Are there any effects when it comes to weight lifting in our dental or teeth? Does lifting heavy will cause toothache?
If you've experienced toothache during lifting, I'm inclined to believe there is an underlying problem. Many lifters to indeed clench their jaw during particularly heavy lifts, and this might be interpreted as toothache.
Certain heavy lifts like deadlifts and pullups put strain on muscles in the neck/jaw area, which in some cases could affect muscles and tendons in the tempomandibular area.
Even so, it's still far from anything that should cause concern for your teeth during lifts, but it's worth it to "keep an eye" on whether or not you're gritting your teeth together when performing.
Heavy lifting does not cause toothache. Unless you are pulling the weights up with your teeth, then it might. It is very, very unlikely that you will press your teeth together so hard during a lift, that you will damage them. It just will not happen. Don't worry, your teeth are safe.