The 29-year-old could not prevent his side from being dumped out at the group stage as Germany and United States progressed ahead of them from Group G.
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"I never thought of Ronaldo as the spearhead; it was not on my mind to put Ronaldo as the only centre forward since the beginning of the tournament," he told TV1.
"I think it's not the best for his goal tally and for the team. We talked about it, of course. He did not seem to feel comfortable in that position but it was not necessary for him to tell me that."
The skipper was a major injury concern ahead of the World Cup and did not look at full fitness in all three games but Bento insists that the Ballon d'Or holder would not have been risked had he not proven himself in training in Brazil.
"When he reached the training camp he was not at 100 per cent but then he was able to train and play," the Seleccao boss added.
"He played with great effort and sacrifice and he was medically fit - he would not have played otherwise. There was not any pressure to speed his recovery."