Just making sure you have your teeth numbers correct, #8 and #9 are the front two incisors, central incisors. Teeth number #7 and #10 are the ones next to the front two teeth, and they are the lateral incisors. All of the incisors, #7,8,9,10 are considered front teeth and can have the gaps closed with direct composite bonding.The canines, #6 and #11 can be bonded to close the gaps if the space isn't too large.Usually direct composite bonding is not done on the bicuspids to fill gaps. Sometimes 2 or 3 surface fillings will close small gaps, but because there is so much force when biting with those teeth, fillings to close the gaps on those teeth don't hold up as well as onlays, veneers or crowns.