Complex sentence: Regulators and the dental implant industry have created a series of tests to determine the long-term mechanical reliability of implants in a person's mouth where the implant is struck repeatedly with increasing forces (similiar in magnitude to biting) until it fails.
Split into simpler sentences: Regulators and the dental implant industry have created a series of tests to determine the long-term mechanical reliability of implants in a person's mouth. This is accomplisted with a series of lab tests where the implant is struck repeatedly with increasing forces (similiar in magnitude to biting) until it fails.