Wow, an inch and a half of ice on the limbs and trunk of a 40 foot tall oak? Must have been heavy enough to do major damage to your garage.

Year before last, Or was it last year. I forget, but we had freezing rain for almost 4 days in a row, and the weight of all that freezing ice accumulation of only a half inch or slightly less did sever damage to the majority of local trees.

So from experience, I can tell you that there is still damaged branch crotches in your Aristcrat pear. The half that did not break off might look good and strong right now, but give it some strong winds and you will begin seeing further breakage.

You can remove the tree and replant, or wait and see what it looks like after strong winds have broken off the other weak branches.

As for your question, yes the previously well established tree will send out a flush of water suckers every single place a branch has been lost. It will do this all in an attempt to regain a higher amount of foliage to better feed the roots system. In another three years your ornamental pear might seem to have taken on a more balanced look, but still not as nice as the tree appeared before the initial damage.

So Replace, or not? The answer depends on how long you are willing to wait for your tree to naturally regain its balanced look. It also depends on how willing you are to watch the damaged tree drop even more of its hidden damaged and weakend limbs that seem to be remaining nicely on the tree right now.

Well the side that broke off faces the road. the side I see is the intact side. Can't even tell from the house except for more light filtering through the tree. I might just see how it makes out this season.