One of the limitations of our study is the lack of matching arches and regions. This may have yielded variable data and would have perhaps influenced the outcomes of implant impression accuracy. Also, the exact position of the implant in relation to accuracy have not been considered in this study, and further studies should consider evaluating this.

A further limitation is that specialists undertook the management of the patients in this study, and it would have been interesting to evaluate the effect of clinical experience on impression accuracy, though that would have probably required a larger sample to obtain the appropriate power to assess these variables. A further limitation is the effect of implant angulations on the accuracy was not assessed in this study. Also, this study investigated impression accuracy in relationship to adjacent implants, and the results should be viewed regarding adjacent implants only, and that spaced and divergent implants would possibly yield different outcomes.