100% humidity incubator for 270 days. Being retrieved only in pre-stablished periods for radiographies. The radiographic analyses received scores, 1, when there was reabsorption absence; 2, reabsorption presency up to the apical third; 3, reabsorption presency up to the medium third and 4, total reabsorption of the obturator material.

Results: Results were treated throught the Kruskal-Wallis test showing equivalency between ZOE and UFSC's paste (score 1) in 270 days, with statistica differency (p < 0,0001) from Maisto's and Vitapex wich were also equivalent among themselves (scores 2 and 2,25 respectically). Holland's paste in 90 days showed radiographically emptness canals, pointing the pasta's total solubilization.

Conclusions: We conclude that, to decidous teeth obturation that needs to fullfill its biological cycle up to 8 years, ZOE is the most indicated material, and the others being indicated to short and medium-term utilization.

Back to the Dental Materials: VIII - Others-Non-metallic Program
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