There are a few posts online with tips on how to repair broken dental plates, and there are commercial glues available to repair cracks or glue broken dentures back together. Some of these products and fixes can work in the short term, but ideally, if your dental plate or dentures are cracked, bent, dented or broken in any other way, you should take them to a professional to be repaired. Here's a look at why you may not want to do it on your own.