Sir, no matter which cap you go for, the tooth which is below cap,is gonna bear forces.
Since it get weeken during RCT and other procedure, it's better to avoid chewing/ breaking something hard from those crown.
Many times crown remain sound/perfectly fine, but tooth get fractured below.
And caps are no use if you lost your teeth
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you can definitely eat wafers biscuits.
apple and ol cut it in small pieces and eat.no need to restrict your food as such.