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This in vitro study evaluated the dimensional accuracy of different transfer impression techniques for multiple implant supported prosthesis. A metal bar was made on a master model with three tilted implants. Five groups were carried out, having as study factors the union of impression transfers (orthodontic wire and GC Pattern LS® at the heights of 5 mm and 2 mm of the mini-abutment belt (PAT5 and PAT2); dental floss and Duralay® resin at the same distances (DUR5 and DUR2) and a control group (LIV) - isolated square transfers. Eight models were obtained for each group and measurements of the gaps of the mini-abutment/structure interfaces were made in the experimental casts through a profile projector. Analysis of variance and Tukey's tests were used. Statistical calculations were performed using the SPSS 23 program (SPSS Inc., Chicago, IL, USA), adopting a significance level of 5%. The PAT5 transfer technique resulted in gap values significantly lower than those found for the PAT2 group, which, in turn, was associated with gaps lower than those observed in the DUR5 and DUR2 groups. In the LIV group, the gap values were significantly higher than in the other groups. It was concluded that, among the techniques researched, the technique with splinted transfers with Pattern® and orthodontic wire at 5 mm from the abutment strap exhibited the best results, being the most indicated for the transfer of multiple tilted implants. The technique with isolated transfers showed less favorable behavior.
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