Bruxism is the posh word for grinding, clenching or gritting your teeth together. With your real teeth, this is not an issue because the structure of your teeth allows them to absorb the shock created by bruxisms. If you are prone to grinding or clenching your teeth you may not able to have dental implants because your new, implanted tooth will not have the structure which protects them from the pressure these actions produce. This will complicate the healing process and could damage your prosthesis teeth. This can be extremely expensive to repair.
A solution is wearing a special mouth guard made to wear at night.