Teeth Breaking on Dentures

I have implants where the dentures are attached by screws going through the denture and attaaching to the implants. To remove them, I have to go to the dentist to have them unscrewed. My problem is that teeth keep breaking off the denture; I've had 4 break in the last 5 months. What could be the problem? Is this normal?

[scottma]

the cause of frequent breaking off denture tooth may be overloading of the affected tooth, optimal occlusal adjustment is indicated.